I really dislike the habit of the culture in the US trying to make exercise a competition, so you get high intensity "brag-worthy" workouts like P90X or cross-f

I really dislike the habit of the culture in the US trying to make exercise a competition, so you get high intensity "brag-worthy" workouts like P90X or cross-fit or what-have-you. The best exercise regime is one you can maintain, which can be as simple as just taking a walk for a bit every few days or some low intensity yoga at home. And those sorts of things have major long-term health benefits, they're vastly better than trying to go hard and injuring yourself or failing to maintain exercise as a regular habit.