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首页> 外文期刊>Journal of Sports Medicine and Physical Fitness >Early effects of short-term aerobic training: Physiological responses to graded exercise
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Early effects of short-term aerobic training: Physiological responses to graded exercise

机译：短期有氧训练的早期影响：分级运动的生理反应

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Aim. The aim of this study was to find out how early the moderate training effects appear and to check the hypothesis that familiarization with exercise protocol may contribute to an early physiological responses to training in previously sedentary subjects. Methods. Twelve male, sedentary volunteers (22.0 +- 0.7 yrs) were submitted to 3 weeks of a bicycle ergometer training, consisting of 45 min of exercise (at 70% VO_2max), 3-4 times a week. The subjects performed 4 incremental exercise tests until volitional exhaustion: 2 before training (C1 and C2), and then after 1 (T1) and 3 (T3) weeks of training. During exercise HR, VO_2, electrical activity (EMG) of rectus femoris, biceps femoris, soleus and tra-pezius muscles were recorded and blood samples were taken for blood lactate (LA) determination. Results. Already after 1 week of training HR decreased (p<0.05) with a further decline after 3 weeks the training (p<0.01). Maximal work load after 3 weeks of training increased to 277 +- 10.4 W vs 250 +- 9.5 W (p<0.05), VO_2max achieved higher values than in C1 and C2 tests (p<0.05) and LA and EMG thresholds were elevated (p<0.05). Conclusion. A decrease in the resting and submaximal heart rate is the earliest effect of increased physical activity. Familiarization to exercise protocol decreased EMG of biceps femoris and soleus muscles during exercise, but did not influence that of rectus femoris muscle the most engaged during cycling.
机译：目标。这项研究的目的是发现中等程度的训练效果如何早期出现，并检验以下假设：熟悉运动方案可能有助于对先前久坐的受试者进行早期的生理反应。方法。十二名久坐不动的男性志愿者（22.0±0.7岁）接受了3周的自行车测功训练，包括45分钟的锻炼（70％VO_2max），每周3-4次。受试者进行了4次增量运动测试，直到达到疲劳为止：训练前2次（C1和C2），然后训练1（T1）和3（T3）周。在运动期间，记录HR，VO_2，股直肌，股二头肌，比目鱼肌和斜方肌的电活动（EMG），并采集血样进行血乳酸（LA）测定。结果。训练1周后，HR已下降（p <0.05），而训练3周后HR进一步下降（p <0.01）。训练3周后的最大工作负荷增加到277 +-10.4 W vs 250 +-9.5 W（p <0.05），VO_2max值高于C1和C2测试（p <0.05），并且LA和EMG阈值升高（ p ＜0.05）。结论。静息和次最大心律的降低是增加体育锻炼的最早作用。熟悉运动规程可减少运动过程中股二头肌和比目鱼肌的肌电图，但不会影响骑自行车时最活跃的股直肌的肌电图。

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