I'll second this for but for any kind of exercise. If you're not disciplined enough (yet) to exercise by yourself, as the parent says, classes are a brilliant way to stick with it and keep motivated.

I get to the gym pretty much every day before work. The benefits are huge - more energy, better concentration, and of course just looking and feeling better in general.

Edit: for the deleted comment - I'm late 30s, not sure if that's young or not and I'm a night owl for sure. Also see a noticeable difference in those busy "I should skip the gym" periods if I don't go, as oppose to prioritising my exercise over my work (which yields far better results).