Theraband FlexBar® improves and strengthens the arm, hand and shoulder. Ideal for flexing, twisting or oscillating. FlexBar's color resistance levels are suitable for improving the elasticity and strength of the forearm at all ages, from young people to the elderly and even elite athletes. Available in four levels of progressive resistance Using FlexBar to do the exercise Tyler Twist has been clinically proven to reduce elbow pain by 81% and increase strength in 72% for patients with tennis elbow FlexBar has an easy to grip texture with grooves for comfortable use during flexion, twisting and oscillation movements Ideal for treating the elbow of tennis player or golfer's elbow has been proven to eliminate pain and provide an effective, non-surgical option for increasing strength and endurance.Thera-Band FlexBar is 12″ long and is made from dry natural rubber in 4 progressive resistance levels to match user capability.