排序方式: 共有69条查询结果,搜索用时 0 毫秒
31.
目的:观察射箭运动员在冬训期间不同训练时期的血液内分泌指标和氨基酸的变化。方法:用化学发光法测定运动员血清睾酮(T)和皮质醇(C),用高效液相色谱法测定血液中四种氨基酸天门冬氨酸(Asp)、谷氨酸(Glu)、甘氨酸(Gly)和r-氨基丁酸(GABA)的含量。结果:男运动员训练疲劳后血睾酮明显下降(P<0.01),与进行中等强度训练时比较也降低,具有显著性意义(P<0.05)。运动员在运动疲劳期,皮质醇显著升高(P<0.01),而T/C比值显著下降(P<0.01)。女运动员在大强度大运动量训练后,血睾酮、T/C比值明显下降(P<0.05),皮质醇明显升高。中等强度训练时,男、女皮质醇较训练前期明显升高(P<0.05)。在进行中等强度训练期和大强度训练期运动后1小时血浆中谷氨酸的血浆浓度明显升高(P<0.01),而在大强度训练期后明显下降,低于安静值。门冬氨酸在中等强度训练后血浆浓度也升高(P<0.05),在疲劳期则呈下降趋势,但仍高于安静值。在进行中等强度训练期和大强度训练期运动1小时后血浆中r-氨基丁酸、甘氨酸均上升,大强度训练期明显升高,与训练前期安静值相比有显著意义(P<0.01)。结论:射箭运动员在长时... 相似文献
32.
采用实验法测定优秀短道速滑运动员高住低训(HiLo)前后血清睾酮及皮质醇的变化,研究短道速滑运动员血清睾酮及皮质醇的变化,了解在低氧实验中这些激素的变化规律,为合理安排运动训练、监控和调节运动员体能,掌握恢复手段提供科学依据。实验结果表明,HiLo在短期内提高血清睾酮及运动能力有明显的效果,对加强合成代谢能力、提高赛前储备能量有更深层次的意义。 相似文献
33.
Polyzois Makras George N Koukoulis George Bourikas George Papatheodorou Konstantinos Bedevis Panagiotis Menounos 《Journal of sports sciences》2013,31(8):825-834
In this study, we assessed the effects of a 4 week basic military physical training programme for male recruits of the Hellenic Air Force on the number and distribution of circulating immune cells and adrenergic and adrenocortical hormonal responses. One group of recruits (exercised, n = 48) participated in moderate intermittent physical exercise, whereas a second group (non-exercised controls, n = 9) performed only light work in the barracks. Both groups participated in the same non-physical, classroom-type training and testing. Military training by the exercised group resulted in significant increases in CD4?+? T-lymphocytes, renal cortisol excretion and the urinary noradrenaline/adrenaline ratio, together with reductions in neutrophils and the neutrophil/lymphocyte ratio. In the exercised group, the urinary noradrenaline/adrenaline ratio correlated positively with the training-induced changes in CD4?+? T-lymphocytes and negatively with changes in the neutrophil/lymphocyte ratio. No significant relationship was found between training-induced increases in cortisol excretion and any of the peripheral blood cell alterations. Our results indicate that 4 weeks of military training consisting of intermittent moderate exercise resulted in a significant increase in CD4?+? T-lymphocytes and reduction in neutrophils. These changes were probably driven by alterations in hormonal status, including the significant impact of sympathetic nervous system activation. 相似文献
34.
Jiří Baláš David Giles Leona Chrastinová Kateřina Kárníková Jan Kodejška Alžběta Hlaváčková 《Journal of sports sciences》2017,35(10):989-994
The aim of this study was to examine the effect of alterations in potential lead fall distance on the hormonal responses of rock climbers. Nine advanced female climbers completed two routes while clipping all (PRO-all) or half (PRO-½) of the fixed points of protection. Venous blood samples were analysed for total catecholamines, noradrenaline (norepinephrine), adrenaline (epinephrine), dopamine, lactate, cortisol and serotonin. Differences between the two conditions pre, immediately post and 15 min post climbing were assessed using a 2 × 3 repeated measures ANOVA. All hormones and blood lactate concentrations increased significantly (P < 0.05) immediately post climb, except for cortisol. Peak cortisol concentrations did not occur until 15 min post ascent. Further, significant interactions between climbing and clipping conditions were found for total catecholamines (890% of basal concentration in PRO-½ vs. 568% in PRO-all), noradrenaline (794% vs. 532%) and dopamine (500% vs. 210%). There were no significant interactions for adrenaline (1920% vs. 1045%), serotonin (150% vs. 127%) or lactate (329% vs. 279%). The study showed a greater catecholamine response with an increase in potential lead fall distance. The most pronounced increases seen in catecholamine concentration were reported for dopamine and noradrenaline. 相似文献
35.
