Cortisol levels of caregivers in child care centers as related to the quality of their caregiving     

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   

冬训对男子优秀游泳运动员内分泌和免疫机能影响的研究     

金锦萍  王恬 《中国体育科技》2007,43(6):63-66

目的:探讨冬训对男子优秀游泳运动员内分泌和免疫机能的影响。方法:对7名优秀男子游泳运动员冬训期间睾酮、皮质醇、免疫球蛋白、T淋巴细胞亚群、NK细胞、NKT细胞的变化进行观察。结果:血清T在冬训过程中无显著性变化,血清C在第2周显著高于调整期水平,随后逐渐下降,恢复1周时明显低于其他训练各周次(P<0.05),T/C比值在训练第3周、第4周显著低于调整期水平(P<0.05)。免疫球蛋白、CD3 、CD4 、CD8 、CD4 /CD8 比值在冬训过程中变化不大;NK细胞在冬训第2周开始出现持续下降趋势,恢复1周时有回升的迹象,但仍显著低于调整期水平(P<0.05);NKT细胞在冬训期训练第2周开始出现持续显著性下降(P<0.01),恢复1周时虽有回升的迹象,但仍显著低于调整期水平(P<0.01)。结论:冬训对男子游泳运动员的内分泌和免疫机能产生一定程度的影响,但没有造成明显的免疫失衡和过度疲劳。  相似文献   

不同运动方式对唾液sIgA 的影响   总被引：1，自引：0，他引：1  

向剑锋  刘无逸 《天津体育学院学报》2007,22(1):77-79

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   

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  

董淮南  陈刚  郭子渊 《成都体育学院学报》2001,27(1):76-78

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   

高住低训法对短道速滑优秀运动员血清睾酮及皮质醇的影响     

衣志宏  王钢 《冰雪运动》2011,33(4):49-52

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   

迷迭香对大强度耐力训练大鼠血清睾酮和肾上腺皮质激素的影响     

张婧  熊正英 《沈阳体育学院学报》2006,25(6):58-59,65

研究迷迭香对大强度耐力训练大鼠血清睾酮和肾上腺皮质激素的影响。方法:本实验选用SD大鼠,建立大强度耐力训练模型,训练结束测定其血清睾酮和肾上腺皮质激素。结果:大强度耐力训练可使大鼠血清睾酮下降,皮质醇水平上升,睾酮/皮质醇(T/C)值下降,说明大强度耐力训练已造成大鼠机体神经内分泌系统机能紊乱,使大鼠体内的分解代谢持续加强。服用迷迭香后大鼠血清睾酮水平均明显高于其相应的对照组,T/C值明显升高;服用迷迭香的大强度耐力训练组大鼠血清皮质醇水平明显下降。结论:服用迷迭香可以促进大强度耐力训练后大鼠合成代谢加强,有利于能量物质的储存,促进运动性疲劳的恢复。  相似文献   

有氧运动力竭后摄入维生素C对IgA和IgG的影响——以武术运动员为例     

姚彬彬 《石家庄学院学报》2014,(3):113-117

以24位武术运动员为研究样本,分析武术运动员在从事高强度有氧训练至力竭后维生素C摄入量对其血清免疫球蛋白A和G所产生的影响.研究显示:维生素C的摄入对实验对象血清IgA,IgG和皮质醇浓度产生显著影响(P≤0.05),维生素C诱导增加IgA和IgG的浓度,进而可能有助于改善免疫性能和降低传染病的感染风险;同时,实验对象血液中皮质醇水平明显下降(P≤0.05).结果表明,在从事高强度有氧训练至体力极限后摄入维生素C有助于改善某些免疫系统指标.  相似文献   

Effect of 4 weeks of basic military training on peripheral blood leucocytes and urinary excretion of catecholamines and cortisol     

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   

Changes in acute biochemical markers of inflammatory and structural stress in rugby union     

Angus Lindsay  John Lewis  Carl Scarrott  Nick Draper 《Journal of sports sciences》2015,33(9):882-891

Rugby union is a sport governed by the impacts of high force and high frequency. Analysis of physiological markers following a game can provide an understanding of the physiological response of an individual and the time course changes in response to recovery.

Urine and saliva were collected from 11 elite amateur rugby players 24 h before, immediately after, and at 17, 25, 38, 62 and 86 h post-game. Myoglobin, salivary immunoglobulin A and cortisol were analysed by ELISA, whereas neopterin and total neopterin were analysed by high-performance liquid chromatography.

There was a significant post-game increase of all four markers. The increases were cortisol 4-fold, myoglobin 2.85-fold, neopterin 1.75-fold and total neopterin 2.3-fold when corrected with specific gravity. All significant changes occurred post-game only, with markers returning to and remaining at baseline within 17 h.

The intensity of the game caused significant changes in key physiological markers of stress. They provide an understanding of the stress experienced during a single game of rugby and the time course changes associated with player recovery. Neopterin provides a new marker of detecting an acute inflammatory response in physical exercise, while specific gravity should be considered for urine volume correction post-exercise.  相似文献   

一种制作唾腺染色体的好材料——摇蚊     

路淑霞  杜启艳 《周口师范学院学报》2000,(5)

唾腺染色体的观察是各高等院校遗传学实验的必开内容 ,本文介绍一种好制作、易观察的唾腺染色体材料———摇蚊 ,并介绍了分析唾腺染色体斑带的简单方法  相似文献