The Original and Number One Selling Exercise Band Worldwide. TheraBand® brand products comprise the world’s leading line of progressive elastic resistance exercise products for professional rehabilitation and wellness. TheraBand resistive exercisers have been clinically proven in use for over 30 years to improve strength, range of motion, balance, and functional activities in many different patient populations. Great for hand therapy and upper extremity strengthening activities. Follows the TheraBand® System of Progression.