I am currently into my second week of P90X and it is absolutely brutal. As I have stated in some previous posts, P90X is easily the mosthour you could possibly do.
Saying that, I have had a lot of trouble finishing some of the workouts, and if I did finish them, I wasn't using proper form by the end of the workout. After my workouts, I was completely spent, and could barely stand up (which is why this program works so well haha)
I started sipping on 3 scoops of about 20 minutes before my Shoulders and Arms workout. I have never felt like that during a P90X workout, or any other workout. My arms never got tired. I was doing the same amount of weight on the 3rd round through as I was doing on the 1st round. I felt like I could just keep on lifting no matter how much weight it was, or how many reps I did.
I am sitting at my computer right now and my arms still feel like I could go do the workout again. If anyone is looking for pre/during/post energy and supplement I would strongly suggest . I feel great, and won't do another P90X workout without it.
I am also taking and Slime Xtreme during my cut, and I am honestly seeing extreme results from just 9 days of supplementation and P90X. I will get picks up soon, and I don't even believe how my body could change so much in 9 days.