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Aug 1 2019

The EURow Regatta in Linz, Austria

Friday

On Friday, July 26, we drove our trailer to Ottensheim near Linz. That’s a very easy 3.5 to 4 hour drive, down to Vienna and then basically following the Danube upstream, passing beautiful Melk and other nice places.

Romana and I parked the trailer on the race venue, claimed rack space by putting our boats on it, and then drove back to Linz to find our accomodation.

The regatta course in Ottensheim – photo by Natascha Kral

We had a small 1 room apartment about 2km east of the center of the town. It was past 7pm when we wanted to get something to eat, so I pulled out my phone and looked for the nearest place on Foursquare. This turned out to be some place with good reviews, about 700m of walking in the southeast direction.

That turned out to be walking 1500m, because of some construction sites blocking the shortest route. And when we arrived there, in the middle of an industrial area, the place was closed for the summer.

So I thought we should take a taxi to the city center and eat there. Well, there’s no Uber in Linz, and before I had figured out the phone numbers of a classical taxi service, we had a better idea. There was a big hotel close to our apartment, on the bank of the Danube. Why not have a dinner in the hotel restaurant? That worked out, but we ate later than planned, and we got a 3km hike as our exercise of the day.

Later, we found a piece of paper in our apartment, listing places to eat including opening times.

Saturday

Romana dropped me off at the regatta course in the morning, and then drove to lake Lipno on the Czech side of the border to pick up our son Robin, who had spent a week at a sailing summer camp.

I took care of my single. Then I had a coffee with Dave and Daniela who represent Wintech, Concept2 and Nielsen-Kellerman in the Czech Republic, to tie out some details about the September camp.

Then it was time to get ready to race.

The EURow regatta (I don’t like the name, by the way) is a revamped Austrian Masters Nationals. It’s open for crews from other nations, and they are marketing it as a EU wide regatta, sort of like Euromasters in Munich. As it is a new or re-branded event, and it is held on the same course as the World Rowing Masters Regatta (WRMR) in 2020, Romana and I (and a few other Czech Masters) thought it was a good idea to check out this regatta. My other motivation was that I have done very little racing in the single, in this season, and I know I need some race experience as a preparation for this year’s WRMR. The good masters rowers in Austria are fast enough to be a good trial. One always performs differently in racing conditions than in a training.

The format of the regatta was heats on Saturday (but the heat winner did get a medal) and finals on Sunday (with medals for the first three). As the Masters C 1x had only 6 participants, Saturday was a race for which lane you race in on Sunday.

So how did the race go? It was ideal weather, almost no wind, flat water, fixed start pontoons and I didn’t know 4 of my 5 opponents. So it was an ideal practice race. The only opponent I knew was Mr Helbig. Mr and Mrs Helbig are usually a few seconds faster than Romana and I in the mixed 2x, but I never raced him directly in the single. Also, I didn’t check his online results, but somehow was expecting him to be roughly as fast as I.

I had a great start. Some people were ahead of me and some were behind, including Mr Helbig. Based on my Critical Power curve of last season and recent trainings, I was aiming for around 315 to 325 Watts. When I took a first glance at the SpeedCoach, about 200m into the race, I was going at 350W. I decided to let that gradually drift down while keeping the stroke rate at 32, then wind up in the second half.

I succeeded beyond my expectations. I was able to hold the power around the 340W range.

Nobody passed me and I didn’t pass anyone else, although I tried hard to catch up with the guy rowing ahead of me. I finished third. As you can see from the picture, I was happy with the result.

Look, I had the most consistent splits from the first to second 500m of all competitors!

The picture also gives a really good impression of the nice flat water. According to the official results I finished third (no surprise) in a time of 3:48.

With that race a success, we spent the afternoon exploring the old town of Linz.

In the evening, I uploaded the race’s data to the rowsandall.com site. As expected, this did shift my Critical Power curve by about 25W around the four minute benchmark. Yay! I guess I have to move my target for the upcoming regattas.

We had dinner in the hotel restaurant again. This time, we walked straight to it, instead of doing a 3km hike.

Sunday

So Sunday would be a repetition of Saturday’s program, but two hours earlier (and divided in “big” and “small” finals for those disciplines that had more than 7 competitors). And then, at the end of the afternoon, there would be mixed racing. Exciting!

My first race was at noon, so in the morning we took care of the double, had a coffee, watched some races, talked to friends. Had a really good time.

Then it was time to prepare for my race in the single. The weather was virtually the same as on Saturday, and I was up against the same opponents. However, I considered Saturday’s race a close result (except for the winner, perhaps), so everything was open again.

This time I was racing in lane 2. The first 200m seemed to be a repetition of Saturday (more about that later), with Mr Humbek leading, followed by Mr Hettler, and me rowing in third place. The difference was that my new target was 350W. When we were approaching the 500m mark, I thought I should try and pass Mr Hettler. I tried for 10 strokes, but was unable to get the power up, and I didn’t really close the gap.

