I think it is important to find the right form of exercise to suit each individual, that is why I feel that the picture below perfectly illustrates the correct form of exercise for me.
Sleeping with the occasional patting of the ball away when a light breeze blows it too close.
I could not only master this easily with a minimum of stress, but I know without doubt that I could keep this form of exercise up for hours, if not days. To each her own, and this is mine.
I see a new Olympic sport on the horizon.