As a person who has spent a large percentage of my life with rehabilitative and preventative sport in both theory and activity I have to put this into the right light:
The above statements relate to “extreme” levels of exercise! Extremity here refers to recovery matters as well as compensatory matters. This translates to a certain amount of marathons, for example, which should maximally be run, as well as any amount that, for example, cartilage can not recover from or compensate!
On the other axis you will find exercise, moderate like in aqua aerobics, is prescribed in cases of degenerative cartilage symptoms, for example!
The same mechanisms apply to heart health!
Simply walking and eating ice cream can only be a bad joke, if at all, in our context here!
As goes with all that has been said here:
Recovery must always be possible, …elsewise we would be catabolic, to say the least!