Effect of tapering period on plasma hormone concentrations,mood state,and performance of elite male cyclists     

《European Journal of Sport Science》2013,13(3):183-190

Abstract

In this study, we investigated the effect of 1- and 3-week tapering periods on concentrations of plasma testosterone (T), cortisol (C), T/C ratio, mood state, and performance in elite male cyclists. After 8 weeks of progressive training, cyclists were randomly assigned to a control group (n=12) who continued performing intense training for a further 3 weeks, or a taper group (n=12) who continued with a 50% reduction in training volume. Blood testosterone and cortisol concentrations were assayed and the T/C ratio calculated from analysis obtained via standard ELISA. Mood state was determined using the Profile of Mood States (POMS) questionnaire. All data were collected immediately after a 40-km time-trial performed before, during, and after the 8-week training protocol and after the 1- and 3-week tapering/training periods. In the taper group, 40-km time-trial time decreased significantly (P<0.01) and equally for both the 1- and 3-week taper periods relative to the control group. There were significant elevations in T/C ratio (P<0.001) and reductions in cortisol concentrations and POMS scores in the taper group relative to the control groups at the end of both the 1- and 3-week tapering periods. Hence, taper periods are effective in improving performance and mood state and elevating the blood T/C ratio.  相似文献   

Salivary and plasma cortisol and testosterone responses to interval and tempo runs and a bodyweight-only circuit session in endurance-trained men     

Amy Vivien Tanner  Birthe Vejby Nielsen  Judith Allgrove 《Journal of sports sciences》2013,31(7):680-689

Abstract

The aim of this study was to examine the acute response to plasma and salivary cortisol and testosterone to three training protocols. Ten trained endurance athletes participated in three experimental trials, such as interval training (INT), tempo run (TEMP) and bodyweight-only circuit training (CIR), on separate days. Blood and saliva samples were collected pre- and 0, 15, 30 and 60 min post-exercise. Peak post-exercise salivary cortisol was higher than pre-exercise in all trials (P < 0.01). After INT, salivary cortisol remained elevated above pre-exercise than 60 min post-exercise. Salivary testosterone also increased post-exercise in all trials (P < 0.05). Plasma and salivary cortisol were correlated between individuals (r = 0.81, 0.73–0.88) and within individuals (r = 0.81, 0.73–0.87) (P < 0.01). Plasma and salivary testosterone was also correlated between (r = 0.57, 0.43–0.69) and within individuals (r = 0.60, 0.45–0.72), (P < 0.01). Peak cortisol and testosterone levels occurred simultaneously in plasma and saliva, but timing of post-exercise hormone peaks differed between trials and individuals. Further investigation is required to identify the mechanisms eliciting an increase in hormones in response to CIR. Furthermore, saliva is a valid alternative sampling technique for measurement of cortisol, although the complex, individual and situation dependent nature of the hormone response to acute exercise should be considered.  相似文献   

中等强度有氧运动大鼠环境应激的保护效应及其机制探讨     

赵振  苏铁柱 《长治学院学报》2012,29(5):78-82

通过观察经中等强度有氧运动后大鼠对损害性应激的反应变化及神经内分泌改变,探讨中等强度有氧运动对大鼠应对外界损害性应激能力的影响及其机制。  相似文献   

台阶运动负荷前后唾液睾酮和皮质醇的测定与分析   总被引：3，自引：0，他引：3  

孔兆伟  田时佳  蒙自奋 《北京体育大学学报》1996,(3)

通过对10名普通健康男大学生安静状态下及两种运动负荷后唾液睾酮、唾液皮质醇和RPE（主观体力感觉）表等生理指标的测定，发现：运动后，唾液睾酮水平升高，唾液皮质醇无显著变化但有升高趋势。RPE等级升高。结果表明：两次台阶运动负荷后，唾液睾酮、唾液皮质酸及RPE表可作为评定运动疲劳的生理指标。  相似文献   

Salivary hormones and anxiety in winners and losers of an international judo competition     

Elena Papacosta  George P. Nassis  Michael Gleeson 《Journal of sports sciences》2016,34(13):1281-1287

The purpose of this study was to investigate the responses of salivary hormones and salivary secretory immunoglobulin A (SIgA) and anxiety in winners and losers during an international judo competition. Twenty-three trained, male, national-level judo athletes provided three saliva samples during a competition day: morning, in anticipation of competition after an overnight fast, mid-competition, and post-competition within 15 min post-fight for determination of salivary cortisol, salivary testosterone, salivary testosterone/cortisol ratio, SIgA absolute concentrations, SIgA secretion rate and saliva flow rate. The competitive state anxiety inventory questionnaire was completed by the athletes (n = 12) after the first saliva collection for determination of somatic anxiety, cognitive anxiety and self-confidence. Winners were considered 1-3 ranking place (n = 12) and losers (n = 11) below third place in each weight category. Winners presented higher anticipatory salivary cortisol concentrations (p = 0.03) and a lower mid-competition salivary testosterone/cortisol ratio (p = 0.003) compared with losers with no differences for salivary testosterone. Winners tended to have higher SIgA secretion rates (p = 0.07) and higher saliva flow rates (p = 0.009) at mid-competition. Higher levels of cognitive anxiety (p = 0.02) were observed in the winners, without differences according to the outcome in somatic anxiety and self-confidence. The results suggest that winners experienced higher levels of physiological arousal and better psychological preparedness in the morning, and as the competition progressed, the winners were able to control their stress response better.  相似文献   

