[Retrofitted]

Maybe not so much. I've been doing isometric holds against resistance for five years now. No meditation to it -- it's a killer what it does to your muscles and it shoots my heartrate up pretty well, even for a short 10-second hold (if I use dynamics as well). My BP has fallen close to 15%, systolic and diastolic and vascularity was noticeable after the month week.

I'd love to know why isometric holds work, but I don't think meditation plays a part. Of course, anecdotes are just that for a reason. :)

[Harmless Teddy Bear]

Meditation in that your mind is not working on other things.

At least mine does not. When I first started I was concentrating on not falling over. Then I moved on into trying to remember to not hold my breath. Then on to "Come on you stupid second hand. MOVE IT!"

Now I don't think of anything except "breath in, hold for count of five, slowly breath out"

I guess it is what you make of it.