If you need a reminder of how incredibly popular the Insanity workout — a super-hard, DVD-based workout created by celebrity fitness trainer and choreographer Shaun T— was back in the late 2000s, how ...
I trained with Chris Heria for 24 hours straight, and it was easily one of the hardest fitness days of my life. From calisthenics combos to insane core routines, he pushed me past every limit I had.