The incidence of abdominal muscle strains in baseball has been increasing over the past 20 years, especially early in the season, and there is a relatively high reinjury rate. This upward trend is in spite of new and more advanced diagnostic procedures, preventive core strengthening exercise programs, and rehabilitation techniques. Injuries contralateral to the dominant arm or batting side are more common.
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Seelig et al. (1998) studied this question.
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