http://www.cyberpresse.ca/actualites/in ... prison.phpSorry, I didn't found the article in english, but, shortly, it says that India have a new program of Yoga for prisonners. If they practice it for 3 months, if they fulfill some conditions and have a good attitude, they can go out 15 days earlier.
Following litterature class and earning degree permit them to go out earlier too.
Yoga is said to help reducing stress, temper attitude, giving a good shape, etc.
It depends of your view, I suppose, but I think it's a fantastic idea.
I would totally dig this kind of plan, where prisonners could learn either Yoga or Martial Arts, and gives privilege to the ones who choose to do studies too. I think that prison should be institutions not to only punish, but to be sure that the people who return in society have the tools to adjust themself inside it.