Patent attributes
Wireless game controller can provide variable resistance during strength training exercise and is coupled with off the shelf video gaming system such as Nintendo WII or personal computer by bluetooth or WiFI connection. The resistance is provided by a motor/generator. Electrical recuperation occurs between eccentric and concentric steps of the exercise, electrical energy is stored in a super capacitor between the steps. Video gaming system is configurable to run exercise software that provide reinforcing game experience, coaching, and physical therapy to the user. Exercise software tracks user's pose using fiduciary marks on the controller and data from 3d accelerometer embedded in the controller. The resistance is computed as a function of one or more the following: exercise type, position, velocity, user profile, and repetition number.