Is swimming underwater good for the heart etc.?

Question

I seem to like holding my breath and swimming as far as i can (within reason) when I'm in the pool. It feels good, but does anyone know if this is good for the body and if so how? Thanx

Answer 1

well swimming in general is good for your heart because it is an aerobic activity so you don't really have to be under water for it to be good or even better for your heart

Answer 2

all this does is gets you used to having less oxygen when you swim which is n't a bad thing.