REDUCED TRAINING INTENSITIES AND LOSS OF AEROBIC POWER, ENDURANCE, AND CARDIAC GROWTH
REDUCED TRAINING INTENSITIES AND LOSS OF AEROBIC POWER, ENDURANCE, AND CARDIAC GROWTH
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DOI：
10.1152/jappl.1985.58.2.492
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发表时间：
1985-01-01
影响因子：
3.3
通讯作者：
RICH, S
中科院分区：
文献类型：
--
作者：
HICKSON, RC;FOSTER, C;RICH, S
12名受试者参加自行车和跑步40 min/d，6 d/wk的运动计划。10周后，他们继续训练，工作率降低1/3或2/3，再训练15周。额外训练的频率和持续时间与10周训练期间相同。当在训练10周后在骑自行车和跑步机跑步期间测量时，最大O2摄取（≥ VO 2 max）的平均增加在11%和20%之间。在训练强度降低1/3的情况下，VO 2 max不能维持在6天/周的训练水平，但仍高于训练前的水平。在强度降低2/3的情况下，VO 2 max下降的程度甚至大于降低1/3的情况。短期耐久性（约1/3减容组维持5 min），而2/3减容组明显减少。长期耐力在1/3减少组（184-145分钟）中显著降低了21%，在2/3减少组（202-141分钟）中降低了30%。从超声心动图测量获得的计算的左心室质量增加了约15%，但在两组减少训练后恢复到对照水平。训练强度是保持有氧能力和心脏扩大的基本要求，减少训练。其他性能标准，例如短期和长期耐久性没有随着VO 2 max的变化而降低，因此可能受到额外的调节。
Twelve subjects participated in an exercise program of cycling and running 40 min/day, 6 days/wk. After 10 wk, they continued to train with either a 1/3 or 2/3 reduction in work rates for an addidional 15 wk. Frequency and duration for the additional training remained the same as during the 10 wk of training. The average increases in maximum O2 uptake (.ovrhdot.VO2max) were between 11 and 20% when measured during cycling and treadmill running after 10 wk of training. .ovrhdot.VO2max was not maintained at the 6 day/wk training levels with a 1/3 reduction in training intensity but was still higher than pretraining levels. With a 2/3 reduction in intensity, .ovrhdot.VO2max declined to an even greater extent than with the 1/3 reduction. Short-term endurance (.apprx. 5 min) was maintained in the 1/3 reduced group but was markedly reduced in the 2/3 reduced group. Long-term endurance was decreased significantly from training by 21% in the 1/3 reduced group (184-145 min) and by 30% in the 2/3 reduced group (202-141 min). Calculated left ventricular mass, obtained from echocardiographic measurements, increased .apprx. 15% after training but returned to control levels after reduced training in both groups. Training intensity is an essential requirement for maintaining the increased aerobic power and cardiac enlargement with reduced training. Other performance criteria such as short- and long-term endurance were not reduced in parallel with the .ovrhdot.VO2max changes and may, therefore, be under additional regulation.