I just started using Concept2 ErgData for recording SkiErg sessions.
After a few sessions I see that the activities are not properly recorded – they do not recording during the rest intervals. This unfortunately leaves some gaps in the data.
It looks like Intervals.icu will just interpolate between these points when calculating averages or even season bests. This can be a bit optimistic when the missing period is actually a rest period.
Q: Is there a better way of doing this – except for the obvious (which is to ask Concept2 to log the full session)?
In the image you see:
63 s interval covering a gap. The average power is 20 w, but should probably be 60 seconds with 0 W.
15 max power – covering a 3 min long rest interval without data.
I had a look at this from a bug perspective but then I realised that it is actually behaving properly. Intervals.icu does interpolate the power data to 1 second per tick but only up to 8 seconds on this activity. Bigger gaps are zero. The power curve is computed by sliding increasingly wide time windows along the interpolated power stream and keeping the highest average power (total Joules for the window / width in seconds), which might include gaps.
It will look a bit less weird when you have done some more of these sessions.
@david I looked a bit more on this topic. Here you see an activity with 2x15 min @ 90 W with 4 min @ 0 W rest in-between. The rest does not have proper recording of the data.
In this case, wouldn’t it be correct to report the average power as (15 * 90 + 4 * 0 + 15 * 90) / (15 + 4 + 15) = 89 W instead of 90 W?
