Acute effects of exercise and active video games on adults’ reaction time and perceived exertion     

José F. Guzmán  Jesús López-García 《European Journal of Sport Science》2016,16(8):1197-1203

The purpose of the present study was to examine the acute effects of resting, aerobic exercise practised alone, and aerobic exercise with active video games (AVG), on complex reaction time (CRT) and the post-exercise acute rate of perceived exertion (RPE) in young healthy adults. The experimental group was composed of 92 healthy young adults, 78 males and 13 females (age M?=?21.9?±?2.7 years) who completed two sessions, A and B. In session A, participants rode 30?min on an ergometer, while in session B they exercised for 30?min on an ergometer while playing an AVG on a Wii. The control group was composed of 30 young adults, 26 males and 4 females (age M?=?21.4?±?2.9 years) who rested for 30?min. In each session, a CRT task was performed before and after exercising or resting, and post-exercise global RPE was noted. Repeated measures general linear model (GLM) and Wilcoxon tests were performed. (1) Both aerobic exercise alone and aerobic exercise combined with AVG improved CRT, while resting did not; (2) aerobic exercise combined with AVG did not improve CRT more than aerobic exercise only; and (3) RPE was lower after aerobic exercise combined with AVG compared with aerobic exercise only. In young adults, exercise produces acute benefits on CRT, and practising exercise with AVG helps to decrease RPE.  相似文献   

Muscle activation,blood lactate,and perceived exertion responses to changing resistance training programming variables     

Daniel J. Hiscock  Brian Dawson  Cyril J. Donnelly  Peter Peeling 《European Journal of Sport Science》2016,16(5):536-544

Ratings of perceived exertion (RPE: 0–10) during resistance training with varying programming demands were examined. Blood lactate (BLa) and muscle activation (using surface electromyography: EMG) were measured as potential mediators of RPE responses. Participants performed three sets of single arm (preferred side) bicep curls at 70% of 1 repetition maximum over 4 trials: Trial (A) 3 sets?×?8 repetitions?×?120?s recovery between sets; (B) 3 sets?×?8 repetitions?×?240?s recovery; (C) 3 sets?×?maximum number of repetitions (MNR)?×?120?s recovery; (D) 3 sets?×?MNR?×?240?s recovery. Overall body (RPE-O) and active muscle (RPE-AM) perceptual responses were assessed following each set in each trial. Biceps brachii and brachioradialis muscle EMG was measured during each set for each trial. RPE-O and RPE-AM were not different between Trial A (3.5?±?1 and 6?±?1, respectively) and Trial B (3.5?±?1 and 5.5?±?1, respectively) (p?p?相似文献   

Sleep monitoring of a six-day microcycle in strength and high-intensity training     

Sarah Kölling  Thimo Wiewelhove  Christian Raeder  Stefan Endler  Alexander Ferrauti  Tim Meyer 《European Journal of Sport Science》2016,16(5):507-515

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南海及周边地区的战略态势与中国对策   总被引：1，自引：0，他引：1  

刘志鹏 《成都教育学院学报》2004,18(12):52-57

著名的"海权论"创立者马汉认为:谁控制海洋和海上通道,谁就能控制世界.南海自古以来就是中国的领土,由于其多方面的战略价值,南海周边各国与中国在岛礁和海域划分上存在分歧和争端,才形成所谓的"南海问题".中国政府根据不同历史时期的国内外形势,提出了相应的南海政策.目前,世界各大国和各种力量纷纷介入南海及周边地区,甚至威胁到中国的主权和领土.鉴于此,中国应继续从"稳定周边"的大局出发,在坚持"搁置争议"的基础上,进一步提出和实施积极有效的方针政策,促进这一地区的稳定和发展.  相似文献   

论高校投掷运动员训练疲劳与恢复方法     

冯青林 《鄂州大学学报》2007,14(5):72-75

该文分析了对高校投掷运动员疲劳产生的原因,并提出有效的恢复手段和方法,对科学合理地制定训练计划和比赛有一定的实用价值。  相似文献   

Isometric quadriceps strength determines sailing performance and neuromuscular fatigue during an upwind sailing emulation     