As a consequence, I entered the third 250m interval with everything falling apart at the same time. The lactate burn peaked. The guy rowing behind me charged and was threatening to row through me. It was all very unpleasant, and all I could think of was somehow make it to the 750m without losing the bronze medal position. I did succeed in that, and then it was just a question of counting strokes until the finish line. Almost the same result as Saturday:

Here are the charts:

The orange is Saturday’s race. Green is Sunday. You can see that I pushed harder in the first 250m, but I paid for that in the third 250m. The average power was 5W higher on Sunday (+1%) but the time was 2 seconds slower (-1%). I thought the weather was identical, but seeing that everybody got a bit slower on Sunday, there may have been more of a headwind then.

Here’s pace. See the dramatic slowdown in the third 250m:

And here’s stroke rate:

I also studied the other metrics (stroke length, slip, wash, work per stroke) but they were nearly identical between Saturday and Sunday. Well, in WpS you can see the dip as well:

Here is me rowing (in the final 50m):

And here is the victory ceremony:

And a picture of Romana and me between my 1x race and our mix 2x race, watching other races:

And now it was time to prepare for the mixed double. Always a huge event. Romana and I hadn’t raced since Euromasters in July 2018. We also knew that Ostrava was keen on beating us, and we know that the Helbig family has historically rowed 2 to 5 seconds faster than we. We didn’t know any of the other crews.

We had a good start and by 500m we were in second position, but not by much. The Helbigs and Ostrava were a second behind us.

We kept pulling strong and we were rowing really well. Passing the 500m mark, I was expecting the other crews to fall behind, but that didn’t happen. It was one of those mixed double finals again. With 250m to go I upped the stroke rate to 38 (and higher), but Michael Helbig started his engine and the Helbigs pushed for an amazing sprint. In the heat of the race, we were also passed by Ostrava. Fourth place.

I guess we were a bit disappointed. However, we really had no idea whether we would be a fast or a slow crew, and looking at the times, and how close we were to the Helbigs, you can say that we are as strong as in 2017 and 2018. Now let’s work hard to gain a few seconds before the WRMR.

Then it was time to make a group photo with all the Czech participants:

We loaded the trailer and drove home. The last 50km was driving through a very heavy thunderstorm (at an average speed of 60 km per hour) and we were home by 10pm.

Oh, and just for fun, a map of my 1x race from rowsandall.com. It’s fun to add the water navigation overlay when we were so close to a big river.

By sanderroosendaal • Uncategorized • 0 • Tags: 1x, 2x, mix, OTW, race, racing, rowing, sprint

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Jul 29 2019

Two weeks of sprint training – part 1

The last time I wrote on my training blog was on July 15th. So I have to catch up and quickly cover 2 weeks of being back in the boat.

Week 1

Let’s look at the week overview for the first week:

So on Monday I did Steady State. Looking at the overview, it was a bit more intense than planned, but not by much. On Tuesday morning, Romana and I did some 1 minute intervals in the double.

We did fewer of them than planned (the plan was 2 sets of 6). These were the first sprint training sessions in our mixed double, and there were some technique frustrations that made us decide to take longer rests in the second set, and do fewer intervals.

On Wednesday, I did the first proper strength workout after my vacation, and it was a heavy one. I felt my sore muscles for three days afterwards, especially the upper body.

On Thursday, the only way to work out was to replace the steady state row planned for Friday with a bike ride from work to home. This is about 45 minutes. Here’s the Strava summary:

I use Strava Elevate to estimate power. It tells me this was a 229W normalized power workout. If I did that on the erg, it would be pretty close to a threshold session:

I think Strava Elevate overestimates some of the power values for the uphill parts. I have to say I arrived very sweaty and tired. But I felt that was mainly because I was cycling this with legs that were still not recovered from some pretty heavy deadlifts and squats on Wednesday’s weights session.

So on Friday, I planned to do Thursday’s 3x2k session. Unfortunately, there was a strong wind and thunderstorms around the lake, so it was not safe to go out on the water, and I had to do this session on the erg. This was the plan:

15 min WU
3x2k/5min (2k per 500m @ 24, 26, 28, 30spm)
15 min CD

Here’s the result:

You can see that I stuck to the stroke rates, but the power levels dropped from interval 1 to interval 2 and then they dropped even more …

Accumulated fatigue had taken its toll. I decided to skip the weekend sprints session. I had no time to do it anyway. On Saturday I drove to Lipno to drop off my son Robin at a sailing summer camp. Romana and I put the bike rack on the car, and we had a nice bike ride (no data recorded) around the lake, and some swimming. We had dinner in our hotel in Lipno, and drove back home on Sunday – through pouring rain.

Lake Lipno as seen from the bicycle path

Here is a picture of my son from the camp:

He is the cool looking guy on the right. When I see this picture, I wish I had his age and discovered the joy of sailing again. I was lucky to grow up in The Netherlands where we had plenty of opportunity to mess around with (sailing/kayaking/canoe/rowing) boats without adult supervision. Ah, fond memories.

