首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到19条相似文献，搜索用时 252 毫秒
1.
目的探讨递增负荷运动至力竭后补充镇江香醋对消除疲劳及相关生化指标变化的影响.方法研究对象为18名日本国士馆大学体育学院在校优秀的男田径运动员,在不同时间(相隔1周)进行两次递增负荷运动,到力竭后即刻,分别补充蒸馏水和镇江香醋溶液,对两次实验进行自身对照.运动后补充蒸馏水为C组,运动后补镇江香醋稀释溶液为V组.并且测试运动员血乳酸、血氨浓度、血气等指标的变化情况.结果V组与C组在消除血乳酸速率、血液pH值和HCO3-浓度等指标上有显著差异(P＜0.05),清除血氨浓度的变化也存在显著差异(P＜0.05).结论外源性补充镇江香醋溶液可以加快运动后血乳酸的消除速率,提高血液缓冲能力,缓解体内代谢性酸中毒的发生,从而促进运动性疲劳的恢复.  相似文献   

2.
刘建红 《安徽体育科技》2002,23(4):56-57,60
为探讨桑拿蒸气浴对运动后血乳酸代谢的效果,三组运动员在运动后分别进行30min桑拿蒸汽浴、一般性的整理活动和静坐休息.结果提示:运动前、运动后即刻血乳酸没有明显的差异(p＜0.05),但在恢复30min后,一般整理活动组明显低于静坐休息组(p＜0.05),桑拿蒸汽浴组均明显低于一般整理活动组和静坐体息组(p＜0.05).结论:运动后进行适当桑拿蒸汽浴有利于血乳酸的代谢和体能的恢复.  相似文献   

3.
运动后乳酸清除率与运动能力的关系   总被引：7，自引：0，他引：7  
测定中跑运动员、足球运动员和常人在800m全力跑后的血乳酸浓度、乳酸清除率和心率恢复率，研究无氧运动能力与最高乳酸值、心率恢复率与乳酸清除率之间的关系。结果发现：运动员的无氧耐力成绩和运动后5min血乳酸值呈显著负相关；中跑运动员较足球运动员和常人有更强的产生乳酸能力和更高的乳酸清除率；心率的恢复速度较乳酸清除率更快。说明良好的产生乳酸能力是无氧耐力成绩的重要因素，良好的乳酸清除率有利于乳酸的清除和运动后的恢复，同时运动后的心率恢复率并不能反映体内乳酸的清除情况。  相似文献   

4.
目的:找到有效的陆地恢复性有氧训练手段,促进速滑运动员体能恢复.方法:运用实验法先后将12名优秀速度滑冰运动员分为对照组、亚乳酸阈、130～140次/min、110～120次/min匀速有氧跑组、个体乳酸阈心率-(30～35)次/min和110～120次/min自行车组,在2010年全国速滑联赛哈尔滨站赛后测试不同时间点血乳酸、肌酸激酶、肾上腺素等生化指标,分析对比不同恢复训练对血液生化指标的影响.结果:速滑运动员赛后血乳酸峰值出现在5～10 min,且随运动距离不同而存在差异;亚乳酸阈强度匀速有氧跑能有效促进乳酸消除,运动安排适宜时间为20～25员min,也有助于运动后血清肾上腺素恢复;个体乳酸阈心率-(30～35)次/min自行车恢复训练乳酸清除速率及肾上腺素恢复较110～120次/min快,25～30 min乳酸基本恢复,但肾上腺素恢复较亚乳酸阈强度匀速有氧跑差;不同恢复组赛后血清CK差异不大.结论:个体乳酸阈心率-(30～35)次/min自行车恢复训练是上述恢复手段中效果最佳的陆地恢复方式,能有效促进速度滑冰运动员疲劳的消除;亚乳酸阈强度匀速有氧跑可促进植物神经系统恢复.  相似文献   

5.
目的:观察间歇性低氧训练对跆拳道运动员血氨、血乳酸及血气水平的影响.方法:20名16～18岁3～6段男性跆拳道运动员随机分为试验组及对照组,每组10人.试验组接受间歇性低氧训练;对照组除间歇性低氧暴露干预外,其余训练内容与实验组相同.4周训练后两组受试者进行大强度3min踢腿运动,观察血氨、血乳酸及血气指标的变化.结果:3min踢腿运动后实验组血氨、血乳酸水平较对照组显著升高;血PaC02及HCO3-值较对照组显著下降.结论:4周间歇性低氧训练可以改善青少年跆拳道运动员的磷酸原及糖酵解供能能力.  相似文献   

