研究背景：棒球運動是一項熱門的運動，依據美國的統計資料，每年參與棒球運動的青少年發生傷害的比率約在2~8%之間。但長期以來，國內對於棒球傷害的調查缺乏前瞻式的長期追蹤報告，多屬於回溯性的研究。研究目的：本研究之目的是以前瞻性方式，追蹤高中棒球選手發生運動傷害之比率及相關危險因素。研究方法：本研究是以前瞻性流行病學調查研究方式進行，資料收集期間從2005年2月至2006年2月，以中部某高中棒球隊選手作為研究對象。傷害判別方式以醫師之正式診斷與檢查為依據，包括理學檢查、X光攝影、神經傳導速度檢查、肌電圖檢查、及軟組織超音波檢查等。結果：資料收集期間包含平常一般訓練與參加六次全國性比賽。比賽期間總共發生傷害次數為102次；平日練習時間運動傷害發生次數為60次。比賽期間較平日訓練時間發生傷害之次數多(χ^2(下标 (1))=10.89, p<.001)，且不同時期之受傷部位與受傷型態也有不同(χ^2(下标 (15))=27.17, p=.027; χ^2(下标 (8))=31.44, p<.001)。以受傷部位而言，手肘的傷害發生最多，佔18.5%。就運動傷害之受傷型態來看，以肌肉及肌腱拉傷發生最多，佔34.6%，撞傷居次為18.5%。守備位置與傷害型態有顯著差異(χ^2(下标 (24))=55.396, p<.001)；平均每個人受傷次數以外野手最多，其次為投手。結論：傷害調查顯示，大多為外在危險因素所造成，且多為輕度傷害。比賽期間運動強度高於平日練習，較容易導致受傷；其中傷害部位以手肘居多，應注意青棒選手手肘傷害的預防及治療。傷害型態以肌肉及肌腱拉傷發生最多，需要多加強選手的柔軟度及協調性訓練；另外除了注意投手的保護之外，也要注意外野手的傷害情形。

Background: Baseball has been a popular sport in Taiwan. The incidence of baseball-related injuries for Adolescents was between 2%-8%. Previous studies were revealed that the most common two injuries were shoulder and elbow joint. However, few studies about the baseball injuries survey have used prospective method. Objective: The purpose of this study was to collect the sports injuries in senior high school baseball team and to document injury onset, location, type, and risk factors for one-year follow-up. Methods: This was a prospective, epidemiological study. The sports injuries were recorded from February, 2005 to February, 2006. Participants were 36 baseball players recruited from Senior High School in mid-Taiwan. This study was evaluated and diagnosed by physical examinations, X-ray, electrophysiological examination, and soft tissue ultrasound examination. Results: Overall there 60 injuries were onset on practice and 102 injuries were onset at competition periods. There had significantly difference between competition and practice at frequency of injuries onset (χ^2(1)=10.89, p=.00l). It also showed significantly difference between timing of injuries onset and injury locations and timing of injuries onset and injuries types (χ^2(15)=27.17, p=.027; χ^2(8)=3l.44, p<.001). The elbow was the most frequency complaint (18.5%). The most common type of injury was muscle strain (34.6%), followed by contusion (18.5%). Conclusion: The results indicated that (1) more injuries were emerged in competitive period; (2) elbow/forearm was the most injuries area in adolescent players; (3) the muscle strain/tendonitis often appeared. The players needed to improve their muscle extensibility. Further study will be needed to record and compare the injury rate at different sports level for baseball team to provide information to the coaches and clinicians.