The week or ten days before competition is the time to cut down the amount of training,but the quality of the food must be improved, i.e.comprehensive nutrient must be supplied so as to increase the energy reserve and...The week or ten days before competition is the time to cut down the amount of training,but the quality of the food must be improved, i.e.comprehensive nutrient must be supplied so as to increase the energy reserve and speed up the recovery form the pre-competition training.Calories in the food supply should be reduced lest it causes the increase of body fat and weight.In pre-competition food, glycogen reserve Should be fully guaranteed, acid food of protein of fat must be replenished exceessively. Runners should eat fruit and vegetables as much as possible to fill up various vitamins and inorganic salts.展开更多
Fluctuations in autonomic cardiovascular regulation during exposure to high altitude may increase the risk of heart attack during waking and sleep. This study compared heart rate variability (HVR) and its components d...Fluctuations in autonomic cardiovascular regulation during exposure to high altitude may increase the risk of heart attack during waking and sleep. This study compared heart rate variability (HVR) and its components during sleep at low altitude and after 30 - 41 hours of acclimatization at high altitude (3480 m) in five mountain marathon runners controlled for diet, drugs, light-dark cycle and jet lag. In comparison to sea level, RR-intervals during sleep at high altitude decreased significantly (P 0.001). The significant increase in sympathetic autonomic cardiovascular modulation at high altitude protects against excessive oxygen deprivation during sleep. Increases in R-R intervals can require longer periods of acclimatization at3480 m to mitigate the effects of altitude/hypoxia on sympathetic tone, thus reducing cardiovascular distress at rest during waking and sleep and probably before during and after athletic performance at altitude.展开更多
Altered blood chemistry, acid-base and electrolyte are suggested determinants of sleep disturbance, with frequent arousal at high altitude even in well and long-trained altitude marathon runners. In this sample of exp...Altered blood chemistry, acid-base and electrolyte are suggested determinants of sleep disturbance, with frequent arousal at high altitude even in well and long-trained altitude marathon runners. In this sample of experienced altitude marathon runners with maximal aerobic power at sea level of 61.4 ± 2.7 ml/kg-1·min-1 we found that pO2 and percent of oxygen saturation (%SO2) were lower at2050 mand3480 mthan at sea level;pO2 was higher after 38 - 41 hours than after 30 - 31 hours of acclimatization at3480 m(P 2 decreased (P 2 and (P 2 at a sleeping altitude of3480 mwas lower (P Simple regression analysis disclosed a significant correlation between the changes in TST and the percent of REM sleep and the changes in %SpaO2 recorded during sleep (P 2 at higher altitude and the percent of W and of TST (P 2, tCO2 and [HCO3-] correlated negatively and significantly with the percent of REM sleep changes at high altitude (P 2 and pH and correlated negatively with the changes in %SO2, pCO2, tCO2, and [HCO3-] (P ++] and [BE] and negatively with the changes in buffered bases [BB] and [BEeffective] (P 2 and significantly and negatively with the changes in [K+] (P 2, tCO2, [HCO3-] and [K+]展开更多
