Park, Jin-Young
(Global Center for Shoulder, Elbow & Sports at Neon Orthopaedic Clinic)
,
Lee, Seung-Jun
(Department of Orthopaedic Surgery, Pusan National University Yangsan Hospital, Pusan National University School of Medicine)
,
Kim, Yong-Il
(LG Twins Baseball Club)
,
Heo, Gu-Yeon
(Baseball Development Executive Committee, Korea Baseball Organization)
Background: To investigate how many rookie pitchers suffered from injuries while playing in the amateur league without guidelines for prevention of excessive pitching, we analyzed their amateur pitching patterns based on the pitch count, use of breaking balls, and pitches during winter camp. Methods...
Background: To investigate how many rookie pitchers suffered from injuries while playing in the amateur league without guidelines for prevention of excessive pitching, we analyzed their amateur pitching patterns based on the pitch count, use of breaking balls, and pitches during winter camp. Methods: Forty-one rookie pitchers who graduated from high school or university in 2013 and joined professional baseball teams. Participants were interviewed by a trainer using our questionnaire. Injury inclusion criteria were 1) history of shoulder surgery, 2) history of elbow surgery, 3) shoulder pain requiring treatment, and 4) elbow pain requiring treatment. Results: Mean number of pitches per game and warm-up pitches for practice was 84.5 pitches (range, 15 to 130 pitches) and 16.4 pitches (range, 2 to 210 pitches), respectively. Mean number of pitches during the last year was 906.9 (range, 80 to 2,000). Mean number of maximal pitches was 127 pitches (range, 50 to 210 pitches). Fourteen pitchers had pitched over 150 pitches. Twenty-seven pitchers (65.9%) had pitched in spite of enduring pain. During winter training (mean 1.8 months), mean number of pitches per day was 162.5 pitches, and 20 pitchers (48.8%) had practiced pitching excessively despite the cold weather. Twenty-six rookies (63.4%) had shoulder pain or history of shoulder surgery, and 31 pitchers (75.6%) had elbow pain or history of elbow surgery. Only four participants (9.8%) did not have pain and history of surgery. Conclusions: For young baseball pitchers, guidelines for prevention of excessive pitching and for regulating the winter training program may be needed.
Background: To investigate how many rookie pitchers suffered from injuries while playing in the amateur league without guidelines for prevention of excessive pitching, we analyzed their amateur pitching patterns based on the pitch count, use of breaking balls, and pitches during winter camp. Methods: Forty-one rookie pitchers who graduated from high school or university in 2013 and joined professional baseball teams. Participants were interviewed by a trainer using our questionnaire. Injury inclusion criteria were 1) history of shoulder surgery, 2) history of elbow surgery, 3) shoulder pain requiring treatment, and 4) elbow pain requiring treatment. Results: Mean number of pitches per game and warm-up pitches for practice was 84.5 pitches (range, 15 to 130 pitches) and 16.4 pitches (range, 2 to 210 pitches), respectively. Mean number of pitches during the last year was 906.9 (range, 80 to 2,000). Mean number of maximal pitches was 127 pitches (range, 50 to 210 pitches). Fourteen pitchers had pitched over 150 pitches. Twenty-seven pitchers (65.9%) had pitched in spite of enduring pain. During winter training (mean 1.8 months), mean number of pitches per day was 162.5 pitches, and 20 pitchers (48.8%) had practiced pitching excessively despite the cold weather. Twenty-six rookies (63.4%) had shoulder pain or history of shoulder surgery, and 31 pitchers (75.6%) had elbow pain or history of elbow surgery. Only four participants (9.8%) did not have pain and history of surgery. Conclusions: For young baseball pitchers, guidelines for prevention of excessive pitching and for regulating the winter training program may be needed.
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제안 방법
2 years (range, 20 to 25 years). All participants were interviewed using our questionnaire, which included questions about pitch count, pitch inning, fastball velocity, use of breaking balls, history of catcher, winter training camp, history of shoulder and elbow surgery, and current status of the shoulder and elbow. Current status of the shoulder and elbow was recorded by a team trainer, and the other questions were designed by the participants.
Both mean fastball velocity in the last year and maximal fastball velocity in the last year and at all times were recorded. To investigate the use of breaking balls, frequency of breaking balls, starting age, and the duration of breaking ball pitching were recorded. Injury inclusion criteria included 1) history of shoulder surgery, 2) history of elbow surgery, 3) shoulder pain requiring treatment, and4) elbow pain requiring treatment.
대상 데이터
This study received approval from the Konkuk University Hospital Institutional Review Board (KUH1060083). Forty-one participants who were rookie professional baseball pitchers who graduated from high school or university in 2013 and joined eight out of nine professional baseball teams in Korea were enrolled in this study. The mean age was 22.
6%) experienced elbow pain or were diagnosed with elbow disorders. Twenty-seven participants underwent MRI, and there were 19 cases of medial ulnar collateral ligament tear, 6 cases of loose bodies, and 16 cases of valgus overload syndrome with olecranon spur. Among these 27 rookies, 17 participants had a history of operation; medial ulnar collateral ligament reconstruction in 12 cases and arthroscopic surgery in 9 cases.
데이터처리
A paired t-test was used for comparison of injury rate with participants’ factors.
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