Kukidome T, Shirai K, Kubo J, Matsushima Y, Yanagisawa O, Homma T, Aizawa K
Senshu University 2-1-1 Higashimita, Tamaku, Kawasaki, Kanagawa 214-8580, Japan.
Br J Sports Med. 2008 Oct;42(10):814-8. doi: 10.1136/bjsm.2007.044081. Epub 2008 Apr 2.
Changes in body composition of college wrestlers undergoing rapid weight reduction were evaluated over time using magnetic resonance imaging (MRI).
This study evaluated 12 wrestlers (male, 18-22 years of age) who participated in Japan's 2005 intercollegiate wrestling tournament. For this study, MRI (of the right femoral region and the trunk), as well as measurements of body weight, body fat percentage and body water content, were performed 1 month and 1 week prior to the weigh-in, on the day of the weigh-in, on the day of the match (after the match), and 1 week after the weigh-in. A survey of food and fluid intake was also conducted.
Several variables were significantly lower on the day of the weigh-in than one month prior: body weight (p<0.01, -7.3% (SD 1.6%)); body fat (p<0.05, -9.3 (5.8)%); body water content (p<0.01, -5.9 (1.6)%); trunk cross-section (p<0.01, -13.2 (4.4)%), including separate measurements of trunk viscera, trunk muscle, and trunk fat; quadriceps muscle; lower subcutaneous; and food intake (p<0.01, 122 (20)). At 1 week after the match, all metrics had recovered to their levels measured 1 month before the weigh-in. Certain variables that were highly sensitive to hydration recovered more rapidly: they had reached their initial levels when measured immediately after the match.
Rapid weight reduction reduced the wrestlers' cross-sectional areas of muscle and fat tissues, which tended to recover through rehydration after the weigh-in. These results suggest that rapid weight reduction of wrestlers induced changes in different regions of the body.
采用磁共振成像（MRI）对快速减重的大学摔跤运动员的身体成分变化进行长期评估。
本研究评估了12名参加2005年日本大学间摔跤锦标赛的摔跤运动员（男性，18 - 22岁）。在称重前1个月和1周、称重当天、比赛日（比赛后）以及称重后1周，对这些运动员进行了右大腿区域和躯干的MRI检查，同时测量了体重、体脂百分比和身体水分含量。还进行了食物和液体摄入量的调查。
称重当天的几个变量显著低于称重前1个月：体重（p<0.01，-7.3%（标准差1.6%））；体脂（p<0.05，-9.3（5.8）%）；身体水分含量（p<0.01，-5.9（1.6）%）；躯干横截面积（p<0.01，-13.2（4.4）%），包括躯干内脏、躯干肌肉和躯干脂肪的单独测量；股四头肌；下皮下脂肪；以及食物摄入量（p<0.01，122（20））。比赛后1周，所有指标均恢复到称重前1个月测量的水平。某些对水合作用高度敏感的变量恢复得更快：在比赛后立即测量时已达到初始水平。
快速减重减少了摔跤运动员肌肉和脂肪组织的横截面积，这些横截面积在称重后通过补水往往会恢复。这些结果表明，摔跤运动员的快速减重会引起身体不同部位的变化。