Week 2

Weekend rest over, moving on to the next week.

On Monday evening, I did a steady state session in the single, and I had company. Cenek, another Masters rower from our club, went out in the single and we rowed together. It was great to have company. The other fun fact about this outing is that according to my SpeedCoach GPS, I did exactly 10,000 meters.

I also picked up my new Garmin watch on that day. It’s the Vivoactive 3. I will try it out for a few weeks, both for sleep tracking and recording different types of workouts.

On Tuesday, I did Wednesday’s strength session. I used the new Garmin Vivoactive 3 to autorecord exercise types and numbers of repeats. It did a pretty good job, but I felt like a gadget freak in front of my trainer, tapping the watch’s face after every set.

On Thursday, Romana and I did a 6x250m sprint session. Those sprints were supposed to be done 2 at 34spm, 2 at 36spm and 2 at 38spm.

To be honest, I planned to swap this session with Thursday’s one, and move the lighter looking 250m sprints to Thursday, to get some rest for the races. Butwhen I arrived at the lake, Romana had a really heavy day at work and she looked like she really wasn’t into any discussion. She didn’t look to energized for rowing either. This was one of these hot summer evenings when our lake turns into a 3km by 700m large swimming pool. Sailing boats. Standup paddle boards. Swimmers. Pedalos. Small electric boats. Romana hates this. She sits on bow and basically turns her head on every third stroke, and I can sense from the rowing that she’s not fully focused on technique. I guess when rowing in the single, I am worried about crashing into a pedalo or hitting a swimmer with my blade too, but in the heat of the intervals I am maybe a bit more careless. Romana is not.

So. A silent session mainly. I tactically decided to just row on stroke. We somehow did the sprints (changed from 250m distance based to 30 stroke count based so we wouldn’t have to fiddle with the electronics), and we made it a very short session:


Workout Summary - media/20190724-1710520o.csv
--|Total|-Total----|--Avg--|-Avg-|Avg-|-Avg-|-Max-|-Avg
--|Dist-|-Time-----|-Pace--|-Pwr-|SPM-|-HR--|-HR--|-DPS
--|07604|00:44:37.7|02:56.1|000.0|22.5|135.8|180.0|07.6
W-|01376|00:05:13.6|01:54.0|000.0|33.4|153.5|179.0|07.9
R-|06233|00:39:24.5|03:09.7|000.0|21.0|133.4|179.0|08.7
Workout Details
#-|SDist|-Split-|-SPace-|-Pwr-|SPM-|AvgHR|MaxHR|DPS-
01|00269|01:01.9|01:54.9|000.0|31.0|158.8|172.0|08.4 - tailwind
02|00238|00:53.4|01:52.3|000.0|31.5|156.8|173.0|08.5 - tailwind
03|00189|00:46.9|02:03.9|000.0|33.1|160.7|177.0|07.3 - headwind
04|00218|00:51.2|01:57.3|000.0|33.8|165.5|179.0|07.6 - headwind
05|00233|00:50.6|01:48.5|000.0|35.6|130.0|138.0|07.8 - tailwind
06|00228|00:49.6|01:48.6|000.0|36.1|148.4|175.0|07.7 - tailwind

I also reduced the stroke rate a bit when the traffic situation demanded it.

On Thursday, Romana and I went out in the double again. Same scenario as on Wednesday, except that this time Romana was in a very good mood, but we were time limited because we needed to load the trailer for this weekend’s regatta.


Workout Summary - media/20190725-1815590o.csv
--|Total|-Total----|--Avg--|-Avg-|Avg-|-Avg-|-Max-|-Avg
--|Dist-|-Time-----|-Pace--|-Pwr-|SPM-|-HR--|-HR--|-DPS
--|06729|00:40:34.3|03:00.9|000.0|23.5|140.6|182.0|07.0
W-|01171|00:04:24.8|01:53.1|000.0|34.4|152.3|181.0|07.7
R-|05563|00:36:10.0|03:15.0|000.0|22.2|139.2|181.0|06.1
Workout Details
#-|SDist|-Split-|-SPace-|-Pwr-|SPM-|AvgHR|MaxHR|DPS-
01|00229|00:53.3|01:56.3|000.0|33.9|116.2|131.0|07.6 - headwind
02|00243|00:56.4|01:55.9|000.0|32.9|168.8|180.0|07.9 - headwind
03|00241|00:53.6|01:51.4|000.0|34.7|156.9|181.0|07.8 - tailwind
04|00239|00:54.8|01:54.5|000.0|33.9|166.5|178.0|07.7 - headwind
05|00219|00:46.7|01:46.8|000.0|37.2|151.7|181.0|07.5 - tailwind

Boats loaded. Everything ready for the EURow (Austrian Open Masters Championships) in Linz/Ottensheim. Just need to drive the trailer from Brno to Ottensheim on Saturday. But I will report about that in a separate blog post.

