Yoga

Is Yoga the best value-for-time workout?
* In ancient times, people worked physically and so mental work like studying that Jewish people mandated was non-trivial.
* Today, we strive to keep the body in good shape but focus on our mental abilities and work mainly mentally.
* Yoga engages our full presence, both physical and mental. During practice, it feels like wasting good "mental" time. But it may just be the element that makes it the best value-for-time workout.
* Swimming, in contrast, can be meditative in a different way. You can think of other things while swimming for hours. This seems like the complementary activity - waste of physical time. You are not productive with your energy, and not being present in all aspects.
* I can testify that once, on improving my swimming-style, I was very present and enjoyed swimming in a very special and rewarding way.