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“Some of these patients will lose the benefits once we supinate them and then we have to prone them again,” Dr. Gong said.

The UCL is absorbing this stress and keeping the ulnar and humeral bones from unhinging as the arm is going forward with a supinated forearm.

Clark has a congenital problem with his arms in which he can’t supinate his wrists, and the long putter was the perfect solution.

The 38-year-old uses the long putter out of what he says is necessity; a congenital problem with his arms prevents him from supinating his wrists and causes discomfort while using a short putter.

In fact, people whose feet pronated were actually less likely to have had an injury than those who had normal or supinated foot strikes.