最大摄氧量、方案持续时间和摄氧量平台期。

VO2max, protocol duration, and the VO2 plateau.

作者信息

Yoon Byung-Kon, Kravitz Len, Robergs Robert

机构信息

Exercise Physiology Laboratories, Exercise Science Program, The University of New Mexico, Albuquerque, NM 87131-1251, USA.

出版信息

Med Sci Sports Exerc. 2007 Jul;39(7):1186-92. doi: 10.1249/mss.0b13e318054e304.

DOI:10.1249/mss.0b13e318054e304

PMID:17596788

Abstract

PURPOSE

The purpose of this study was to compare VO2max, VO2-time slopes at the end of the protocol (last 30 s), and the presence of a VO2 plateau (VO2-time slope < 0.05 L.min(-1) during the last 30 s) across four protocol durations (5, 8, 12, and 16 min) during incremental cycling exercise to VO2max.

METHODS

Eight male (23.8 +/- 3.2 yr) and eight female (26.0 +/- 8.9 yr) subjects of moderate to high fitness levels participated in the study.

RESULTS

VO2max was significantly higher in men than in women for each protocol duration, with main effect means of 4.23 versus 2.84 L.min(-1), respectively. For women, VO2max did not differ between any protocol duration. For men, VO2max for the 8-min protocol (4.44 +/- 0.39 L.min(-1)) was significantly higher than for all other protocol durations. Analysis of covariance, using the highest VO2max as the covariate, removed all protocol-duration significance for men. The VO2 slope for the final 30 s of each test was significantly lower for the 16-min protocol compared with the 5-min protocol, for both men and women. The ventilation threshold across four protocols was similar, at approximately 76% of VO2max for both men and women.

CONCLUSIONS

The protocol duration of tests to VO2max should be between 8 and 10 min for healthy, moderately to highly trained subjects.

摘要

目的

本研究的目的是比较在递增式自行车运动至最大摄氧量（VO2max）过程中，四个方案持续时间（5、8、12和16分钟）下的最大摄氧量（VO2max）、方案结束时（最后30秒）的VO2-时间斜率，以及VO2平台期的存在情况（最后30秒内VO2-时间斜率<0.05 L·min⁻¹）。

方法

八名男性（23.8±3.2岁）和八名女性（26.0±8.9岁），健康水平为中度至高度的受试者参与了本研究。

结果

在每个方案持续时间下，男性的VO2max均显著高于女性，主要效应均值分别为4.23和2.84 L·min⁻¹。对于女性，任何方案持续时间下的VO2max均无差异。对于男性，8分钟方案的VO2max（4.44±0.39 L·min⁻¹）显著高于所有其他方案持续时间。以最高VO2max作为协变量进行协方差分析后，消除了男性方案持续时间的所有显著性差异。对于男性和女性，16分钟方案的每个测试最后30秒的VO2斜率均显著低于5分钟方案。四个方案的通气阈值相似，男性和女性均约为VO2max的76%。