Jan G. Bourgois  Margot Callewaert  Bert Celie  Dirk De Clercq  Jan Boone 《Journal of sports sciences》2016,34(10):973-979

This study investigates the physiological responses to upwind sailing on a laser emulation ergometer and analyses the components of the physical profile that determine the physiological responses related to sailing level. Ten male high-level laser sailors performed an upwind sailing test, incremental cycling test and quadriceps strength test. During the upwind sailing test, heart rate (HR), oxygen uptake, ventilation, respiratory exchange ratio, rating of perceived exertion (RPE) and lactate concentration were measured, combined with near-infrared spectroscopy (NIRS) and electromyography (EMG) registration of the M. Vastus lateralis. Repeated measures ANOVA showed for the cardio-respiratory, metabolic and muscles responses (mean power frequency [MPF], root mean square [RMS], deoxy[Hb+Mb]) during the upwind sailing test an initial significant increase followed by a stabilisation, despite a constant increase in RPE. Stepwise regression analysis showed that better sailing level was for 46.5% predicted by lower MPF decrease. Lower MPF decrease was for 57.8% predicted by a higher maximal isometric quadriceps strength. In conclusion, this study indicates that higher sailing level was mainly determined by a lower rate of neuromuscular fatigue during the upwind sailing test (as indicated by MPF decrease). Additionally, the level of neuromuscular fatigue was mainly determined by higher maximal isometric quadriceps strength stressing the importance of resistance training in the planning of training.  相似文献   

The effect of time constraints and running phases on combined event pistol shooting performance     

Clare Dadswell  Carl Payton  Paul Holmes  Adrian Burden 《Journal of sports sciences》2016,34(11):1044-1050

The combined event is a crucial aspect of the modern pentathlon competition, but little is known about how shooting performance changes through the event. This study aimed to identify (i) how performance-related variables changed within each shooting series and (ii) how performance-related variables changed between each shooting series. Seventeen modern pentathletes completed combined event trials. An optoelectronic shooting system recorded score and pistol movement, and force platforms recorded centre of pressure movement 1 s prior to every shot. Heart rate and blood lactate values were recorded throughout the event. Whilst heart rate and blood lactate significantly increased between series (P < 0.05), there were no accompanying changes in the time period that participants spent aiming at the target, shot score, pistol movement or centre of pressure movement (P > 0.05). Thus, combined event shooting performance following each running phase appears similar to shooting performance following only 20 m of running. This finding has potential implications for the way in which modern pentathletes train for combined event shooting, and highlights the need for modern pentathletes to establish new methods with which to enhance shooting accuracy.  相似文献   

某型机机翼油箱壁板过油孔压印强化疲劳对比工艺试验研究     

王海宏 《实验室研究与探索》2007,(11)

某型机机翼油箱壁板研制中采用了压印强化新工艺。本工艺试验的目的是通过对不同压印深度的疲劳试验数据进行分析和研究,掌握压印深度与疲劳性能的关系,为设计和工艺提供直接依据。  相似文献   

在役管道材料的低周疲劳性能测试   总被引：1，自引：0，他引：1  

李亚平  焦中良  帅健 《实验室研究与探索》2007,(11)

对在役输油管道的X60材料进行了低周疲劳性能测试。拟合得到管道材料的应变-寿命曲线公式,依据管道材料的低周疲劳性能,预测该输油管道的疲劳寿命,为管道的安全维护提供了依据。  相似文献   

钙与运动性疲劳     

张耀斌  李洁 《西安文理学院学报》2007,10(2):43-46

目前,有关钙离子代谢与运动性肌肉疲劳的研究十分活跃,但都是从线粒体、肌浆网单方面因素考虑的.本文旨把有关钙与运动性肌肉疲劳的线粒体、肌浆网的孤立研究联系起来,通过综述方法从线粒体钙、肌浆网钙两个方面具体阐述运动性肌肉疲劳产生的机制.结果表明,线粒体钙和肌浆网钙在运动性肌肉疲劳中起重要作用,并且二者的作用不是孤立的而是联系起来的.  相似文献