Jillian Michaels and our judges put 3 low impact workouts through the paces with guest judge Kit Hoover.

Interval training workout programs face competition in the search for America’s next fitness phenomenon.

Terrell Owens joins Jillian Michaels and our judges as they try three fan-based workout programs.

Jillian Michaels tests out three of most unusual workouts yet, seeking out a program with mass appeal.

Guest judge Lolo Jones joins Jillian Michaels to find America’s next fitness phenomenon.

Jillian Michaels assesses three innovative group exercise programs.

Jillian Michaels and the judges test three new resistance training programs.

Jillian Michaels and the judges test the stability and viability of three platform fitness devices.

Jillian Michaels, the judges and a panel determine who will be crowned America’s next fitness phenomenon.