共查询到18条相似文献，搜索用时 843 毫秒
1.
通过对体院60名学生不同短段落跑后的血乳酸值和100m跑后的血乳酸值的测定与分析,发现糖酵解供能能力在100m跑中占有重要地位,不同短段落跑后的血乳酸值在随着跑距的延长逐渐升高的过程中,存在着一个急剧升高的阶段。在本实验中,该阶段大约出现在45m～60m之间,这一现象对短跑运动员的训练和选材有着特殊的意义,血乳酸急剧升高之前的段落,主要由磷酸原系统提供能量。在短距离跑项目的选材中,可用该段落跑的成绩和血乳酸值共同评价运动员的速度力量水平,成绩好且血乳酸值低的运动员应作为重点对象加以考察。血乳酸急剧升高之后的段落,主要由磷酸原系统提供能量。在短距离跑项目的选材中,可用该段落跑的成绩和血乳酸值共同评价运动员的速度力量水平,成绩好且血乳酸值低的运动员应作为重点对象加以考察。血乳酸急剧升高之后的段落,主要由糖酵解系统供能。该段落的成绩好且血乳酸值高,说明其糖酵解系统供能能力强,发展速度耐力有潜力。 相似文献
2.
文章主要对高校优秀短跑运动员进行不同距离的速度练习后的血乳酸进行研究,经测试结果发现,30m-40m重复跑每次跑后的血乳酸无显著性差异,45m-60m距离跑后血乳酸急剧升高,形成血乳酸激增的转折阶段,60m与80m重复跑每次跑后的血乳酸值亦无显著差异,但60m和80m跑段的血乳酸值与30m-45m相比,差异非常显著。在此30m-45m距离是发展磷酸原系统供能能力的最适跑距,之后的60-80m主要发展速度耐力。 相似文献
3.
通过对30名不同水平的体育系学生100m跑和不同段落重复跑后的血乳酸测定，发现不同水平受试100m跑后都存在着不同程度的血乳酸堆积，且受试的训练水平对血乳酸值有显影响。不同段落重复跑后的血乳酸值在随跑距延长而逐渐升高的过程中，存在着一个急剧升高的阶段，因此，乳酸能系统在100m跑中发挥着重要的作用。 相似文献
4.
5.
不同训练手段对机体无氧代谢能力的影响 总被引：1，自引：0，他引：1
采用实验法，测试了不同训练手段下的血乳酸值。结果发现．45—60m段落跑后血乳酸急剧升高，形成血乳酸激增的“转折”阶段；30-45m段落是发展磷酸原系统供能能力的最适跑距；60-80m主要发展速度耐力。实验组经过10周不同段落的训练后．其非乳酸能和乳酸能供能能力、100m跑成绩、PAP、AAP发生了不同的反应，并于训练前和对照组相比均有显著提高。同时表明，10s超极量强度无氧训练法并不能明显提高磷酸原系统的供能能力。 相似文献
6.
大鼠过度训练时间与血乳酸值变化的关系探讨 总被引：2，自引：0，他引：2
本文通过大鼠高强度大运动量训练模拟过度训练并进行血乳酸值测定和运动时间动态观察，结果表明：整个训练期间运动后血乳酸值均较对照组显著升高（Ｐ＜０．０１），后期升高幅度较早期、中期显著下降（Ｐ＜０．０５）；每天的运动时间早期到中期逐渐增加，后期显著下降（Ｐ＜０．０５）。因而初步提出了血乳酸值下降的变化可能是过度训练的早期反应，运动能力提高的同时可能潜在过度训练的发生。 相似文献
7.
8.
运动训练中,选择适宜的运动强度提高训练效果和运动成绩,是当前训练负荷发展的总趋势。为分析乳酸与短跑能力的关系和乳酸与短跑运动代谢特点及乳酸在选材中的应用,运用文献资料法分析短跑运动中的乳酸变化,结果发现短跑运动后的血乳酸浓度与运动强度、运动量、训练水平、糖原含量以及缺氧等因素有着密切的关系。高水平运动员的最大血乳酸值高。利用血乳酸指标能够反应不同运动方式及不同运动强度下能量供应情况和机体耐受情况,反映运动训练的水平,可广泛应用于短跑运动训练的监控和选材中。可考虑将45-60米段落跑的成绩和血乳酸值共同评价运动员的速度水平,成绩好且血乳酸值低的运动员应作为重点对象加以考察;将80米的成绩与其血乳酸值结合起来,共同评价运动员的速度耐力水平。 相似文献
9.
10.