By sanderroosendaal • Uncategorized • 0

mapka

Jul 14 2019

Sprint preparation

Saturday

The plan prescribed a 60 minute steady state session. It was a very rainy day, and Romana and I decided to do go indoor swimming. I swam 2000 meters and needed nearly an hour to complete it.

Sunday

Planned session:

20 minutes warming up

750m @ 32spm / 4min

500m @ 34spm / 4min

250m @ 36spm

20 minutes cooling down

It seemed the rainy weather was gone, so after lunch I rode the scooter to the rowing club. Unfortunately, the single rain shower of the day occurred exactly during my scooter ride, so I had to ride slowly and arrived completely wet. The lake was entirely calm after the rain shower, so I was looking forward to an awesome row.

Unfortunately, the wind grew stronger during the row. There was also two motor boats playing catch-up on the lake, creating some irritating wakes, and a few sailing boats to avoid. So I ended up having to do all intervals in quite a heavy chop / wake.


Workout Summary - media/mailbox_attachments/2019/07/14/f147438091254dc0a6a7732d15537f15.csv
--|Total|-Total-|--Avg--|-Avg-|-Avg--|-Avg-|-Max-|-Avg
--|Dist-|-Time--|-Pace--|-Pwr-|-SPM--|-HR--|-HR--|-DPS
--|02558|14:20.7|02:55.0|204.0| 27.0 |155.0|184.0|09.1
Workout Details
#-|SDist|-Split-|-SPace-|-Pwr-|-SPM--|AvgHR|DPS-
02|00750|02:51.1|01:54.2| 316.0 | 31.5 | 154.0 |08.3
04|00500|01:54.8|01:54.9| 301.0 | 33.0 | 169.0 |07.8
06|00250|00:54.9|01:49.9| 337.0 | 35.0 | 158.0 |07.8

The map shows the issues. The first 750m, I was able to row pretty straight inside the buoyed lanes. I wanted to continue down the course, but then I noticed the two motor boats chasing each other, so I turned and rowed back, then noticed the motor boats were going up the lake, so I turned again, and even had to take a direction outside the buoyed course to avoid a collision, then returned to the course in a heavy wake. The final 250 was rowed in the buoyed course but with pretty heavy chop.

The peak in power coinciding with a dip in pace is me turning into the buoyed course during the 500 and hitting the motor boats wake.

After the intervals, I did a 4km cooling down. It was a short but intensive row.

By sanderroosendaal • Uncategorized • 0 • Tags: 1x, lake, OTW, rowing, single, training

20190705_102451

Jul 13 2019

Back on the sliding seat again

On Sunday, June 30th, Kazi and I rowed a fun fartlek style workout in the double.

Then, on Monday, we drove off to Romana’s family cottage in the Giant Mountains, Czech Republic, where we were joined by my sister, her two sons, and a close friend.

And that was the start of a near two week intermezzo of unstructured cross training, which consisted mainly of hiking, but also involved sawing, hauling logs, building camp fires, and other pleasant mountain activities.

We did a five day trek through the mountains, doing an average of 6 hours of hiking a day.

Some nice mountain huts. Some unexpected encounters:

And of course we had to cherry-pick:

Thursday was travel day and on Friday, I had my first outing in the single after this good break.

The weather was funny. It was clouded and there were intense rain showers, which lasted about 10 to 20 seconds. I got totally wet, but it wasn’t unpleasant, because the air temperature was still around 22 degrees.

The workout was just paddling and a few pieces to establish a baseline, going into the last 8 weeks of preparing for the World Rowing Masters Regatta. After a few warming up sequences and practice starts, I did the following pieces:

  1. Trying to hold 330W for as long as possible. I basically broke down at the first bite of lactate pain.
  2. A four minute piece, evenly paced, maximum Watts
  3. A full out one minute piece

The first piece is slightly above what I think I can hold for  a 1k race.

This was rowed into a slight head / cross wind.


Workout Details
#-|SDist|-Split-|-SPace-|-Pwr-|SPM-|AvgHR|MaxHR|DPS-
00|00588|02:16.2|01:55.7|335.7|31.7|000.0|0.0|08.2

I originally wanted to continue pushing until the average power (on the NK SpeedCoach) showed 5W below the target, but somehow, after the vacation, I wasn’t prepared for the lactate rush and I just stopped rowing. Well, 588 meters. It’s a baseline, and I think pushing this out to something closer to 1000 meters is realistic.

I did a 3000 meter paddle to recover, then started a 4 minute piece. The goal of this one was to row it flat pace (power) but max out over four minutes. I was careful this time and chose 300W as the target.


Workout Details
#-|SDist|-Split-|-SPace-|-Pwr-|SPM-|AvgHR|MaxHR|DPS-
01|00981|03:50.6|01:57.6|298.9|29.5|000.0|0.0|08.6

Again, this was done from a race start.