分析针灸对长时间运动训练的中长跑运动员(青少年运动员)半程马拉松比赛后淋巴细胞及亚群等的影响。结果显示:赛后4 h CD3+、CD4+、CD8+均比不训练时显著下降,赛后28 h基本恢复至不训练时水平,经针灸干预的CD3+、CD4+、CD8+略有增高,但...分析针灸对长时间运动训练的中长跑运动员(青少年运动员)半程马拉松比赛后淋巴细胞及亚群等的影响。结果显示:赛后4 h CD3+、CD4+、CD8+均比不训练时显著下降,赛后28 h基本恢复至不训练时水平,经针灸干预的CD3+、CD4+、CD8+略有增高,但变化无显著性差异;赛后4 h、28 h NK细胞数量呈逐渐下降,与不训练时无显著性差异,赛后28 h经针灸干预的NK细胞数量下降较未经针灸干预的少得多;赛后4 h、28 hNKT细胞数量与不训练时相比明显减少,差异显著,赛后28 h较赛后4 h少量增加,经针灸干预的增加多,有显著差异。提示:免疫系统在强烈或耐力跑后可出现短暂压抑,针灸在一定程度上可对免疫系统产生明显的调节作用。展开更多
目的观察业余选手在马拉松比赛中应激反应的程度。方法 26名业余选手行马拉松全程比赛,赛前1 h和赛后5 m in采动静脉血监测相关项目。结果与应激反应有关的肾素、血管紧张素、皮质醇等赛后均增高;HR增高明显。结论业余选手在马拉松比赛...目的观察业余选手在马拉松比赛中应激反应的程度。方法 26名业余选手行马拉松全程比赛,赛前1 h和赛后5 m in采动静脉血监测相关项目。结果与应激反应有关的肾素、血管紧张素、皮质醇等赛后均增高;HR增高明显。结论业余选手在马拉松比赛中应激反应明显,其程度仍属于正常生理应激反应范围,仅个别项目表现出过度应激。展开更多
文摘The week or ten days before competition is the time to cut down the amount of training,but the quality of the food must be improved, i.e.comprehensive nutrient must be supplied so as to increase the energy reserve and speed up the recovery form the pre-competition training.Calories in the food supply should be reduced lest it causes the increase of body fat and weight.In pre-competition food, glycogen reserve Should be fully guaranteed, acid food of protein of fat must be replenished exceessively. Runners should eat fruit and vegetables as much as possible to fill up various vitamins and inorganic salts.
文摘Fluctuations in autonomic cardiovascular regulation during exposure to high altitude may increase the risk of heart attack during waking and sleep. This study compared heart rate variability (HVR) and its components during sleep at low altitude and after 30 - 41 hours of acclimatization at high altitude (3480 m) in five mountain marathon runners controlled for diet, drugs, light-dark cycle and jet lag. In comparison to sea level, RR-intervals during sleep at high altitude decreased significantly (P 0.001). The significant increase in sympathetic autonomic cardiovascular modulation at high altitude protects against excessive oxygen deprivation during sleep. Increases in R-R intervals can require longer periods of acclimatization at3480 m to mitigate the effects of altitude/hypoxia on sympathetic tone, thus reducing cardiovascular distress at rest during waking and sleep and probably before during and after athletic performance at altitude.
文摘Altered blood chemistry, acid-base and electrolyte are suggested determinants of sleep disturbance, with frequent arousal at high altitude even in well and long-trained altitude marathon runners. In this sample of experienced altitude marathon runners with maximal aerobic power at sea level of 61.4 ± 2.7 ml/kg-1·min-1 we found that pO2 and percent of oxygen saturation (%SO2) were lower at2050 mand3480 mthan at sea level;pO2 was higher after 38 - 41 hours than after 30 - 31 hours of acclimatization at3480 m(P 2 decreased (P 2 and (P 2 at a sleeping altitude of3480 mwas lower (P Simple regression analysis disclosed a significant correlation between the changes in TST and the percent of REM sleep and the changes in %SpaO2 recorded during sleep (P 2 at higher altitude and the percent of W and of TST (P 2, tCO2 and [HCO3-] correlated negatively and significantly with the percent of REM sleep changes at high altitude (P 2 and pH and correlated negatively with the changes in %SO2, pCO2, tCO2, and [HCO3-] (P ++] and [BE] and negatively with the changes in buffered bases [BB] and [BEeffective] (P 2 and significantly and negatively with the changes in [K+] (P 2, tCO2, [HCO3-] and [K+]
文摘目的观察业余选手在马拉松比赛中应激反应的程度。方法 26名业余选手行马拉松全程比赛,赛前1 h和赛后5 m in采动静脉血监测相关项目。结果与应激反应有关的肾素、血管紧张素、皮质醇等赛后均增高;HR增高明显。结论业余选手在马拉松比赛中应激反应明显,其程度仍属于正常生理应激反应范围,仅个别项目表现出过度应激。