短距离冲刺跑与中距离重复跑对血氨及血乳酸水平的影响及其特点 总被引：6，自引：0，他引：6
6名短跑及8名中跑运动员分别完成300m冲刺跑及2×800m最大速度跑,于运动前5min、完成后即刻、完成后4min直至22min(间隔时间3min)分别采血测定血氨及血乳酸含量。结果显示,300m冲刺跑及2×800m中距离重复跑均可导致机体血氨水平显著增高,血氨水平与运动强度具有正相依存关系,血氨峰值出现的时间以运动后4-7min为多,均滞后于血乳酸峰值。血氨可以作为监测运动强度的敏感指标,并与血乳酸具有显著的相关关系。受试者血氨水平的增高与其机体机能状态及疲劳程度密切相关。 相似文献
11.
采用Wingate无氧试验法,用894E奋力蹬车10s、30s、60s以及在839E上用递增负荷的方法对国家速滑队运动员的无氧功、无氧阈功率、运动后3min、6min、9min血乳酸进行测定。结果表明,10s、30s、60s无氧功试验以及运动后血乳酸的测试能较好评价速滑运动员磷酸原供能系统和糖酵解供能系统的供能能力,同时也反映速滑运动员的无氧功和无氧能力;无氧阈功率能较好地反映速滑运动员的有氧代谢能力,可用于对训练效果的评定和对训练过程的监控;在评价速滑运动员的无氧功时,应优先考虑其无氧功的绝对值。 相似文献
12.
对田径、赛艇运动员下肢等负荷多组力量训练强度的研究 总被引：1，自引：1，他引：0
对43名2级以上运动员进行了50％／Fmax负重，20次／组，组间歇1min，共5组力量耐力测试。采集并测定安静和每组运动员练习后即刻的心率和血乳酸，测定了每一位受试对象每一次深蹲的蹲起速度。所有测试对象对该练习强度均产生较大的生理反应，血乳酸和心率在第2组练习后出现快速上升，蹲起速度则均表现出不同程度的下降趋势。不同专项运动员对等负荷多组力量耐力训练具有不同的反应，田径跳跃运动员对测试的强度表现出高的生理反应，心率和乳酸水平均达到或接近最大负荷极限，赛艇运动员介于中长跑和跳跃运动员之间，中长跑运动员的反应较低，心率一直保持在140次／min以下，血乳酸值在7mmol／L以下，并显示出典型的血乳酸“平衡状态”。 相似文献
13.
Physiological demands of top-class soccer refereeing in relation to physical capacity: effect of intense intermittent exercise training. 总被引：1，自引：1，他引：0
To examine the activity profile and physiological demands of top-class soccer refereeing, we performed computerized time-motion analyses and measured the heart rate and blood lactate concentration of 27 referees during 43 competitive matches in the two top Danish leagues. To relate match performance to physical capacity and training, several physiological tests were performed before and after intermittent exercise training. Total distance covered was 10.07+/-0.13 km (mean +/- s(x)), of which 1.67+/-0.08 km was high-intensity running. High-intensity running and backwards running decreased (P < 0.05) in the second half. Mean heart rate was 162+/-2 beats min(-1) (85+/-1% of maximal heart rate) and the mean blood lactate concentration was 4.9+/-0.3 (range 1.7-14.0) mmol x l(-1). The amount of high-intensity running during a match was related to the Yo-Yo intermittent recovery test (r2 = 0.57; P<0.05) and the 12 min run (r2 = 0.21; P<0.05). After intermittent training (n = 8), distance covered during high-intensity running was greater (2.06+/-0.13 vs 1.69+/-0.08 km; P< 0.05) and mean heart rate was lower (159+/-1 vs 164+/-2 beats x min(-1); P< 0.05) than before training. The results of the present study demonstrate that: (1) top-class soccer referees have significant aerobic energy expenditure throughout a game and episodes of considerable anaerobic energy turnover; (2) the ability to perform high-intensity running is reduced towards the end of matches; (3) the Yo-Yo intermittent recovery test can be used to evaluate referees' match performance; and (4) intense intermittent exercise training improves referees' performance capacity during a game. 相似文献
14.