I was surprised by how low I could rate but decided not to bother about stroke rate. It turns out I was at 600 J Work per Stroke, which is above what I am aiming for. Need to work on lightening up.

The third piece was a full out minute, from a standing start, which I did after a 2.5k paddle.


Workout Details
#-|SDist|-Split-|-SPace-|-Pwr-|SPM-|AvgHR|MaxHR|DPS-
00|00254|00:57.0|01:52.4|395.7|35.7|000.0|0.0|07.5

I have no heart rate data, because I forgot to pack my heart rate band. So why am I doing all this? Because, using the Critical Power plot functionality of rowsandall.com, I can use those three pieces to get a feeling for where I stand in terms of 1k fitness:

The chart takes data from yesterday’s pieces, plus a few longer pieces that I did in the fall and this spring. It doesn’t contain sprint data from the 2018 season.

Here’s a close-up:

This section of the CP curve starts at one minute and ends at five minutes. I expect the sprint races to take between 3:40 minutes and 4 minutes, depending on the weather conditions. The green curve is a conservative estimate and gives guidance for training pieces, while the red curve indicates where I should be for a regatta .

So the goal for the coming 8 weeks is clear.

Shift the red curve to the right and up.

The beauty of using the CP chart is that you can use different pieces, and you’re independent of the wind strength. I could do a full out 1k test, or I could repeat the pieces I did yesterday (what I intend to do) or I could use data from interval sessions.

By sanderroosendaal • Uncategorized • 0 • Tags: CP chart, critical power, OTW, rowing, single, sprint, training, vacation

kazisander

Jun 29 2019

More Double Data, and a Fun Drill

Thursday

A weights session. My weights trainer was sick, so I had to do it myself. I pretty much copied what she has me do normally. Only instead of bench press I trained a similar motion on a fitness machine. I don’t want to have the bar falling on me (we do go to weights and repetitions where I can barely lift the bar). Also, deadlifts was occupied, so I did the first few intervals with a kettle bell. On the squats, I was careful with the weights, so I added a few intervals on the leg press station, which really did my legs in.

  1. Substitution for bench press
  2. Seated chain row
  3. Deadlifts
  4. Squats, complemented with leg press

Friday

Wow! The first day this week where I had time for a morning row. What a luxury. I was the only rower on the lake at 6, and I shared it with three fishermen. I did a steady state row in the single, with a few higher rate bursts.

Saturday

Morning

My double partner Kazi is in town, so we did two sessions. The first one was a 8x500m/500m workout.

That went pretty well. What was even more fun is that we used Quiske pods under both our seats, so after the row (and after a quick swim in the lake), we settled on the club balcony, had a beer and fired up the computer. This is what we saw:

So stroke seat (that’s me) is the green line, and bow seat (Kazi) is the blue line. This was taken during one of the 500s, but pretty much all the 500s showed the same picture.

  1. During the stroke, my style is more segmented. I am not shooting the slide, but I definitely keep my back in the catch position longer, while Kazi starts pulling with the back already. (This must be the explanation, because our oars are pretty much parallel.)
  2. During the recovery, Kazi perfectly matches my seat speed.

Now the big question is if we would go faster if we would be more matched in terms of seat speed. I am not so sure. Here’s a picture of this crew during the 2018 edition of Euromasters (which they won).

Afternoon

The afternoon training was technique and drills. We rowed with pauses. Then we did the catch drill. Then we rowed without feathering. And finally, we tried out the “Chinese drill”. Greg from Quantified Rowing has done it in his Shanghai row (see the blog post about it).

It was fun to do. We started from rowing with pauses at 3/4 slide, hands just before the wing rigger, at every third stroke. We gradually lengthened the pause until it lasted 3 seconds. Then I added the “Shanghai drill”, hooking the handles under the wing rigger, clapping hands, grapping the handles again, and making the catch. We took turns doing the Shanghai drill with the other rower just pausing. And then it was time for the big moment.

It was fun, and it went surprisingly well. The trick is to be really stable during the recovery and to be really controlled and synchronized when you put down the handles, clap the hands, and grab the handles again. We liked it so much (and we liked the admiring looks of the girls on the stand-up paddle boards) that we rowed the entire 2k course clapping hands on every third stroke.

We did a 500m swim in the lake after the row, and then it was time to go home.

By sanderroosendaal • Uncategorized • 0

fig3

Jun 26 2019

Double Fun and Double Analysis, or how to prove that your wife is perfect

The title of this post is Double Fun because I had a lot of fun rowing doubles last week, and Double Analysis because there will be two in-depth boat acceleration analyses done using Quiske pods. And both rowing and analysis is ufn, so that’s double too.

First, a summary of a week of training:

Monday, June 17th

A weights session.

Tuesday, June 18th

Romana and I did a short steady state row in the double. It was very nice. We did the long full lake stretches as rate ladders. Power is estimated.

Wednesday, June 19th

Wednesday is eights day. By the way, here are a few new pictures from our last race in the eight. One of the photos shows us protesting (or were we waving to our fans on the bank?).