6.
不同水平女子拳击运动员无氧代谢能力特征研究   总被引：3，自引：0，他引：3  
为探讨不同水平女子拳击运动员无氧代谢能力特征及其差异,对24名女子拳击运动员进行30s无氧功测试(采用Monark839E功率自行车),并测定其运动后即刻、3min、5min、7min的心率和血乳酸.研究发现高水平运动员经过系统专业训练后,其机体的无氧代谢能力明显优于低水平运动员;恢复期高水平组运动员心率恢复较快是运动员经多年系统训练对运动适应的重要表现;高水平和中等水平运动员机体乳酸缓冲系统和消除系统机能好,无氧代谢恢复能力较强.  相似文献   

7.
蜂王浆对大鼠力竭运动能力的影响   总被引：11，自引：0，他引：11  
赵光 《体育学刊》2003,10(3):33-36
探讨服用蜂王浆的大鼠，作力竭运动时，减轻和防止自由基对机体组织的损伤和抗疲劳作用。灌喂蜂王浆的大鼠为试验组与对照组比较，测试二组在力竭运动时体重、运动能力、线粒体丙二醛(MDA)、超氧化物歧化酶(SOD)、血浆pH值、血乳酸、血清总钙ATP的合成能力以及肝、肌糖原的变化。研究表明实验组的体重明显增加，运动能力显提高，MDA降低明显，SOD活性显增高，ATP和pH值相应提高，血乳酸和血清总钙较低，肝、肌糖原明显增多。蜂王浆作为一种有效的体能恢复剂有广泛的应用前景。  相似文献   

8.
目的:探讨不同恢复手段对一次大强度训练后田径运动员血乳酸(BLA)清除的影响,以明确大强度训练间歇期最佳恢复手段与强度,为提高运动员的训练效果提供依据.方法:15名青年专业田径运动员通过递增负荷运动实验测试最大摄氧量(VO2max)和乳酸阈(LAT).1周后,以90％VOmax强度运动5min,运动后即刻分别进行消极性恢复(0％LAT)和4种强度的积极性恢复(100％、80％、60％和40％ LAT).于运动前安静时、运动后即刻以及恢复过程中每4 min取1次指血测定BLA,直到BLA恢复至安静水平.比较各组恢复期BLA清除速率以及BLA清除2/3所需时间(t2/3).结果:恢复期0～20 min各时间点消极性恢复组(0％ LAT) BLA均高于各积极性恢复组(P＜0.05),而40％ LAT组则高于60％ LAT组(P＜0.05),后两者均高于80％LAT组和100％ LAT组(P＜0.05).80％ LAT组和100％LAT组恢复期各时间点均无显著性差异(P＞0.05).消极性恢复组(0％LAT)在运动后24 min、40％LAT组在运动后20 min、60％ LAT组在运动后16 min、80％ LAT组和100％ LAT组均在运动后12min恢复至安静时水平.积极性恢复各组t2/3均低于消极性恢复组(P＜0.05),60％ LAT组t2/3高于40％ LAT组(P＜0.05),80％ LAT组和100％ LAT组t2/3均低于60％ LAT组和40％LAT组(P＜0.05),而80％ LAT组和100％LAT组t2/3则无显著性差异(P＞0.05).结论:大强度训练后进行积极性恢复对于BLA清除的效果明显优于消极性恢复,BLA清除速率依赖于积极性恢复的强度,两者呈剂量反应关系,且以达到或接近个体LAT强度进行积极性恢复的效果最佳.  相似文献   

9.
利用血乳酸测定仪（ Lactate Pro LT -1710LT）对男子冰球运动员训练后主动和被动恢复血乳酸的清除率比较的研究,为提高男子冰球运动员训练效果提供科学依据,采用血乳酸测试法、心率测试法、摄像分析法、文献资料法等研究法,分析主动和被动恢复血乳酸值与脉搏之间的关系,科学安排训练内容,使运动员训练效果得到提高,其分析结果显示男子冰球运动员训练后主动恢复较被动恢复血乳酸清除率较快,心率恢复差别不明显。  相似文献   