实战对摔跤运动员血睾酮、游离睾酮、皮质醇及其比值的影响 总被引:6,自引:0,他引:6
为了解摔跤运动员实战前后血睾酮(T)、游离睾酮(FT)和皮质醇(C)变化的情况,力求找到它们与训练负荷之间可能存在的关系,对我省16名优秀摔跤运动员进行了跟踪监测。结果显示:小强度实战对它们的影响不明显;中等强度及中偏大强度的实践血睾酮、游离睾酮、皮质醇及其比值有不同性质和程度的影响。 相似文献
36.
牛蒡甙对训练大鼠运动能力、睾酮和皮质醇影响的实验研究 总被引:2,自引:0,他引:2
探讨牛蒡子的提取物牛蒡甙对训练大鼠运动能力的影响,以SD雄性大鼠为实验对象,将实验对象分为安静对照组、训练对照组、运动服药组进行对照比较,测试3个组在力竭运动时运动能力、血睾酮含量和血液皮质醇含量的变化。实验结果显示:牛蒡甙可以显著延长大鼠跑台运动力竭时间;大强度训练可以引起血睾酮含量下降和血液皮质醇含量升高,牛蒡甙可以使训练大鼠血睾酮含量显著性增加和血液皮质醇含量显著下降。结论认为,牛蒡甙可以延长大鼠跑台至力竭时间,具有抗疲劳作用;其抗疲劳作用可能与其升高血睾酮和降低血液皮质醇的水平有关。 相似文献
37.
Elles J. de Schipper J. Marianne Riksen-Walraven Sabine A.E. Geurts Carolina de Weerth 《Early childhood research quarterly》2009
The present study examined whether stress in professional caregivers – as reflected in salivary cortisol levels – is related to the quality of their caregiving behavior. The 221 professional female caregivers in 64 child care centers were observed in three different situations and saliva samples were taken three times during the morning. Results showed that higher levels of cortisol, particularly at the beginning of the workday, predicted lower-quality caregiver behavior beyond the contribution of three other predictors, namely a higher self-reported physical workload, more children under age two in the care group, and lower caregiver age. Contrary to the expectation, higher cortisol levels did not mediate the relation between higher self-reported physical workload and more children under age two on the one hand and lower-quality caregiving behavior on the other. 相似文献
38.
模拟高住低练对优秀游泳运动员身体成分和物质代谢的影响 总被引:14,自引:0,他引:14
以12名山东省游泳运动员为实验对象,分为模拟高住低练组和对照组,利用低压舱研究模拟高住低练对身体成分和物质代谢的影响。研究发现:模拟高住低练组除体脂重量外,体重、瘦体重、肌肉重量、肌肉蛋白均显著低于实验前(P<0.05),对照组体重、瘦体重、肌肉重量、肌肉蛋白、肌肉水分、体脂重量实验前后均无明显变化;模拟高住低练组除血清尿素明显升高外(P<0.05),其他指标无明显变化,对照组血清尿素、游离脂肪酸、甘油三脂、总胆固醇实验前后均无明显变化;实验后对照组和模拟高住低练组血清睾酮都稍有升高,对照组血清皮质醇明显降低(P<0.05),模拟高住低练组皮质醇无明显变化。结论:模拟高住低练可明显降低体重,肌肉丢失和肌肉蛋白的减少是体重下降的主要原因,高浓度的血尿素表明模拟高住低练可促进蛋白的分解,而蛋白分解作用的增强可能与较高浓度的皮质醇有关。 相似文献
39.
不同运动方式对唾液sIgA 的影响 总被引:1,自引:0,他引:1
目的:了解不同运动方式对唾液分泌型免疫球蛋白A(sIgA)的影响。方法:8名普通大学生进行95%最大摄氧量(VO2max)强度的功率自行车间歇运动和连续3天的30 min、75%VO2max强度持续运动,8名田径运动员进行3种急性运动(10 000 m跑、1节强化训练课和1次递增负荷力竭性跑台运动),观察各种运动前后的唾液sIgA变化情况。结果:95%VO2max强度间歇运动后即刻唾液sIgA分泌率降低,3天连续运动后即刻的唾液sIgA分泌率逐渐下降,运动员强化训练课后唾液sIgA浓度降低。结果提示,大强度运动会降低唾液sIgA水平,长期耐力训练对黏膜免疫系统有累积性抑制作用。 相似文献
40.
力竭运动及慢性心理应激对血尿素氮和皮质醇的影响 总被引:1,自引:0,他引:1
通过建立心理应激和力竭运动动物模型,测定慢性心理应激和力竭运动后大鼠血清中血尿素氮的含量及皮质醇的含量,揭示运动及心理应激对免疫功能的影响。结论:力竭运动使血尿素氮升高,该实验运动模型的建立比较合理。慢性情绪应激基础上的力竭运动会引起皮质醇含量的显著升高,其可能的机理是情绪应激加上力竭运动,比单一的应激引起机体的应激状态更为明显。 相似文献