Level of competition influences overhead athletes' shoulder internal rotation range of motion in the side-lying position

The side-lying position yielded significantly smaller IR ROM values compared to the supine position. The average IR ROM for the side-lying position for the dominant and nondominant shoulder in asymptomatic overhead athletes was 40° and 53°, respectively. National Collegiate Athletic Association DI athletes had a significantly smaller dominant-shoulder side-lying IR ROM value of 35°.