Welcome to LW!
I love your comics. I'm going to use them so that I don't forget my spanish.
I'm currently doing a little research (for myself) on NLP-type stuff. If you want a comprehensive source, then this is what I'm going to be purchasing shortly.
I'm not expert on yoga (but I've done a bit). I find that pure meditation is better for the mind than yoga (there is a lot of secular research that shows that meditation is good in a lot of ways for the mind). And I find that pure exercise is better for the body than yoga. some people like to mix the two. I don't.
Most people have a misconception about meditation where they think you have to be sitting with really straight posture in order to meditate. This just isn't true. I run and meditate all the time. Running is very good for exercise and is very conducive for meditation (especially if you just go in a straight line or on a treadmill).
I know that there is quite a bit of research on exercise and the mind. But most of it has to do with cardiovascular and not with weight training. I do both, I personally think running is better for the mind (and doesn't require a lot of technical detail on proper form).
Dawkins's "Selfish Gene" was one of my first "rationalist" books.