Effects of strength and endurance exercise order on endocrine responses to concurrent training     

Thomas W. Jones  Glyn Howatson  Mark Russell 《European Journal of Sport Science》2017,17(3):326-334

The present study examined the effect of strength and endurance training order on the endocrine milieu associated with strength development and performance during concurrent training. A randomised, between-groups design was employed with 30 recreationally resistance-trained males completing one of four acute experimental training protocols; strength training (ST), strength followed by endurance training (ST-END), endurance followed by strength training (END-ST) or no training (CON). Blood samples were taken before each respective exercise protocol, immediately upon cessation of exercise, and 1?h post cessation of exercise. Blood samples were subsequently analysed for total testosterone, cortisol and lactate concentrations. Ability to maintain 80% 1RM during strength training was better in ST and ST-END than END-ST (both p?<?.05). Immediately following the respective exercise protocols all training interventions elicited significant increases in testosterone (p?<?.05). ST and END-ST resulted in greater increases in cortisol than ST-END (both p?<?.05). The testosterone:cortisol ratio was similar following the respective exercise protocols. Blood lactate concentrations post-training were greater following END-ST and ST than ST-END (both p?<?.05). Conducting endurance exercise prior to strength training resulted in impaired strength training performance. Blood cortisol and lactate concentrations were greater when endurance training was conducted prior to strength training than vice versa. As such, it may be suggested that conducting endurance prior to strength training may result in acute unfavourable responses to strength training when strength training is conducted with high loads.  相似文献   

运动训练对人体皮质醇影响的研究进展     

郭静洁 《搏击·武术科学》2012,(2):120-121

运动训练影响人体内分泌系统的功能,并明显改变体内某些激素的水平。皮质醇属于快反应型糖皮质激素,是较为重要的应激激素,具有广泛而重要的作用。文章运用文献资料法,论述了不同运动负荷、项目以及非训练因素作用下皮质醇的变化,指导教练员和运动员调整运动负荷,合理安排训练内容。  相似文献   

极限负荷时β-内啡肽、睾酮、皮质醇对心肺功能的影响     

郭军  陆绍中  李开刚 《福建体育科技》1998,(1)

极限负荷时运动持续时间和运动水平密切相关。研究发现运动后睾酮（T）水平与耗氧平台（VO2maxPD）显著相关,β－内啡肽（β－EP）分泌水平与最大耗氧量,耗氧平台,呼吸频率显著相关。揭示耗氧平台的维系,可能有垂体—性腺轴的参与。而β－内啡肽对呼吸频率及耗氧平台的维系也存在着调控作用。耗氧平台时心率和通气量较之安静时大辐度增长,间接说明儿茶酚胺在极限负荷时对循环系统的支持。  相似文献   

5周递增负荷训练对内分泌免疫机能影响的研究   总被引：1，自引：0，他引：1  

吴卫兵  陈佩杰  刘晓丹  陶占泉  王茹  刘瑾彦 《体育科学》2007,27(4):59-63

目的：探讨递增负荷训练对机体内分泌免疫机能的影响。方法：实验对象进行为期5周的递增负荷训练，于集合训练开始前一天和第2周、第3周、第4周及第5周训练结束末36h后上午7：30-8：00取安静时肘静脉血，测定训练前及每一负荷训练阶段后外周血液中内分泌激素指标和免疫指标的变化。结果：T第3周比训练前显著升高（P〈0．05），C第3、第5周比训练前显著升高（P〈0．05），T／C比值第4周比训练前显著下降（P〈0．05）。CD4第2周比训练前显著下降（P〈0．05），而第3周比训练前显著升高（P〈0．05）；CDB第4周比训练前、第2周、第3周显著下降（P〈0．05），CD4／CDB比值第3、第4周均比训练前、第2周显著升高（P〈0．05）。结论：训练负荷是影响机体内分泌免疫机能的一个重要因素，中等负荷训练促进机体内分泌免疫机能，大负荷训练会降低机体的内分泌免疫机能，但随着对递增负荷应激的适应，机体的内分泌免疫机能又会得到加强。  相似文献   

补充BCAA对划船运动员血激素的影响   总被引：1，自引：0，他引：1  

刘建红  周志宏  欧明毫  王奎 《军事体育进修学院学报》2003,22(4):15-17

本研究探讨了在冬训期间，补充一个月的BCAA的实验结果表明，补充BCAA有利于维持训练负荷过程中血睾酮水平的稳定，提高睾酮／皮质醇比值，促进体内生长激素的分泌，说明补充BCAA对内分泌代谢的影响主要是影响一些合成代谢激素的反应，如血睾酮和生长激素等，从而有利于运动机能的提高和加快疲劳的消除。  相似文献