Guest Jimb59 Posted January 15, 2012 Report Posted January 15, 2012 In the upcoming P90X2 and one of the most fascinating and revolutionary elements is included in P90X2 Upper and Lower workouts. Now, this is going to be new to most of you even some that are more advanced athletes, but the science behind this concept is valid and tested and when applied, can improve your own workout performance to a level you never thought possible.
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