So i just did a power yoga dvd called Progressive Power Yoga by Mark Blanchard. I've had these dvds for a while but never did them. It was 90 minutes long and I couldn't believe how hard it was to hold my own body weight in certain positions; not to mention how inflexible i have become over the years. I found it more challenging than my regular weight workouts both mentally and physically. I dripped with sweat during this workout. Even though it was a tough workout i feel energized right now and not like i ran myself into the ground. I know many people who don't care for Mark as an instructor. He is a bit creepy/ touchy feely sometimes during the workout with his students (not just his wife) but i think its a great yoga dvd. It is a bit advanced but he tells you not to force any position and with practice it will come. The headstands and handstands are the most difficult in this workout in my opinion. So i just wanted to share.