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Effects of Compression Garments on Lower Limb muscle activation via Electromyography Analysis during Running

Journal of Donghua University(English Edition) 2015年第1期32卷 48-52页

作者：王萍李磊闫茂德茹锋 School of Electronic and Control Engineering Chang'an University School of Mechanical and Aerospace Engineering Nanyang Technological University

Sports compression garments are common-selected sportswear to improve athletic performance and reduce sports injury. Since they consist of elastic textile that exerts compression and pressure onto the muscle,muscle activation is of interest to sports compression garment manufactures who seek to enhance sports performance through gradient compression garment ***,there are few scientific investigations to explore this effect of muscle activation to evaluate the performance of sports compression garments during sport activity. In this paper, a systemic experimental protocol was presented to improve the quality of evaluation test under a standardized running test. Then muscle activation with and without wearing sport compression garments to highlight the changes caused by compression garment was investigated. The electromyography( EMG) signal was collected and processed by the proposed method to represent the muscle activation combined with gait analysis of running. As a result,the average muscle activation of gait cycle for the major muscles such as rectus femoris( RF) and gastrocnemius medialis( GM) revealed that they needed to exert more muscle force without wearing garment at certain periods for mid-stand and pre-swing phase within gait cycle. These lower muscle activation levels prolonged activity duration,reduced fatigue,and presented low risk for sport *** an evaluation study therefore would scientifically prove the effect of compression garment and provide information on muscle activation and the ergonomic efficacy of gradient compression garment design.

关键词： compression garments muscle activation electromyography(EMG)

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The Effects of Short-Term Resistance Training and Subsequent Detraining on Neuromuscular Function,muscle Cross-Sectional Area,and Lean Mass

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Journal of Science in Sport and Exercise 2022年第3期4卷 237-254页

作者： Pablo B.Costa Trent J.Herda Ashley A.Herda Joel T.Cramer Exercise Physiology Laboratory Department of KinesiologyCalifornia State UniversityFullerton800 N.State College Blvd.FullertonCA 92831USA Department of Health Sportand Exercise SciencesUniversity of KansasLawrenceKSUSA College of Health Sciences University of Texas at El PasoEl PasoTXUSA

Purpose To examine and compare the effects of three days of dynamic constant external resistance(DCER)and isokinetic(ISOK)training and subsequent detraining on thigh muscle cross-sectional area(TMCSA)and thigh lean mass(TLM),ISOK peak torque(PT),DCER strength,isometric force,muscle activation,and percent voluntary activation(%VA).Methods Thirty-one apparently-healthy untrained men(mean±SD age=22.2±4.2 years;body mass=77.9±12.9 kg;height=173.9±5.4 cm)were randomly assigned to a DCER training group(n=11),ISOK training group(n=10)or control(CONT)group(n=10).Subjects visited the laboratory eight *** first visit was a familiarization session,the second visit was a pre-training assessment,the subsequent three visits were for unilateral training of the quadriceps(if assigned to a training group),and the last three visits were the post-training assessments conducted at three days,one week,and two weeks after training *** DCER strength increased from pre-to post-training assessment 1 in both limbs for the DCER group only,and remained elevated during post-training assessments 2 and 3(P<0.05).In addition,surface EMG for the biceps femoris was higher at post-training assessment 3 than at the pre-training assessment,and post-training assessments 1 and 2(P<0.05).No other training-related changes were *** The primary finding of this study was that DCER strength of the trained and untrained limbs can be increased with three days of *** has important implications for injury rehabilitation,where in the initial period post-injury strength gains on an injured limb can possibly be obtained with short-term contralateral resistance training.

关键词： Twitch interpolation Electromyography muscle activation Strength training Injury rehabilitation

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Effects of compression garments on surface EMG and physiological responses during and after distance running

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Journal of Sport and Health Science 2020年第6期9卷 685-691页

作者： Wei-Chun Hsu Li-Wen Tseng Fu-Chun Chen Li-Chu Wang Wen-Wen Yang Yi-Jia Lin Chiang Liu Graduate Institute of Biomedical Engineering National Taiwan University of Science and TechnologyTaipeiTaiwan 10607China National Defense Medical Center TaipeiTaiwan 11466China Graduate Institute of Sports Equipment Technology University of TaipeiTaipeiTaiwan 11153China Taiwan Textile Research Institute New Taipei CityTaiwan 23674China

Background:The few previous studies that focused on the effects of compression garments(CG)on distance running performance have simultaneously measured electromyogram,physiological,and perceptual ***,this study investigated the effects of CG on muscle activation and median frequency during and after distance running,as well as blood-lactate concentration and rating of perceived exertion(RPE)during distance ***:Eight healthy male recreational runners were recruited to randomly perform two 40 min treadmill running trials,one with CG,and the other with control garment made of normal *** RPE and the surface electromyography(EMG)of 5 lower extremity muscles including gluteus maximus(GM),rectus femoris(RF),semitendinosus(ST),tibialis anterior(TA),and gastrocnemius(GAS)were measured during the running *** blood-lactate levels before and after the running trial were ***:Wearing CG led to significant lower muscle activation(pmuscles;moreover,significant higher median frequency(p0.05).Conclusion:Wearing CG was associated with significantly lower muscle activation and higher median frequency in the running-related key muscles during distance *** finding suggested that wearing CG may improve muscle function,which might enhance running performance and prevent muscle fatigue.

关键词： Blood lactate Compression garment Fatigue muscle activation Rate of perceived exertion Running

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Application of the neuromuscular fatigue threshold treadmill test to muscles of the quadriceps and hamstrings

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Journal of Sport and Health Science 2020年第6期9卷 628-633页

作者： Clayton L.Camic Attila J.Kovacs Trisha A.VanDusseldorp Ethan C.Hill Evan A.Enquist Human Performance Laboratory Exercise and Sport ScienceUniversity of Wisconsin-La CrosseLa CrosseWisconsin 54601USA Department of Exercise Science and Sport Management Kennesaw State UniversityKennesawGeorgia 30144USA Department of Nutrition and Health Sciences University of Nebraska-LincolnLincolnNebraska 68583USA Department of Kinesiology University of AlabamaTuscaloosaAlabama 35487USA

Purpose:The purposes of the present study were:(1)to determine whether the physical working capacity at the fatigue threshold(PWCFT)model that has been used for estimating the onset of neuromuscular fatigue in the vastus lateralis(VL)during incremental treadmill running could also be applied to the vastus medialis(VM),biceps femoris(BF),and semitendinosus(ST)muscles;and(2)if applicable,to compare the running velocities associated with the PWCFT among these ***:Eleven subjects(age 21.7±1.8 years)performed an incremental treadmill test to exhaustion with electromyographic signals recorded from the VL,VM,BF,and ***:The results indicated there were no significant(p>0.05)mean differences in the running velocities associated with the PWCFT for the VL(14.4±2.0 km/h),VM(14.3±1.9 km/h),BF(13.8±1.8 km/h),and ST(14.7±2.3 km/h).In addition,there were significant inter-correlations(r=0.68-0.88)among running velocities associated with the PWCFT of each *** results also indicated that 9 of the 11 subjects exhibited identical PWCFT values for at least 3 of the 4 muscles,but there were no uniform patterns for any intra-individual ***:The findings of the present study suggested that the PWCFT test is a viable method to identify neuromuscular fatigue in the quadriceps and hamstrings during incremental treadmill exercise and results in consistent PWCFT values among these muscles.

关键词： EMG amplitude muscle activation PWCFT

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