[frereubu]

I think the point would be if you could replace ~8 hours of sleep with ~1-2 hours of meditation. I very much doubt it's a like-for-like replacement, but it might go some way to reducing the need for full sleep, e.g. 2 hours meditating + 2 hours sleeping = 8 hours sleeping.

[hahajk]

Is the idea that yoga/meditation are more efficient than sleep at redistributing the cerebral fluid? That would be very surprising.

[_y5hn]

What people really require for sleep vary a lot. But there are claims some people practicing very intensely, need only 4-6 hours of sleep at night. That's rarely a goal in itself though, as it's not a means to become more efficient or "save time", in a traditional, linear way of thinking at least.

However, the goal of meditation can be very diverse, since there are many different techniques, each with their own aims and side-effects. Generally, the main goal is often to calm the mind, make the body relax and let go of stress. There are many more benefits though, which you only realize when doing personal and experiencial practice over longer periods of time. It's not like the effects are the same for each person even, so it's more like a discovery process rather than do A, B, C techniques for X, Y, Z gains. However, there's a baseline of methods and general health, which is what it's usually used for. Very few people are suited to be munks or living in secluded communes like that. But it can be Very nice to be on a 1-2 week retreat now and then.