Yoga! Yoga! (To Belushi's chant)

Yoga is by far one of the greatest low impact exercise routines I have done. How is it possible to raise your heart rate to 140 simply through breathing and some poses? My HR stayed in that range for close to 45 minutes by posing this way and that. When I first began, I could hardly hold any of the poses, let alone get into any of them. Now I am actually able to hold my balance for close to 30 seconds and not fall over. Focusing on your breathing and trying to clear your head for an hour and a half is completely worth it and has increased my concentration immensely. At points, I am actually moving and stretching my body in ways I did not think were conceivable. If you have the opportunity, I would highly recommend yoga. Be prepared to sweat!