Aug 23 2016
The Dog Days of Summer
… winter is around the corner. At least in my mind.
It is still summer, and the weather is beautiful, but I am preparing a training plan for the 2016/17 season, which starts with a preparation for a Head Race in the first weekend of October, and after that it will be back to base building, and probably a lot of erging. I am not changing my plan radically from last year, just refined my planning spreadsheet a bit, and planned out the coming 7 weeks until that head race. This week is a freewheeling week, just doing the sessions that I like (and finally get the August CTC in), but after that I will be doing some lactate testing and then it will be steady state and threshold workouts in a 2×3 week mesocycle.
One or two erg races, one in January and maybe one in December. And then an important head race in the beginning of April.
So this week is free form. I have registered for just the Masters 1x in the local races in Břeclav coming weekend, but I will do the sessions that I like and let the race happen without any special preparation.
Today, I left work slightly early to head to the lake. The session I chose was an “intensive Steady State” from the book about Masters Rowing. It was:
4x(4’/3’/2’/1′)/3’Rest @ 20/22/24/26spm
Actually, “das Buch” calls this an extensive endurance session, but I wasn’t entirely sure if that was the right categorization. The plan was to do the session without a paying too much attention to the paces. Just hit the SPM and focus on technique. As I will explain below, I wasn’t entirely successful.
The other thing I wanted to do was play with my new SpeedCoach by running the workout in parallel in CrewNerd and in the SpeedCoach. In the SpeedCoach I programmed it as a 4×10’/3′ rest. In the SpeedCoach GPS 2, you can actually plan out the detailed workout as I did in CrewNerd, but on the water it turned out that I am too unfamiliar with the interface to manage that. Lesson learned. Program workouts on the shore, next time.
I set both devices to “auto/start” at factory settings, and started the workout with a 30 second count down. On both devices, the sessions started simultaneously, or at least the time difference was less than 0.2 seconds (estimated).
Using the power or rowsandall.com, I could compare the workout results from both tools. There was one caveat. It turned out I could pair my heart rate belt only to one device, and as soon as I started CrewNerd, the SpeedCoach automatically lost heart rate info.
Here is the comparison of the “raw” data:
The raw recorded data look a lot more noisy than what the CrewNerd display actually showed in the boat. On the CrewNerd display, the pace values were jumping around by +/- 5 seconds around the more stable value shown on the SpeedCoach. Rowed distance and time were equal on both devices (within 5m for distance). Using the power of rowsandall.com, I smoothed out the CrewNerd data a bit.
I think this shows that the smoothing function on rowsandall.com is very useful, especially if you smooth the data before exporting to sports sites such as SportTracks.mobi or Strava.com, and to the Concept2 logbook.
Here is the comparison plot for SPM:
On the water, I had the impression that the CrewNerd SPM was jumping around a bit more, and the SpeedCoach GPS seemed to react a bit faster to the stroke rate changes. The SpeedCoach display has a SPM resolution of 0.5 spm, so you can actually get values of 19.5 spm or 23.5 spm. Unfortunately, the export to FIT format rounds this to integer values, because of the way Cadence is defined in the FIT format, I guess.
Here is the colorful plot of the main workout:
Pie chart:
I wouldn’t call this a “extensive endurance” session. The way I did it today, it’s more a threshold session. Here is the workout summary:
Workout Summary - media/20160823-180537-2016-08-23-1723.CSV
--|Total|-Total-|--Avg--|Avg-|-Avg-|-Max-|-Avg
--|Dist-|-Time--|-Pace--|SPM-|-HR--|-HR--|-DPS
--|08741|40:00.0|02:14.0|23.0|176.1|180.4|09.9
Workout Details
#-|SDist|-Split-|-SPace-|SPM-|AvgHR|MaxHR|DPS-
01|00867| 04:00 |02:18.2|19.5|154.0|160.0|11.1
02|00688| 03:00 |02:10.5|21.7|168.0|174.0|10.6
03|00477| 02:00 |02:05.3|24.1|178.0|181.0|09.9
04|00238| 01:00 |02:04.7|26.2|181.0|183.0|09.2
05|00839| 04:00 |02:22.5|21.3|176.0|190.0|09.9
06|00615| 03:00 |02:25.8|22.4|183.0|190.0|09.2
07|00442| 02:00 |02:14.9|23.2|181.0|184.0|09.6
08|00234| 01:00 |02:06.3|25.4|185.0|187.0|09.4
09|00873| 04:00 |02:17.4|20.8|167.0|175.0|10.5
10|00672| 03:00 |02:13.1|21.8|176.0|178.0|10.3
11|00467| 02:00 |02:08.6|24.0|180.0|182.0|09.7
12|00237| 01:00 |02:06.4|25.0|182.0|184.0|09.5
13|00780| 04:00 |02:33.7|20.0|166.0|171.0|09.8
14|00638| 03:00 |02:21.0|22.7|176.0|180.0|09.4
15|00442| 02:00 |02:15.4|23.6|181.0|182.0|09.4
16|00232| 01:00 |02:08.0|26.2|183.0|185.0|08.9
And the same data from the SpeedCoach:
Work Details
#-|SDist|-Split-|-SPace-|SPM-|AvgHR|MaxHR|DPS-
01|02267| 600.0 | 2:12.3|21.7| 000 | 000 | 10.4 - tailwind
02|02127| 600.0 | 2:21.0|22.4| 000 | 000 | 9.5 - headwind
03|02244| 600.0 | 2:13.6|22.2| 000 | 000 | 10.1 - tailwind
04|02092| 600.0 | 2:23.4|22.1| 000 | 000 | 9.5 - headwind
Workout Summary
--|08730| 40:0.0| 2:17.4|22.1| 000 | 000 | 9.9
Looking at the totals, 10 meters difference in recorded distance. I have to look into why the average pace is so different. The correct average pace is 2:17.4 (SpeedCoach) and 2:17.3 (CrewNerd). I guess a bug fix is needed for my processing of the CrewNerd summary file.