10.
叶春  罗晶  许豪文  何执静 《体育科学》2005,25(9):53-55,82
实验旨在观察预热休克对一次性大负荷运动造成大鼠骨骼肌运动性损伤是否具有保护作用。实验采用大鼠热休克模型,用物理加热方法使大鼠体温升高到40.5℃~41.5℃,持续10~15min,在室温下恢复24h后进行一次性大负荷运动(速度为27m/min,坡度0°,时间为90min)。通过对比预热和室温组大鼠运动后即刻、24h、48h血清中的肌酸激酶(CK)、乳酸脱氢酶(LDH),来确定预热休克对大鼠运动所致骨骼肌损伤是否具有保护作用,以及是否能够加速骨骼肌运动性损伤的恢复。结果发现,预热组运动后即刻、24h,血清中激酶和乳酸脱氢酶活性均比室温组低(P<0.05);运动后48h,预热组较室温组血清中肌酸激酶和乳酸脱氢酶活性略低,没有显著性差异,两组肌酸激酶值比室温基础组略高,也没有显著性差异;预热运动后48h组乳酸脱氢酶与室温基础组相比略高,没有显著性差异;室温运动后48h组乳酸脱氢酶较室温基础组明显偏高,具有显著性差异(P<0.05)。提示,预热休克对于一次性大负荷运动所致的大鼠骨骼肌运动性损伤具有保护作用,并且能够促进骨骼肌运动性损伤的恢复。  相似文献   

11.
We test the hypothesis that breathing oxygen-enriched air (F(I)O(2) = 100%) maintains exercise performance and reduces fatigue during intervals of maximal-intensity cycling. Ten well-trained male cyclists (age 25 ± 3 years; peak oxygen uptake 64.8 ± 6.2 ml · kg(-1) · min(-1); mean ± s) were exposed to either hyperoxic or normoxic air during the 6-min intervals between five 30-s sessions of cycling at maximal intensity. The concentrations of lactate and hydrogen ions [H(+)], pH, base excess, oxygen partial pressure, and oxygen saturation in the blood were assessed before and after these sprints. The peak (P = 0.62) and mean power outputs (P = 0.83) with hyperoxic and normoxic air did not differ. The partial pressure of oxygen was 4.2-fold higher after inhaling hyperoxic air, whereas lactate concentration, pH, [H(+)], and base excess (P ≥ 0.17) were not influenced. Perceived exertion towards the end of the 6-min periods after the fourth and fifth sprints (P < 0.05) was lower with hyperoxia than normoxia (P < 0.05). These findings demonstrate that the peak and mean power outputs of athletes performing intervals of maximal-intensity cycling are not improved by inhalation of oxygen-enriched air during recovery.  相似文献   

12.
We examined the effects of pre-exercise sodium bicarbonate (NaHCO3) ingestion on the slow component of oxygen uptake (VO2) kinetics in seven professional road cyclists during intense exercise. One hour after ingesting either a placebo or NaHCO3 (0.3 g x kg body mass(-1)), each cyclist (age, 25 +/- 2 years; VO2max, 74.7 +/- 5.9 ml x kg(-1) x min(-1); mean +/- s) performed two bouts of 6 min duration at an intensity of 90% VO2max interspersed by 8 min of active recovery. Gas exchange and blood data (pH, blood lactate concentration and [HCO3-]) were collected during the tests. In both bouts, the slow component of VO2 was defined as the difference between end-exercise VO2 and the VO2 at the end of the third minute. No significant difference was found in the slow component of VO2 between conditions in the first (NaHCO3, 210 +/- 69 ml; placebo, 239 +/- 105 ml) or second trial (NaHCO3, 123 +/- 88 ml; placebo, 197 +/- 101 ml). In conclusion, pre-exercise NaHCO3 ingestion did not significantly attenuate the VO2 slow component of professional road cyclists during high-intensity exercise.  相似文献   

