Tennis Elbow is famously resistant to treatment. Over the years people have advocated stretching, manipulation, ultrasound, cortisone injections and even surgery. None of these were successful in treating a significant proportion of the population although each has helped in some cases.
Tennis elbow is not a wrist condition as the inflammation is at the common extensor muscle origin at the elbow. These muscles do however move the wrist and fingers.
The latest research has identified eccentric exercises as the most effective treatment, suitable for even stubborn chronic cases. They are very cost effective as with a single piece of exercise equipment costing less than $20 this condition can be treated.
This new treatment has been reported in the New York Times and is detailled in my hub: