Numerous studies have documented reduced glenohumeral joint range of motion (ROM) of the dominant extremity among baseball players, which may be caused by throwing-related factors that also affect the radioulnar joint.
To measure pronation and supination ROM in competitive baseball pitchers and position players.
Asymptomatic professional and collegiate baseball pitchers (N = 59) and position players (N = 43).
Bilateral radioulnar pronation and supination ROM.
Pitchers demonstrated significantly less pronation and total ROM in the throwing arm than the nondominant arm. The position players demonstrated significantly less total ROM in the throwing arm than the nondominant arm.
The reported normative values may provide useful standards for interpretation of radioulnar ROM measured in both asymptomatic and symptomatic baseball players.
Kevin Laudner is a professor in the School of Kinesiology and Recreation at Illinois State University in Normal, IL.
Robert Lynall is a doctoral candidate and teaching assistant at the University of North Carolina at Chapel Hill.
Jeffrey Williams is an instructional assistant professor at Illinois State University in Normal, IL.
Regan Wong is the director of the Texas Metroplex Institute for Sports Medicine and Orthopedics in Arlington, TX.
Takashi Onuki is a minor league athletic trainer for the Arizona Diamondbacks in South Bend, IN.
Keith Meister is the director of the Texas Metroplex Institute for Sports Medicine and Orthopedics in Arlington, TX, and the head team physician for the Texas Rangers baseball club.