We did steady state with a few short bursts at higher power. I was pulling OK but we’ve had better sessions.

Thursday, June 20th & Friday, June 21st

We had a long day at work. Visitors from overseas. Visitors from the Middle East. Workshops. Demos. It was good, long, fulfilling, interesting, and everybody was happy in the end, and there was no time to go out and row.

Saturday, June 22nd

It was a warm, humid day, and I was hesitating if I should do this workout. In the end I did it: 5x1500m at 26spm, in the single. And it went much easier than I thought.

The lower power bits in the third interval are caused by steering. In the fourth interval it’s more about fatigue, and in the final interval it’s steering + fatigue. I was using Quiske with the pod on the oar.

In the data, I selected the fastest bits of each interval as well as the slowest bits. The left chart collects all the “fast” sections, while the right one summarizes boat acceleration and oar angle speed for the slow bits. I think the biggest difference is in how effective (and fast) I am around the catch. You can see it both on the oar angle velocity chart (bottom) as well as on the boat speed chart (top).

I had a great swim in the lake after the row.

Sunday, June 23rd

No training. We had family visits in “nearby” Pardubice (2 hour drive).

Monday, June 24th

This was going to be the day. I was going to measure seat speed for the bow and stroke seat of my mixed double. Finally, we would be having data to see where we can further improve.

It was not going to happen. I had everything: Two phones, two pods, seat pads. I forgot the second phone holder.

So we rowed “unplugged” (NK SpeedCoach only) and did a short session of 1 minute on / 1 minute off.

Heart rates are high, because it was well over thirty degrees Celsius when we rowed. The lake has turned into a giant open air swimming pool as well. Romana and I played around with the stroke rate a bit. That is why the two final intervals of each of the two series is rowed at 30spm instead of race stroke rate. It seems that it didn’t impact the pace too much.


Workout Summary - media/20190624-1720490o.csv
--|Total|-Total----|--Avg--|-Avg-|Avg-|-Avg-|-Max-|-Avg
--|Dist-|-Time-----|-Pace--|-Pwr-|SPM-|-HR--|-HR--|-DPS
--|09888|00:54:18.6|02:44.8|138.2|23.7|147.4|181.0|07.7
W-|03185|00:12:23.9|01:56.8|273.1|31.8|164.4|180.0|08.1
R-|06718|00:41:55.8|03:07.2|098.3|21.3|142.3|180.0|07.8
Workout Details
#-|SDist|-Split-|-SPace-|-Pwr-|SPM-|AvgHR|MaxHR|DPS-
01|00107|00:25.8|02:00.9|244.4|27.9|139.6|147.0|08.9
02|00103|00:23.4|01:53.7|277.6|30.7|137.5|150.0|08.6
03|00254|01:00.4|01:58.9|264.5|31.9|158.7|172.0|07.9
04|00248|00:58.2|01:57.3|281.3|32.0|171.0|177.0|08.0
05|00245|00:58.0|01:58.4|254.7|32.2|163.7|172.0|07.9
06|00253|00:57.4|01:53.4|285.3|33.5|163.6|175.0|07.9
07|00260|01:00.0|01:55.3|270.9|31.9|166.1|175.0|08.1
08|00255|00:59.2|01:56.0|263.8|31.6|165.7|173.0|08.2
09|00238|00:57.8|02:01.6|251.0|31.1|158.6|169.0|07.9
10|00253|00:59.9|01:58.5|279.0|32.2|172.3|179.0|07.9
11|00248|00:57.0|01:55.0|295.2|32.7|170.4|180.0|08.0
12|00237|00:54.0|01:53.8|288.3|33.3|168.7|178.0|07.9
13|00235|00:55.3|01:57.7|274.5|30.5|167.8|176.0|08.4
14|00249|00:57.5|01:55.3|281.8|31.2|168.7|178.0|08.3

Pace is not exactly where we want it to be, but it was hot, and we rowed after a long work day.

Tuesday, June 25th

This was going to be the day. I was going to measure seat speed for the bow and stroke seat of my mixed double. Finally, we would be having data to see where we can further improve.

This time I succeeded in getting us all hooked up. It was a very hot evening again. We rowed steady state and a few twenty stroke intervals at 24, 28, 32spm (in headwind) and 32, 38spm (in tailwind) to collect good race pace data.

So here is us at 24spm:

The top chart is boat acceleration, and the bottom one is seat speed. The chart start on the left at a point just after the catch (point of lowest boat acceleration) and finishes on the right after an entire stroke cycle. The two acceleration and speed curves are slightly different, because we are using two different phones (with differently sensitive accelerometers), and because speed is the integration of acceleration data, and (I suspect) a naive algorithm is used so cumulative errors cause the differences. Also, I had to hand select the data for this chart from two different “sessions” on the Quiske portal, so it may be that we are comparing two slightly different sets of strokes from the same interval.

