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n International SportMed Journal - Recovery from hamstring injuries in Major League Baseball players : original research article
Background: Hamstring injuries in Major League Baseball result in man-games lost and medical costs that impact the player and team.
Research question: How does a hamstring injury affect a baseball player's subsequent performance?
Type of study: Descriptive study.
Methods: Major League Baseball players (non-pitchers) with a hamstring injury were identified over four seasons. Demographic data and days on the disabled list were recorded. Games played and at-bats were analysed for 2 seasons before injury, the season of injury, and 2 seasons following injury.
Results: Mean age was 30.7 ± 4.1 years (range, 21 to 39). Mean days on the disabled list was 15.9 ± 5.9 days. Games played for each season before injury were significantly greater than for the season of injury (p = 0.002 and p = 0.003 respectively). Games played for each season following injury were not significantly different than for the season of injury (p = 0.262 and p = 0.083 respectively). At-bats for each season before injury were significantly greater than the season of injury (p = 0.010 and p = 0.007 respectively). At-bats for each season following injury were not significantly different than the season of injury (p = 0.263 and p = 0.074 respectively). Seventeen players played one or less seasons after injury.
Conclusions: Most players with hamstring injuries returned to their same level following injury. However, this study identified a subset of players where a hamstring injury heralds the end of their career. These results can guide future preventive and rehabilitation protocols of hamstring injuries.
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