Mike wrote:
I’ve calculated all the paces in Watts just to make things more challenging and to keep from having to see slower paces than I’m used to. To keep the math simple, I set 16spm @ 50% of 2K Watts and increased Watts by 3% for every spm (so 17spm = 53% of 2K Watts, 18spm = 56%, etc.) The actual difference in intensity compared to calculations using pace (seconds/500m) is negligible.
I have been using the WP with watts instead of time to rate my workouts. I personally found using Watts easier for me to follow while rowing
Coincidently for the last several weeks I have set up my own system based on the WP rate and pace tables for level 4 workouts.
In order to find appropriate watt pace calculations I had to make a few assumptions.
The most important assumption was that the reference pace in the far left column of the WP pace chart for level 4 workouts was at 32 spm. I then calculated the stroke to power index- SPI for that pace.
Example:
I have a spreadsheet with a formula for calculating watts from pace and all I have to do is enter the pace and it automatically calculates the appropriate wattage.
For the sake of simplicity I will illustrate using 320 watts which is a pace of 1:43 or a 2 k of 6:52.
320 watts at 32 spm = SPI of 10
Percentages illustrated are rounded out for simplicity:
16 spm x SPI 10=160 = 50%of 320
17 spm=170 = 53% of 320
18 spm=180 = 56% of 320
19 spm=190 = 59% of 320
20 spm=200 = 62.5% of 320
21 spm=210 = 66% of 320
22 spm=220 = 69% of 320
23 spm=230 = 72% of 320
24 spm=240 = 75% of 320
25 spm=250 = 78% of 320
26 spm=260 = 81% of 220
The numbers don’t exactly correspond to pace on the the tables laid out by Mike in his pace charts but I find the system a little easier to follow and calculate for myself.
Perhaps others can find this useful as well.
Ralph Giarnella MD