Yeah, I wrote it down (very) wrong, my bad. PM5 does not store per-stroke data. But this is an extra reason to compute the avg power from time and distance and the formula instead of doing a real average of per-stroke power.

Once you know the average pace, the formula gives you the average power. And for the average pace you don't need to do an average of per-stroke pace: you just get it from time and distance, by definition. Somehow like the average speed is typically not computed as "the average of instantaneous speeds" but, more simply, as total distance over total time.

You can check all this from any random logbook session. Take this (from the logbook):

Code: Select all

```
Time Meters Pace Watts Cal/Hr S/M HR
16:52.8 4,500m 1:52.5 246 1145 27 178
5:35.9 1,500m 1:51.9 249 1158 28 174
5:37.5 1,500m 1:52.5 246 1146 28 179
5:39.4 1,500m 1:53.1 242 1131 28 181
```

You can do the same for the 3 other intervals.

If you want the overall average power you do the same with the overall time and distance: 4500m in 16:52.8 gives an average pace of (16*60+52.8)*500/4500 = 112.53 s, or 1:52.5. And for the power: 2.8/((112.53/500)^3) = 245.6 (it rounds at 246 here).