[Llamamoe]

> For the rest, are they 100% committed?

In poor health, willpower often fails long before physical performance, and there are many different possible barriers, like struggle to eat properly, poor nasal breathing, general fatigue, poor posture and running form, etc.

Personally, I can run for a longer time, but between having to push through mental fatigue and very poor nasal breathing, it's an extremely unpleasant, aversive experience. Even when I can do it, it's really harsh on me.