I just started the 'official' month 2 of Insanity today (last week was the 'recovery week' workouts in between the two months).
What. The. Hell.
It went from like 90 to 200 in terms of difficulty and intensity. I was not prepared for that kind of a leap. Also didn't help that they pair two workouts - the fit test and the max interval back to back on you.
Then I had a tennis match with a buddy of mine tonight and my legs, well, they didn't come with me to the courts. Month 1 was difficult enough balancing this and tennis, but manageable. I have no idea what I'm going to do about this Month 2 plus two leagues that I'm now in.