P90X is as popular now as it’s ever been—here’s why it has staying power
Im an Exercise PhysiologistHeres Why You Shouldnt Worry About Cortisol Spikes When You Do HIIT Workouts. Elliptical vs Treadmill: Which Cardio Machine Is Right For You? Does Rowing Count as Strength Training? All it really requires is a mat, and sometimes some weights or a resistance band here and there. How did you come up with the idea of P90X back in 2005? The reason I created it was because there was nothing like it on the market at that point....