13.
Eight trained male cyclists who competed regularly in track races, were studied under control, alkalotic (NaHCO3) and placebo (CaCO3) conditions in a laboratory setting to study the effect of orally induced metabolic alkalosis on 60 s anaerobic work and power output on a bicycle ergometer. Basal, pre- and post-exercise blood samples in the three conditions were analysed for pH, pCO2, pO2, bicarbonate, base excess and lactate. All blood gas measurements were within normal limits at basal levels. There were significant differences in the amount of work produced, and in the maximal power output produced by the cyclists in the experimental condition when compared to the control and placebo conditions (P less than 0.01). The post-exercise pH decreased in all three conditions (P less than 0.05) and post-exercise pCO2 increased significantly in the alkalosis trial (P less than 0.01). In the alkalotic condition, the pre-exercise base excess and HCO3- levels were both higher (P less than 0.05) than the basal levels, suggesting that the bicarbonate ingestion had a significant increase in the buffering ability of the blood. Post-exercise lactate levels were significantly higher (P less than 0.05) after the alkalotic trial when compared to the other two conditions, immediately post-exercise and for the next 3 min. Post-exercise lactate levels were higher than basal or pre-exercise levels (P less than 0.001). This was true immediately post-exercise and for the next 5 min. The results of this study suggest that NaHCO3 is an effective ergogenic aid when used for typically anaerobic exercise as used in this experiment. We feel that this ergogenic property is probably due to the accelerated efflux of H+ ions from the muscle tissue due to increased extracellular bicarbonate buffering.  相似文献   

14.
研究目的:研究穿着不同压力下肢紧身服对跑步过程中摄氧量以及运动后血乳酸恢复的影响。研究方法:选择北京体育大学12名健康男性长跑爱好者作为研究对象。受试者进行3次递增负荷最大摄氧量测试,在测试期间随机穿戴不同压力的下肢紧身服和普通运动长裤进行测试。最大摄氧量测试采用METAMAX 3B心肺功能测试系统进行测试,根据Bruce测试方案每3 min递增负荷,直至受试者运动至力竭。分别在安静时、运动后1 min、4 min、7 min和10 min 5个时刻测量血乳酸指标。采用Simi Aktisys 3D实验设备进行肌肉震动测试。采用一般线性模型的重复测量统计学方法比较3种情况下各项指标的差异。研究结果:运动过程中,高压力下肢紧身服在第二负荷上的耗氧量显著减小(P=0.047),但在其他负荷的耗氧量以及最大摄氧量没有出现显著性的差异。不同压力下肢紧身服对乳酸最大值以及乳酸消除速率没有产生显著性的影响。不同压力下肢紧身服均能够显著减小股四头肌、股二头肌和腓肠肌的肌肉震动(P=0.017、P=0.012、P=0.028),并且压力较大的下肢紧身服对肌肉的固定效果更好。研究结论:不同压力下肢紧身服对一次性高强度跑步运动过程中的最大摄氧量没有显著性的影响,但有可能在一定运动强度范围内减少运动过程中氧气的消耗。下肢紧身服对一次性高强度跑步运动后乳酸恢复没有显著性的影响。下肢紧身服能够降低肌肉的额外震动,并且压力越大,效果越好。  相似文献   

15.
Abstract

In order to examine the effects of different recoveries from high intensity short duration exercise on lactate removal and subsequent performance, 11 subjects completed 8 experimental sessions. Each subject completed an initial all-out pedaling task against 5.5 kg resistance (Monark bicycle ergometer) for 1 min followed by a randomly assigned recovery pattern and a repeat of the all-out exercise task. The main effects examined were active (1.0 kg, 60 rpm) vs passive recovery, inhalation of inhalation of oxygen vs room air during recovery, and 10- vs-20-min duration of recovery. Pedal revolutions were analyzed on a 6- by 6-sec and on a cumulative basis. Blood lactate concentrations were determined during rest, the 3rd–4th, 9th–10th, and 19th–20th min of recovery. Results revealed significant main effects for active vs passive recovery and for 10- vs 20-min recovery, with active and 20-min recovery resulting in significantly higher postrecovery pedal revolutions (p < .001) and enhanced rates of lactate removal during recovery (p < .001). Oxygen inhalation during recovery had no effect on postrecovery performance or lactate removal (p > .05). The correlation between blood lactate levels at the end of recovery and pedal revolutions on the postrecovery exercise task was only r = -.19, suggesting that factors other than lactate removal are critical for subsequent performance.  相似文献   

