The session illustrated here is a session I did yesterday evening, based around VT1 as determined by my "count test". As you can see only 3.4% of the time was spent in non-productive training compared to the whopping percentage spent in active recovery on the group road ride the day before.
To me it's also highly significant that I was able to do yesterday's session at 20:00 when everything during the day that needed to be done had been done, including going to work. I really wouldn't have done any training if outdoor riding was my sole option.
|Power Distribution - Upper L2/L3 Indoors|