I've done p90x, p90x+, insanity, spartacus workout, spartacus workour 2.0. What other workout is really challenging. I know I COULD make my own workout, but I want to find out if there are any others you guys find challenging before I start making my own.
Answer on What are some hardcore workouts?
Crossfit and their philosophy of working out is pretty darn intense. I've done P90X and enjoyed it... But i find that crossfit is more "real world" oriented and i enjoy it more.
Check out some youtube videos and get some ideas from there... I do this when I start to plateau and i want a change