Bunc V, Heller J
Sekce vrcholového sportu Výzkumného ústavu tĕlovýchovného, Univerzity Karlovy, Praha.
Cas Lek Cesk. 1990 Jan 19;129(3):85-7.
The utilizable sources of energy of the human organism are relatively restricted where by interindividual differences are not substantial, while differences in physical performance are extreme. The capacity to transform chemical energy into mechanical work, sometimes described also as the work capacity of the organism is evaluated by means of mechanical efficiency--ME. In men with varying amounts of training (incl. untrained ones), differing significantly as to the percentage of body fat (3.8-17.2%), assessed by measurement of ten skinfolds, the authors assessed ME on a treadmill. The highest ME values were recorded in trained sportsmen (endurance runners--32.4%), lowest in untrained middle-aged men (16.9%). The authors found a close negative correlation of ME and maximal oxygen consumption per kg body weight and values of body fat percentage. With the increasing percentage of body fat the values of ME decline, the prerequisites for effective transformation of chemical energy of the organism into mechanical work are reduced and the work capacity of the organism declines.
人类机体可利用的能量来源相对有限，个体间差异不大，而体能差异却极为显著。将化学能转化为机械能的能力，有时也被描述为机体的工作能力，是通过机械效率（ME）来评估的。作者对不同训练程度（包括未受过训练的人）、通过测量十个皮褶评估的体脂百分比差异显著（3.8%-17.2%）的男性，在跑步机上评估了ME。ME的最高值出现在训练有素的运动员身上（耐力跑运动员——32.4%），最低值出现在未受过训练的中年男性身上（16.9%）。作者发现ME与每千克体重的最大耗氧量以及体脂百分比值呈密切的负相关。随着体脂百分比的增加，ME值下降，机体将化学能有效转化为机械能的前提条件减少，机体的工作能力也随之下降。
