高强度次最大强度运动（无论有无休息）对后续最大摄氧量的影响。

Effect of high-intensity submaximal work, with or without rest, on subsequent VO2max.

作者信息

Judelson Daniel A, Rundell Kenneth W, Beck Kenneth C, King Timothy M, Laclair Kerry L

机构信息

Coaching and Sports Sciences Division, United States Olympic Committee, Lake Placid, NY, USA.

出版信息

Med Sci Sports Exerc. 2004 Feb;36(2):292-6. doi: 10.1249/01.MSS.0000113480.21438.A8.

DOI:10.1249/01.MSS.0000113480.21438.A8

PMID:14767253

Abstract

PURPOSE

In practice, tests of maximal oxygen uptake (.VO2max) are often preceded by a lactate profile, a highly intense but submaximal exercise bout. The .VO2max response to preceding high-intensity submaximal exercise, with or without a rest period, has not been determined. If .VO2max is limited after a lactate profile, exercise-induced hypoxemia (EIH) may explain the deficit. The purposes of this study were to: 1) examine the effects of high-intensity submaximal exercise, with or without rest, on subsequent .VO2max; and 2) evaluate the role of EIH in causing any observed changes.

METHODS

Ten healthy, well-trained, male cross-country skiers (age = 20.5 +/- 4.7 yr, height = 181.6 +/- 6.0 cm, mass = 72.1 +/- 5.7 kg) completed three exercise trials: an incremental run to fatigue (MAX), MAX preceded by a high-intensity submaximal run (lactate profile) and a 20-min rest period (discontinuous protocol [DC]), and MAX preceded by a high-intensity submaximal exercise run with no rest (continuous protocol [C]). .VO2max, minute ventilation, and arterial oxygen saturation were measured throughout, and diffusion capacity was evaluated 2 min postexercise. RESULTS No significant between trial differences were observed, although the difference between .VO2max determined during the MAX trial (62.7 +/- 6.7 mL.kg-1.min-1) and during the DC trial (58.3 +/- 4.4 mL.kg-1.min-1) approached significance (P = 0.059). DC .VO2max responses could be separated into two groups: five responders whose .VO2max suffered during the DC trial (decreased >7.5% from MAX) and five nonresponders, whose .VO2max was unaffected by preceding submaximal exercise and a rest period. Responders showed greater aerobic capacity during the MAX trial.

CONCLUSION

.VO2max is significantly reduced in approximately 50% of cross-country skiers when a maximal exercise test is preceded by high-intensity submaximal exercise and a 20 min rest period; the role of EIH in causing these reductions is unclear.

摘要

目的

在实际操作中，最大摄氧量（.VO2max）测试之前通常会进行乳酸曲线测试，这是一次高强度但次最大强度的运动。此前高强度次最大强度运动（无论有无休息期）对.VO2max的影响尚未确定。如果在乳酸曲线测试后.VO2max受限，运动性低氧血症（EIH）可能解释这一不足。本研究的目的是：1）研究有无休息的高强度次最大强度运动对后续.VO2max的影响；2）评估EIH在导致任何观察到的变化中的作用。

方法

10名健康、训练有素的男性越野滑雪运动员（年龄 = 20.5 ± 4.7岁，身高 = 181.6 ± 6.0厘米，体重 = 72.1 ± 5.7千克）完成了三项运动试验：递增跑至疲劳（MAX）、在MAX20 MAX之前先进行高强度次最大强度跑（乳酸曲线测试）和20分钟休息期（间断方案[DC]），以及MAX之前先进行无休息的高强度次最大强度运动跑（连续方案[C]）。全程测量.VO2max、分钟通气量和动脉血氧饱和度，并在运动后2分钟评估弥散能力。结果：尽管MAX试验期间（62.7 ± 6.7毫升·千克-1·分钟-1）和DC试验期间（58.3 ± 4.4毫升·千克-1·分钟-1）测定的.VO2max之间的差异接近显著性（P = 0.059），但试验之间未观察到显著差异。DC试验的.VO2max反应可分为两组：五名反应者，其.VO2max在DC试验期间下降（比MAX下降>7.5%），五名无反应者，其.VO2max不受先前次最大强度运动和休息期的影响。反应者在MAX试验期间显示出更大的有氧能力。