P90X, or Power 90 Extreme, is a exercise regimen designed to take 90 days, and consists of a training program that uses cross-training and periodization, combined with a nutrition and dietary supplement plan.

Insanity is a total body workout that requires no gym or equipment. You exercise right at home, using your own body weight for resistance. The program is based on afitness method called "max interval training.

Tabata training is one of the most popular forms of high-intensity interval training (HIIT). It consists of eight rounds of ultra-high-intensity exercises in a specific 20-seconds-on, 10-seconds-off interval.