Powter made millions with her 'Stop the Insanity!' fitness infomercial in the '90s, but lost it all. Curtis, who's producing a documentary on Powter, helped renew the fitness guru's faith Courtesy ...

While fitness icon Susan Powter lost millions throughout her career, other stars such as Jane Fonda, Suzanne Somers and more thrived as workout gurus throughout the '80s and '90s.

infomercials spawned a fitness empire that put her on the map. But Powter, who is now 66, revealed that she fell on hard times after her television career ended, forcing her to deliver food for ...

Overly-caffeinated workout gurus, a boxing champ turned grillmaster, and the "Free Money Guy." They were all once fixtures of late-night TV, hawking products to bleary-eyed viewers. So, where did they ...