The bottom chart is what we are after. This is the seat speed. You can see that seat speed increases after the catch and reaches a maximum (leg part of a sequenced stroke), and then decreases during the back swing and becomes zero at the arms pull, remains zero at arms away and back swing, and then slowly increases as we are sliding towards the catch during the recovery phase.

You can see that bow (green) has a slightly less sequenced stroke than stroke seat (blue). Her seat is moving slowly during the back swing and arms phase. In this sequence, we are slightly asynchronous, especially during the recovery phase. Let’s take a look at 28spm:

Well, the picture doesn’t change much, but the differences are smaller. Let’s take a look at 32spm:

Again, tiny differences, but I think this is a pretty good match. Finally, let’s look at the last interval at race pace:

This interval wasn’t really great. We were waked, tired, hot, and distracted. So I am not surprised we see some bigger differences here. Especially on the recovery, bow seat starts rolling the seat a bit earlier than stroke seat. Stroke than slides slightly faster.

But how serious are these differences? Let’s take a look at another double:

I think Romana and I should be happy with the synchronicity that we achieve. Here is data from another boat:

From this instagram post (click on the image to see the video on Instagram):

So we used a “random” sample of other published curve sets to say that we are already very good.

Mission failed: Romana and I didn’t find anything to improve.

Relationship saved, of course: As stroke seat and husband, I would find it hard to tell my bow seat and wife that she is less than perfect. Turns out we have data to prove she is perfect.

We also had a really good swim in the lake, after the session.

Wednesday, June 26th

Another Wednesday evening row in the eight. Today, the thermometer reach 37 degrees C and it was really hot. We did a short outing, but we did do some speed work in the eight. My heart rate band misbehaved a bit, I think:

In the first 10 minutes of this chart, only the seats 5 to 8 are rowing. From about 10 to 16 minutes into the session, seats 1 to 4 (including me on 2 seat) are paddling. The main purpose of this session was to get some time in at high stroke rates.

We had a long team swim after the row. The lake water was fantastic!

By sanderroosendaal • Uncategorized • 0

quiske_explained

Jun 17 2019

Legs? Emptied.

Monday

No training.

Tuesday

A weights session. Pretty heavy on the squats, and finishing off the legs with leg press.

Wednesday

Arrived at the club for a session in the eight. Four people turned up. One decided to go home because of the chop. The three others (including me) sat down for an erg session: 4x2km at 24spm. First two at high drag. I didn’t record the session in any digital way. Didn’t even have my phone with me to take a screenshot.

I did the first two high drag intervals at 1:56 pace and didn’t find it difficult. I was very surprised to find that I couldn’t hold 1:58 in the last two intervals (at normal drag factor). I think my legs were just getting very empty.

Thursday

I decided to do a steady state row up the gorge towards and beyond the castle. I had a sip of water every 3.5km and turned around after 7km. The first 10km of the workout were very pleasant rowing. I did record my steady state stroke using the Quiske app. I recorded my 20spm stroke on the straight 1km just before the castle, both on the way there and on the way back.

The top chart is boat speed (dashed lines) and acceleration (solid lines). The bottom chart is seat speed with respect to the boat. Here’s a walk through the chart. If you take the time to read it in detail, you will appreciate the differences later in this post, when I discuss 30spm:

  • The drive phase is indicated by the orange part of the bar (marked “Drive”). This is where the blade is in the water and you are putting in work to increase the speed of the system
  • The recovery phase is where the blades are not in the water. The only force that is working on the system is the drag of the water (and a slight contribution from air drag). As I am moving my 75kg body sternwards and then slowing down on the slides, there are some inertial forces that affect boat speed as well.
  • Actually, the moment the blade enters the water is all the way to the right end of the chart. It’s hard to give evidence without video, but I am almost certain that the blades enter the water very close to the point where my seat changes direction. It may even be slightly before, at the moment where the acceleration curve starts has an inflection point. Why do I believe that, because the blades entering the water immediately create a lift force on the blades which will propel the boat forward. However, the boat keeps slowing down, because I am starting to push on the footstretcher to change the direction of my body.
  • During the first half of the drive, my seat speed achieves it’s maximum value around the first blue bar from the left side of the chart (“max leg speed”). This is also the point at which the boat acceleration starts to hit positive numbers (speeding up).
  • The second blue bar from the left shows the point where I believe is the middle point of my back swing. This point coincides with the maximum boat acceleration. The legs are still working, the back is adding its force, and all’s well.
  • Going further to the right is the point I call “keep boat send”. This is what I tell myself, to remind me of the need to finish strong and have a strong arms part of the stroke. Acceleration is low, but the important point is that it’s positive. I am able to keep the boat accelerating all the way until tap-down.
  • Arms away. This may be a bit slow, because the boat is losing some speed here.
  • Start seat and back. I am not extremely sequential with this. The moment my arms are away, I start rolling up the slide as well as getting my back to catch position. Because of the transfer of momentum, I am now able to stop the boat speed drop and keep the boat at constant speed. I am actually pretty much able to manage my seat speed to keep the boat from slowing down.
  • Until the moment where I have to start slowing down my seat speed to prepare for the catch.