To examine the activity profile and physiological demands of top-class soccer refereeing, we performed computerized time-motion analyses and measured the heart rate and blood lactate concentration of 27 referees during 43 competitive matches in the two top Danish leagues. To relate match performance to physical capacity and training, several physiological tests were performed before and after intermittent exercise training. Total distance covered was 10.07 - 0.13 km (mean - s x ), of which 1.67 - 0.08 km was high-intensity running. High-intensity running and backwards running decreased (P ? 0.05) in the second half. Mean heart rate was 162 - 2 beats· min -1 (85 - 1% of maximal heart rate) and the mean blood lactate concentration was 4.9 - 0.3 (range 1.7-14.0) mmol·l -1 . The amount of high-intensity running during a match was related to the Yo-Yo intermittent recovery test ( r 2 = 0.57; P ? 0.05) and the 12 min run ( r 2 = 0.21; P ? 0.05). After intermittent training ( n = 8), distance covered during high-intensity running was greater (2.06 - 0.13 vs 1.69 - 0.08 km; P ? 0.05) and mean heart rate was lower (159 - 1 vs 164 - 2 beats· min -1 ; P ? 0.05) than before training. The results of the present study demonstrate that: (1) top-class soccer referees have significant aerobic energy expenditure throughout a game and episodes of considerable anaerobic energy turnover; (2) the ability to perform high-intensity running is reduced towards the end of matches; (3) the Yo-Yo intermittent recovery test can be used to evaluate referees' match performance; and (4) intense intermittent exercise training improves referees' performance capacity during a game. 相似文献
15.
目的：探讨康复训练后冠心病人进行定量负荷运动时有氧工作能力和心肌供氧的变化，以此为康复效果的评估提供依据。方法：25名男性冠心病人参加了12周有氧多样化运动康复训练，训练前、后对他们在递增负荷运动中的生理和临床指标进行了测定。结果：1）反映冠脉血流和心肌耗氧量的指标RPP，康复训练前在跑台的V级负荷时已超过200，康复训练后增加幅度则有显著下降（P〈0．01）；2）康复训练前受试者的血乳酸浓度（BL）在Ⅳ级运动负荷之后出现了突增（达到4．6mmol／L），而康复训练后他们运动中的BL增加平缓，始终保持较低水平；3）康复训练前在V级运动负荷时受试者的ST下降达到-0．9mm水平，这已接近心肌缺血的阈值，训练后心肌供血出现了明显的改善。结论：康复训练前冠心病人运动中反映运动系统缺氧的BL突增领先于心肌缺血阈值的到达；与康复训练前相比，康复训练后冠心病人在进行相同负荷运动时显示出有氧工作能力有所增强，心肌供氧状况有所改善。 相似文献
16.
To determine the movement patterns and physiological demands of top-class soccer assistant referees, we performed computerized time-motion analysis and measured heart rate and blood lactate concentration in 15 assistant referees during 22 competitive matches in the top Danish league. To relate match performance to the physical capability of the assistant referees, they performed a 3 x 30 m sprint protocol before and after matches and a laboratory treadmill test within 3 weeks of the games. The mean total distance covered by the top-class assistant referees was 7.28 (range 5.78-8.16) km, of which 1.15 (0.86-1.44) km was high-intensity running and 1.16 (0.12-2.34) km was sideways running. The amount of high-intensity running during a game was correlated with performance of repeated sprints (r = 0.80, P < 0.05). Mean heart rate was 137 (117-159) beats x min(-1), corresponding to 73% (60-88%) of maximal heart rate and 65% (53-80%) of maximal oxygen uptake. Blood lactate concentration was 4.7 (1.6-11.0) and 4.8 (1.1-13.7) mmol x 1(-1) after the first and second half, respectively. Sprinting performance was poorer (P < 0.05) after than before the games. The peak distance to the offside line was greater (P < 0.05) in the second than the first half (7 +/- 1 vs 5 +/- 0 m). Our results show that: (1) top-class assistant soccer refereeing is characterized by brief intense bouts of forward and sideways running interspersed with long periods of low activity; (2) top-class soccer assistant referees have moderate aerobic energy production during games with episodes of high aerobic and anaerobic energy turnover; (3) assistant referees' performance of repeated sprints correlates with the amount of high-intensity running performed in a game; and (4) sprint performance decreases towards the end of a game, which appears to affect assistant referees' ability to keep up with play. 相似文献
17.
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
18.
刘洋波 《体育科技文献通报》2013,(10):32-34
以26名优秀男子短跑运动员为研究对象,采用MONARK 894E无氧功率自行车分别进行10s、30s、60s无氧功率测试,并对运动后血乳酸浓度和安静状态、运动中、运动后心率进行测定分析。旨在研究100m、200m、400m优秀男子短跑运动员的磷酸原、糖酵解和混合无氧供能能力的特征。为合理制定发展专项无氧代谢能力的训练计划、科学进行运动监控提供服务。研究结果显示：100m、200m、400m运动员的无氧代谢能力具有显著的项目特征;100m运动员的磷酸原代谢能力最强,200m和400m运动员次之;400m运动员的糖酵乳酸能供能能力强于200m运动员,200m运动员强于100m运动员;100m、200m、400m运动员各自在接近于自己项目所需时间的10s、30s、60s无氧功率测试中均表现出显著的专项特点。 相似文献