Looking at the graph, you notice there is a lot of red in the second (head wind) interval. The reason is the following. During the first interval, I rowed behind a Lodni Sporty (that is the “evil” 🙂 club on our lake) quad. When I turned, they turned as well, and they passed me during the rest period. About a minute into my second interval, a coach launch speeded from the Lodni Sporty club towards the quad, creating an enormous wake in which I rowed my 20spm piece. By the time I had moved a bit to the right to be directly behind the launch and out of the wake, the quad (and the launch) suddenly slowed down.
I passed them and there was the following conversation between the Lodni Sporty coach on the launch and me:
Me: “What’s your name?”
Coach: “Who are you? I don’t have eyes in my back.”
Me: “Try to have a bit more consideration for other people trying to row a workout.”
Coach: “I told you I don’t have eyes in my back.”
Me: “You are supposed to look around. Like rowers do.”
Coach: Told me something I didn’t understand.
The English translation loses a bit of the sharpness. I used the informal (in French “tu”, in German “du”) form, even though this guy was evidently more than 20 years older than I. In the Czech culture, this is a very impolite thing to do without getting permission from the older person to use the informal forms. My questions were not so offensive, but using “tu/du” instead of “vous/Sie” was.
Anyway, apparently the guy was offended, because he threw me a nice big wake at the start of the third interval. For the fourth interval I took a course passing our club house, far away from his launch.
Aug 25 2016
OTW session reduced to 30 minutes and some more Power Based Training considerations
I couldn’t row in the morning, and I couldn’t leave work early.
So I arrived at the rowing club around 5:30pm. It was a very hot day and the lake looked gorgeous. Colorful sails from a sailing race that was ongoing, and many many paddle boards and pedal boats and swimmers and … The paddle boarders are multiplying rapidly. I admit that I quite appreciate seeing paddleboardettes in bikinis. It is a nice sight, and I am always friendly to them.
I was also friendly to the woman who swam in front of my single when I turned, and didn’t move. She was doing a back stroke but just didn’t move anywhere. To be honest, she looked like she had smoked something, or perhaps took her medicine at the wrong time or in the wrong dose. Completely off the world. Smiling to herself, and when I asked her if she was intending to go or not, she giggled, answered:
“My psychiater has a wet rucksack!” Then she burst out in laughter and almost disappeared under the water surface.
I looked at the paddleboardettes and made the cuckoo sign. They smiled.
But why only a thirty minute row? One reason is that the lake was full with boats and I couldn’t do a decent workout. The other reason was that I had lost precious time because
Well, it’s freewheeling week anyway, so I just did a 6km row.
Earlier today I fixed the “2:11 pace” bug on rowsandall.com. Using the Rowing Physics module on rowsandall.com, it’s premium users can calculate equivalent erg pace from the workout data. This worked fine for faster pieces, but all the slower segments seemed to get stuck to a 2:11 equivalent erg pace. I was looking for errors in the Rowing Physics module but couldn’t find any. At the end of the day, it turned out to be an embarrassing mistake in the Rowing Data module, which called the Rowing Physics module with a stroke rate of 30spm, instead of changing that to the real stroke rate.
I fixed the bug and now I can make a power estimate of my row on rowsandall.com before I export it to Strava or SportTracks.mobi. Here is the row:
Here is the power plot:
The corrected pace is the pace in absence of wind. There was a slight east wind today that was slowing me down for most of the row.
Here is the row on Strava, exported after doing the Power magic on rowsandall.com:
https://www.strava.com/activities/688834586/analysis
And here is one of the plots on SportTracks.mobi:
Oh, and in the Desktop version of SportTracks, I could do this plot.
I personally think it is a pretty cool thing to have Power estimates from OTW data. I will try to do some further descriptions of what I am doing and what rowsandall.com can do in subsequent posts.
By sanderroosendaal • Uncategorized • 2 • Tags: lake, rowing, rowsandall.com, single, steady state, training