20 minutes is all it takes. Try doing a 20-minute workout everyday for a week.

Power 20 is the world’s simplest fitness system. The plyometric workouts app emphases design and usability. Each workout enhances strength, endurance, balance, and muscle tone.

Put your iPhone or iPad on the floor, hit Start, and within seconds you are lunging, jumping, dipping and diving. A foxy guide shows you when to rest and when to move. After the 20 minutes you will be panting, sweating, and smiling.