The Numbers That Actually Protect a Throwing Arm
Most arm injury advice is vague. Don’t overdo it. Listen to your body. Make sure he gets rest. The research is considerably more specific than that. Over the last two decades, sports medicine researchers — particularly the group at the American Sports Medicine Institute, who followed 481 youth pitchers over ten years — have put numbers on which behaviors predict injury and by how much. This article is those numbers. It’s written for parents, coaches, and athletes who want something more actionable than “be careful.”