Tesema Gashaw, George Mala, Mondal Soumitra, Mathivana D
Department of Sport Science, College of Natural and Computational science, Mizan-Tepi University, Tepi, Ethiopia.
Department of Sport Science, College of Natural and Computational Sciences, Mekelle University, Mekelle, Ethiopia.
BMJ Open Sport Exerc Med. 2019 Sep 18;5(1):e000644. doi: 10.1136/bmjsem-2019-000644. eCollection 2019.
Endurance training in varied intensity zones are more likely to show different adaptive responses. However, it is still unclear the intensity level of endurance exercise in junior young athletes that may promote increased markers for cardiorespiratory and cardiometabolic response. Therefore, we aimed to investigate the effect of 1 week different intensity endurance training on markers of cardiorespiratory and cardiometabolic response in young athletes.
Thirty apparently healthy male young athletes averaging 19.4±1.3 years of age were recruited and randomly assigned to two different intensity endurance training groups. The first group trained at 60% to 70% maximum heart rate (HRmax) for 45 min per session and the second group trained at 70% to 80% HRmax for 30 min per session for a period of 1 week three sessions per week. A pre-training and post-training, marker of cardiorespiratory and cardiometabolic response was assessed for both groups.
Both intensity training had no significant effect on markers of cardiorespiratory response within and between training groups (p>0.05). Whereas, cardiometabolic markers lactate dehydrogenase (p=0.001), cardiac troponin I (p=0.001) and creatine kinase myocardial band (p=0.001) significantly increased at the end of 1 week within the group in both training groups (p≤0. 05). In the comparative analysis between groups, there was no significant difference in markers of cardiometabolic response (p>0.05).
1 week 60% to 70% HRmax and 70% to 80% HRmax intensity zones induces similar acute effects on markers for cardiometabolic and cardiorespiratory responses between groups and significant elevations of cardiometabolic markers within the groups in moderately trained young athletes.
在不同强度区域进行耐力训练更有可能表现出不同的适应性反应。然而，对于青少年运动员而言，能促进心肺和心脏代谢反应指标升高的耐力运动强度水平仍不明确。因此，我们旨在研究1周不同强度的耐力训练对年轻运动员心肺和心脏代谢反应指标的影响。
招募30名平均年龄为19.4±1.3岁的明显健康男性年轻运动员，并将他们随机分为两个不同强度的耐力训练组。第一组以最大心率（HRmax）的60%至70%进行训练，每次训练45分钟；第二组以HRmax的70%至80%进行训练，每次训练30分钟，为期1周，每周训练3次。对两组运动员在训练前和训练后进行心肺和心脏代谢反应指标的评估。
两组训练强度对训练组内和训练组间的心肺反应指标均无显著影响（p>0.05）。然而，在两组训练组中，心脏代谢指标乳酸脱氢酶（p=0.001）、心肌肌钙蛋白I（p=0.001）和肌酸激酶同工酶（p=0.001）在1周结束时均显著升高（p≤0.05）。在组间比较分析中，心脏代谢反应指标无显著差异（p>0.05）。
对于训练有素的年轻运动员，1周内HRmax的60%至70%和70%至80%强度区域对组间心脏代谢和心肺反应指标产生相似的急性影响，且组内心脏代谢指标显著升高。