16.
The effects of antioxidant diet supplements on blood lactate concentration and on the aerobic and anaerobic thresholds and their adaptations to training were analysed. Fifteen amateur male athletes were randomly assigned to either a placebo group or an antioxidant-supplemented group (90 days supplementation with 500 mg x day(-1) of vitamin E and 30 mg x day(-1) of beta-carotene, and the last 15 days also with 1 g x day(-1) of vitamin C). Before and after the antioxidant supplements, the sportsmen performed a maximal exercise test on a cycle ergometer and maximal and submaximal physiological parameters were assessed together with blood lactate concentration. Maximal oxygen uptake (VO(2max)), maximal blood lactate concentration, and the maximal workload attained rose significantly in both groups after the 3 months of training. At the end of the study, maximal blood lactate concentration was lower in the group that took supplements than in the placebo group. The percentage of VO(2max) attained at the anaerobic threshold rose significantly in both groups after 3 months of training, although the final value in the supplemented group was higher than that in the placebo group. Antioxidant diet supplements induced lower increases in blood lactate concentration after a maximal exercise test and could improve the efficiency in which aerobic energy is obtained.  相似文献   

17.
红细胞膜带3 蛋白与运动研究展望   总被引：4，自引：0，他引：4  
红细胞运输氧和二氧化碳的基础是带3蛋白介导的CI^-／HCO^3-转运。带3蛋白还有调节红细胞糖酵解速率、变形能力和介导红细胞清除功能。运动引起的血乳酸、自由基、内环境变化和能量消耗可影响带3蛋白的功能。  相似文献   

18.
The purpose of this study was to determine the effects of the simultaneous use of pyridoxine-alpha-ketoglutarate (PAK) and sodium bicarbonate (NaHCO3) on short-term maximal exercise capacity in eight well-trained male cyclists. The study consisted of the determination of maximal power output and the administration of various combinations of placebos, PAK and NaHCO3, followed by a short-term maximal exercise test. To determine maximal power output (power(max)), the subjects performed a continuous, incremental test on a Monark bicycle ergometer to symptom limited maximum (test 1). To determine the effects of NaHCO3 and PAK on short-term maximal exercise performance, the subjects were administered either placebo (PLA), PAK and sodium bicarbonate (P/B), PAK and placebo (PAK), or sodium bicarbonate and placebo (BIC) prior to performing short-term maximal exercise (test 2). Oral tablets of NaHCO3 and PAK were given in doses of 200 mg kg-1 and 50 mg kg-1 respectively. The subjects pedalled at the power output corresponding to 100% of their VO2 max at 70 rev min-1 until voluntary cessation or until they were unable to maintain pedal revolution rate. Venous blood samples were drawn at rest (RES), cessation of exercise (CES) and after 2 min of recovery (REC) and analysed for lactate, pH and bicarbonate ion concentration. The subjects attained an average maximum power output of 377 +/- 20 W during the graded maximal pre-test (test 1). There were no significant differences between treatments in the ability to sustain power(max) during test 2. During test 2, the subjects were able to sustain power(max) for 7.6 +/- 4.3 min with P/B, 6.7 +/- 2.9 min with PAK, 7.3 +/- 4.9 min with BIC and 6.9 +/- 2.7 min with placebo (mean +/- S.E.). Blood lactate (BLa) was significantly elevated at cessation of exercise and remained elevated during recovery, but there were no significant differences between treatments. Bicarbonate fell significantly during exercise and recovery in each treatment. At rest, bicarbonate levels were significantly higher in both the P/B and BIC than in the PAK or PLA treatments. Pooled data from the P/B and BIC treatments demonstrated a significant increase in pH at rest and end of exercise when compared to PLA treatment. These data suggest that sodium bicarbonate rather than PAK was responsible for this increase. In summary, our data suggest that in the dosages used in this study, administration of sodium bicarbonate or PAK, alone or in combination, is ineffective in increasing short-term maximal exercise capacity.  相似文献   

19.
该研究旨在观察乳酸阈强度训练提升超重女大学生心肺机能和改善身体成分的效果。方法：通过递增负荷实验测定超重女大学生个体乳酸阈，绘制血乳酸-走跑强度动力曲线，依此确定运动干预强度及设计运动方案；受试者进行12周乳酸阈强度运动训练；测定实验前后身体成分、肺活量、最大摄氧量、超声心动等指标进行与对照组的对比分析。结果显示：超重女大学生个体乳酸阈为3.75±0.91mmol/L，乳酸阈强度为6.91±0.88km/h，乳酸阈强度训练靶心率为137±12.2次/min；实验组训练后，体脂%、腹部脂肪含量等非常显著的下降，最大摄氧量、肺活量、每博输出量、射血分数显著性提升；对照组无明显变化。结论：12周乳酸阈强度运动锻炼可显著改善超重女大学生的心肺机能和身体成分；本研究得出的乳酸阈强度可作为超重女大学生有氧健身的参考强度。  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号