青少年一英里跑/走成绩与年龄相关改善的代谢决定因素。
Metabolic determinants of the age-related improvement in one-mile run/walk performance in youth.
作者信息
Cureton K J, Sloniger M A, Black D M, McCormack W P, Rowe D A
机构信息
Department of Exercise Science, University of Georgia, Athens 30602-3654, USA.
出版信息
Med Sci Sports Exerc. 1997 Feb;29(2):259-67. doi: 10.1097/00005768-199702000-00015.
We examined the metabolic determinants of the age-related improvement in 1-mile run/walk (MRW) performance in boys and girls. Treadmill VO2peak (ml.kg-1.min-1), running economy (VO2 in ml.kg-1.min-1 at 8 km.h-1; VO2econ), and %VO2peak used during a simulated MRW were determined in 92 boys and 53 girls, 7-17 yr of age. Simple linear regression analyses indicated that MRW time decreased 0.52 min.y-1, VO2econ decreased 1.0 ml.kg-1.min-1.y-1, %VO2peak increased 1.5%.y-1, and no significant change occurred in VO2peak. Multiple linear regression analyses indicated that the increase in %VO2peak used during the run accounted for about 42% of the decrease in MRW time with age. With the effects of VO2peak and %VO2peak held constant, the improvement in VO2econ accounted for an additional 31% of the age-related decrease in MRW time. We conclude that the age-related improvement in MRW performance in youth is explained primarily by an increase in the %VO2peak used during the MRW and improvement in VO2econ. Age-related changes in MRW time should not be used to infer changes in VO2peak.
我们研究了男孩和女孩1英里跑/走（MRW）成绩随年龄增长而提高的代谢决定因素。对92名男孩和53名7至17岁的女孩测定了跑步机上的最大摄氧量（VO2peak，ml·kg⁻¹·min⁻¹）、跑步经济性（8 km·h⁻¹时的摄氧量，ml·kg⁻¹·min⁻¹；VO2econ）以及模拟MRW过程中使用的最大摄氧量百分比（%VO2peak）。简单线性回归分析表明，MRW时间每年减少0.52分钟，VO₂econ每年下降1.0 ml·kg⁻¹·min⁻¹，%VO₂peak每年增加1.5%，而VO₂peak无显著变化。多元线性回归分析表明，跑步过程中使用的%VO₂peak增加约占MRW时间随年龄下降的42%。在VO₂peak和%VO₂peak的影响保持不变的情况下，VO₂econ的改善又占MRW时间随年龄下降的31%。我们得出结论，青少年MRW成绩随年龄增长而提高主要是由于MRW过程中使用的%VO₂peak增加以及VO₂econ的改善。不应根据MRW时间的年龄相关变化来推断VO₂peak的变化。
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