He works in mysterious ways.

I was channel-surfing early one morning when images of sculpted bodies working out together caught my attention. It wasn't the first time I had seen this Insanity infomercial, but it was the first ...

Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? Okay, doing a workout literally called "Insanity" doesn't really sound fun.

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 ...