Pitching Mound Height May Influence Elbow And Shoulder Injuries
Research led by the head team physician for the Milwaukee Brewers has shown that the height of a pitcher’s mound can influence the risk of stress-ralated elbow and shoulder injuries.
The researchers used a motion analysis system that included 8 digital cameras and reflective markers placed on each athelete. They used these tools to analyze the pitching motion at mound heights of 10-inches (regulation height), 8-inches, and 6-inches, and 0-inches (flat ground). The study used 20 pitchers from Major League Baseball organizations and Milwaukee-area NCAA Division 1-A teams.
Along with pitching motion and velocity, the researchers also analyzed the forces and torques at the shoulder and elbow. They found that a 10-inch mound caused more stress on the shoulder joint and surrounding structures when compared to flat ground.
The researchers do not suggest a mound height change on this data alone; however, they note that this study cause pitchers to practice more often on flat ground, especially after an injury.
Reference: MedLine Plus
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As an ex high school and college chucker I can tell you that mound size, width, height, etc….mattered. Unfortunately as being a guy without a 90 mph fastball I relied on junk. As such, it seemed anyways…a higher mound was better for my spinning stuff. Makes some sense as to why my arm is a shadow of it’s former self. Also makes sense why the shorter mounds or flat ground left me less than average or adequate. Interesting post. Thanks!
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Thanks for the response, Tommy. It is certainly an interesting study, but I doubt that Major League Baseball will change the mound height anytime soon.
There is no doubt that the higher the mound, the more stress…after all, you are throwing down a hill…think of sprinting on flat ground vx. a steep hill, the joints will get more of a “pounding” on the steeper slope. The problem with too many youth mounds is that they are not well manicured, so evem a 10 inch mound may be closer to 6 inches when you consider the steep hole in front of the rubber. While “flat ground” may be less stressful, it is also different mechanics…you are landing sooner and you are not going down a hill. So you are comparing apples to oranges. To work on your pitching you need to throw off a mound…to work on your arm you can throw from flat ground…but make no mistake about it, it’s two different actions and one does not make the other better.
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