CARDIORESPIRATORY AND METABOLIC COSTS OF CONTINUOUS AND INTERMITTENT EXERCISE IN MAN
CARDIORESPIRATORY AND METABOLIC COSTS OF CONTINUOUS AND INTERMITTENT EXERCISE IN MAN
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DOI：
10.1113/jphysiol.1973.sp010356
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发表时间：
1973-01-01
影响因子：
5.5
通讯作者：
WIGERTZ, O
中科院分区：
文献类型：
--
作者：
EDWARDS, RHT;EKELUND, LG;WIGERTZ, O
1. 研究人员对8名男性进行了平均能量输出相同的连续和间歇运动的心肺和代谢反应。在不同的运动模式下，心率、换气和肺气体交换在一个循环测力仪上进行测量。在无负荷蹬车30分钟内测量恢复氧量。在运动前、运动中、运动后分别取股外侧肌穿刺活检标本，测定肌肉代谢产物。间歇运动的心率、通气量、摄氧量、呼吸交换率和血乳酸浓度普遍高于连续运动，心率、通气量和摄氧量的累积总量也高于连续运动。肌肉活检样本往往有较高的乳酸和较低的磷酸肌酸含量在间歇性运动。运动前无负荷蹬车时肌肉和血液中的乳酸浓度相同，但运动时肌肉中的乳酸浓度明显高于血液中的乳酸浓度。这种浓度梯度在间歇运动时大于连续运动时。工作效率，根据工作的总耗氧量计算，在无负荷蹬车控制下，间歇性运动显著降低。这种解释被认为与以下观察有关：当在短时间内以高速率进行工作时，大部分氧化恢复发生在休息期间的收缩之后，而在低强度连续运动中，氧气主要是在工作进行时利用的。这表明，在间歇性运动的部分时间里，肌肉在无氧条件下工作。虽然在这种形式的活动中，可能会降低磷酸再合成的效率，但更有可能的是，所描述的结果是由于在间歇性运动中形成了更多的乳酸。
1. Cardiorespiratory and metabolic responses to paired patterns of continuous and intermittent exercise with the same average power output were studied in eight men. Heart rate, ventilation and pulmonary gas exchange were measured during the different patterns of exercise performed on a cycle ergometer. The recovery oxygen volume was measured over 30 min of loadless pedalling. Needle biopsy samples of the vastus lateralis muscle were taken before, during and after completion of the exercise for measurement of muscle metabolites.2. Heart rate, ventilation, oxygen intake, respiratory exchange ratio, and blood lactate concentration were generally higher with intermittent compared with continuous exercise as were the accumulated totals for heart beats, ventilation and oxygen intake. Muscle biopsy samples tended to have higher lactate and lower phosphocreatine contents in intermittent exercise. The lactate concentration in muscle and blood water was the same during loadless pedalling before exercise but was significantly higher in muscle than blood during exercise. This concentration gradient was larger in intermittent than in continuous exercise.3. Work efficiency, calculated from the total oxygen cost of work in excess of a loadless pedalling control, was significantly lower in intermittent exercise. The explanation is thought to be connected with the observation that when the work was performed at a high rate in short bursts a large part of the oxidative recovery took place after the contraction during the rest periods, whereas in the low intensity continuous exercise the oxygen was mainly utilized while the work was being performed. This indicates that for part of the time in the intermittent exercise the muscle was working under anaerobic conditions. Although the possibility exists that the efficiency of resynthesis of phosphagen may be reduced in this form of activity, it is more likely that the result described is due to the greater amount of lactate formed in the intermittent exercise.