Wickkiser J D, Kelly J M
Med Sci Sports. 1975 Fall;7(3):199-202.
The body composition and anthropometric measurements of 65 college football players were studied. Body composition was determined by underwater weighing with an accurate assessment of residual volume. The anthropometric measurements included height, weight, seven skinfolds, waist circumference and wrist diameter. A step-wise multiple regression analysis of the data indicated that body density and body fat could be predicted from anthropometric measurements. A multiple correlation of .96 was found between body density and three independent variables (waist circumference, triceps skinfold and height). The derived regression equations' standard errors of the estimate were 0.0041 body density units and 1.64 percent fat respectively. The team data were divided into five categories by position. When subjected to analysis of variance, significant differences at the .01 level of confidence suggested that at least two separate groups, backs and linemen, be used in future body composition studies of football teams. The estimated optimal playing weights of each player were determined by densitometry, and each player and the coach estimated that their optimal weights through personal experience. It was found that the players and the coach estimated the players optimal mean weight by 9 and 6 pounds heavier, respectively, than the densitometric analysis indicated as optimal.
对65名大学橄榄球运动员的身体成分和人体测量数据进行了研究。身体成分通过水下称重法测定，并精确评估残气量。人体测量数据包括身高、体重、七处皮褶厚度、腰围和腕径。对数据进行的逐步多元回归分析表明，身体密度和体脂可以通过人体测量数据进行预测。发现身体密度与三个自变量（腰围、肱三头肌皮褶厚度和身高）之间的复相关系数为0.96。推导得到的回归方程的估计标准误差分别为0.0041个身体密度单位和1.64%的体脂率。团队数据按位置分为五类。进行方差分析时，在0.01置信水平上的显著差异表明，在未来橄榄球队的身体成分研究中，至少应使用两个不同的组，即后卫和前锋。通过密度测定法确定了每名运动员的估计最佳比赛体重，每名运动员和教练通过个人经验估计了他们的最佳体重。结果发现，运动员和教练估计的运动员最佳平均体重分别比密度测定分析显示的最佳体重重9磅和6磅。