Thank you for reading the Quiske chart explanation in detail. Here’s the row chart:

During that second straight kilometer, at around 52 minutes into the row, I was catching up with another sculler, and that gave me just enough motivation to ignore the signals from my legs and keep pushing. Only later did I see that I actually pushed my heart rate into the red. I paid a price for that.

After the squats in the weights room on Tuesday, the heavy drag 2ks at 24spm on Wednesday, and 10km of steady state on Thursday, my legs started to refuse service. They just had enough.

I was fast enough to stay in front of the other sculler and even create a bit of distance between us, but my power gradually went down and in the last 10 minutes I was just wishing I was already back at the dock.

Friday

I decided to skip a session to give myself some rest.

Saturday

A fun session in the double. The only problem was that it was a very hot day.

Romana and I did the following session:

2km warming up

3x10min of 15″ on, 15″ off, at 34-36spm.

First series into headwind. I lost count, and it looks like we did one 15 second interval more than we were supposed to do. We rowed to the end of the lake, turned around, and did the second series. I had to skip the fourth to wipe the sweat off my hands. All was good, until we turned around again at the end of the lake to do the third and last series, into the headwind. After 4 intervals I stopped because I just had enough. After a brief break, we got rowing again and we did a few more 8 stroke intervals, but with longer breaks. We extended the last one to 30 seconds.

Sunday

I was hesitating being the planned session (8x500m/500m) or just a steady state. The lake was pretty choppy and windy. Romana was out in a mixed coxless four and they were doing the 500s, so in the end I decided to do them.


Workout Summary - media/20190616-1840460o.csv
--|Total|-Total----|--Avg--|-Avg-|Avg-|-Avg-|-Max-|-Avg
--|Dist-|-Time-----|-Pace--|-Pwr-|SPM-|-HR--|-HR--|-DPS
--|10812|00:59:25.9|02:44.9|164.2|23.4|146.7|181.0|07.8
W-|04215|00:17:46.4|02:06.5|276.8|29.3|161.2|179.0|08.1
R-|06605|00:41:40.4|03:09.3|116.2|20.9|140.6|179.0|07.2
Workout Details
#-|SDist|-Split-|-SPace-|-Pwr-|SPM-|AvgHR|MaxHR|DPS-
03|00509|02:00.1|01:58.1|294.3|29.5|151.8|171.0|08.6 - tailwind
04|00497|01:57.4|01:58.1|291.0|30.6|164.1|174.0|08.3 - tailwind
05|00498|02:00.4|02:00.9|280.0|30.4|160.6|176.0|08.2 - tailwind + chop
06|00510|02:26.5|02:23.7|253.8|27.3|163.7|174.0|07.6 - headwind + chop
07|00500|02:16.8|02:16.8|280.4|28.4|162.9|176.0|07.7 - headwind + chop
08|00510|02:14.1|02:11.4|283.6|29.9|166.2|179.0|07.6 - headwind
09|00489|01:57.2|01:59.8|270.5|30.2|160.0|174.0|08.3 - tailwind
10|00521|02:05.3|02:00.2|268.3|30.1|164.5|176.0|08.3 - tailwind

I ended up doing all of them. There was quite a lot of chop on the south end of the lake, which severely slowed me down in the third to the fifth interval.

I “Quisked” all the intervals and here is the summary slide:

I am showing only the first four intervals here, three tailwind ones and one choppy headwind one. It shows that despite the significantly lower boat speed, the choppy headwind interval wasn’t too bad.

Let me talk you through the chart.

  • Again, the “blades enter water” moment is actually the last blue bar on the right of the chart. That is when the legs start to push.
  • Boat is still slowing down (negative acceleration) but at the maximum seat (leg) speed it flips to a positive acceleration peak.
  • I am a little less smooth around the catch than on the 20spm steady state stroke. The acceleration dips slightly before it peaks again during the middle of my back swing.
  • At around 35% of the stroke duration, the seat stops and it’s back and arms, finishing with arms only. Happy to see that I keep accelerating the boat.
  • Compared to my 20spm session, I am more dynamic with the arms away and the boat doesn’t slow down in the first part of the recovery
  • When I start rolling up the back and the seat starts moving, I am creating a little boat surge. This is normal at higher stroke rates.
  • At higher boat speeds, drag is increased compared to my 20spm pace. When I stop accelerating on the slide, the boat starts to slow down. I might want to try to keep this accelerating almost all the way to just before the catch. I am doing this better at lower rates.
  • When the seat has to slow down, I have to push on the footstretcher and the boat acceleration goes to negative.

The “best” line seems to be the green one, but I am not sure if that was due to wind or me rowing better. Otherwise, no conclusion. I know what I am working on, and I am glad I see the evidence of that in the curves. I need to keep monitoring.

By sanderroosendaal • Uncategorized • 0

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