P90X: Core Synergistics
Core Synergistics is one of the toughest total body workouts (at least, it feels like one!) in the P90X system. It was roughly 1 hour long and focused on strengthening multiple muscle groups to build and support core muscles. I can’t provide too much detail here because I paid for it and I’m sure they wouldn’t want me spilling all of their secrets. But essentially, we worked through a series of lunges, squats, push-ups and abdominal moves until we achieved muscle failure (in other words, I could not eke out another rep because I was wiped).
By the time I was finished, I was covered in sweat and feeling as though I worked as hard as I would on any old cardio machine. That was the best moment for me because I typically don’t feel I’ve gotten enough of a workout without getting on a cardio machine.