One of the most demanding activities on the elbow in sports is the baseball pitch. The prevalence of overuse injury to the elbow due to pitching is well docu-mented.12,18-23 Most of these overuse throwing injuries result from repetitive trauma to the elbow. An understanding and application of proper pitching mechanics can help to maximize performance and minimize the potential for injury. Although the baseball pitch is one continuous motion, dividing the motion into phases helps in understanding the elbow biomechanics during pitching. Werner et al. separated the pitch into six phases: windup, stride, arm cocking, arm acceleration, arm deceleration, and follow-through.24 We provide next a description of the biomechanics of the elbow during each phase.
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Since World War II, there has been a tremendous change in the makeup and direction of kid baseball, as it is called. Adults, showing an unprecedented interest in the activity, have initiated and developed programs in thousands of towns across the United States programs that providebr wholesome recreation for millions of youngsters and are often a source of pride and joy to the community in which they exist.