Popular exercise classes like Peloton often focus on intermediate intensities rather than Zone 2 or peak capacity zones.

“if you do popular classes if you hop on a peloton class or something you're spending very little amount of time in that zone you're spending but you're also spending very little amount of time at peak capacity sort of north of kind of zone five you're spending a lot of time in the middle and i actually think it's that in the middle time that unless you're an athlete who competes in the middle is actually some of the least important areas to be training”