Division of Health Promotion and Exercise, National Institute of Health and Nutrition, Tokyo, Japan.
Int J Sports Med. 2013 Jan;34(1):56-61. doi: 10.1055/s-0032-1316316. Epub 2012 Aug 17.
This study aimed to examine and compare the trunk muscularity of track and field throwers and non-athletes, and its predictive value to the physical performance of the athletes. Using a magnetic resonance imaging method, the skeletal muscle volume (SMV) of the trunk (SMV(trunk)) was determined in 19 strength trained athletes and 18 non-athletes. Also, the SMV of upper, middle and lower regions of the trunk was calculated in every 33% of the trunk length. For the athletes, the maximum weight (1RM) of squat, high clean, and deadlift, and shot forward throwing score were measured. The SMV(trunk) in the athletes was 10% greater than that of non-athletes, with a larger difference in the upper region of the trunk. Step-wise multiple regression analysis indicated that the SMV of the lower region was a significant contributor for predicting the 1RM values of the 3 tasks, as well as the shot forward throwing score. The current results indicate that, while the muscularity of the trunk in track and field throwers is characterized by predominant development in the upper region, the muscularity in the lower region is a determinant factor for the 1RM values of the squat, high clean, and deadlift and shot forward throwing score.
本研究旨在检查和比较田径投掷运动员和非运动员的躯干肌肉发达程度，以及其对运动员身体表现的预测价值。使用磁共振成像方法，确定了 19 名力量训练运动员和 18 名非运动员的躯干骨骼肌肉量（SMV）。此外，还计算了躯干长度每 33%处的上、中、下区域的 SMV。对于运动员，测量了深蹲、高翻和硬拉的最大重量（1RM）和铅球前抛得分。运动员的躯干 SMV 比非运动员大 10%，上躯干的差异更大。逐步多元回归分析表明，下区域的 SMV 是预测 3 项任务 1RM 值以及铅球前抛得分的重要贡献因素。目前的结果表明，虽然田径投掷运动员的躯干肌肉发达程度以中上区域为主，但下区域的肌肉发达程度是深蹲、高翻和硬拉 1RM 值以及铅球前抛得分的决定因素。
