QUICK 4 MINUTE WORKOUTThe world's fastest workout
Get a complete full body workout in 4 minutes with this free app. Quick 4 is based on the popualar Tabata Protocol, a regimen originally used by Japanese Olympic athletes. Tabata workouts are 5 times more effective than traditional cardio workouts. It consists of 8 cycles with 20 seconds of exercise and 10 seconds of rest.