Markovic Goran, Vucetic Vlatko, Nevill Alan M
Faculty of Kinesiology, Department of Kinesiology of Sport, University of Zagreb, Croatia.
Ann Hum Biol. 2007 May-Jun;34(3):315-28. doi: 10.1080/03014460701219358.
The present study analysed the allometric relationship (MR = a . M(b)) between human metabolic rate (MR), ranging from resting to maximal metabolic conditions, and body mass (M ), both in athletes of different specialization and untrained individuals.
Two hundred and seventy male athletes and 43 untrained men performed a continuous incremental test to volitional exhaustion on a motorized treadmill. Metabolic rate (i.e. VO2) was measured during resting (VO2REST), sub-maximal (walking at 5 km h(-1) VO2WALK; running at 7.5 km h(-1) VO2RUN; ventilatory anaerobic threshold VO2VT) and maximal exercise conditions (maximum oxygen uptake VO2MAX).
A significant difference (p < 0.001) in the MR-body mass relationships between athletes and controls was found. For the control group, the mass exponent b exhibited a non-significant (p = 0.37) increase with increasing metabolic demand (b = 0.69, 0.76, 0.76, 0.84, and 0.89, for VO2REST, VO2WALK, VO2RUN, VO2VT, and VO2MAX, respectively). In contrast, the corresponding mass exponent for the athletic group significantly (p < 0.01) decreased when moving from resting to maximal metabolic conditions (b = 0.98, 0.88, 0.80, 0.69, and 0.67).
These results indicate that the recently proposed allometric cascade model may be valid in describing the scaling behaviour of MR in untrained individuals, but not in athletes of different specialization.
本研究分析了从静息到最大代谢状态下，不同专项的运动员和未受过训练的个体的人体代谢率（MR）与体重（M）之间的异速生长关系（MR = a·M(b)）。
270名男性运动员和43名未受过训练的男性在电动跑步机上进行持续递增运动试验直至自愿力竭。在静息（VO2REST）、次最大运动（以5 km/h步行VO2WALK；以7.5 km/h跑步VO2RUN；通气无氧阈VO2VT）和最大运动状态（最大摄氧量VO2MAX）下测量代谢率（即VO2）。
发现运动员和对照组之间MR与体重关系存在显著差异（p < 0.001）。对于对照组，随着代谢需求增加，质量指数b呈非显著（p = 0.37）增加（VO2REST、VO2WALK、VO2RUN、VO2VT和VO2MAX时的b分别为0.69、0.76、0.76、0.84和0.89）。相反，运动员组从静息到最大代谢状态时，相应的质量指数显著（p < 0.01）下降（b分别为0.98、0.88、0.80、0.69和0.67）。
这些结果表明，最近提出的异速生长级联模型可能适用于描述未受过训练个体的MR标度行为，但不适用于不同专项的运动员。
