Maximal-intensity isometric and dynamic exercise performance after eccentric muscle actions

被引:92
作者
Byrne, C
Eston, R
机构
[1] Def Sci & Technol Agcy, Def Med Res Inst, Mil Physiol Lab, Singapore 248843, Singapore
[2] Univ Wales, Sch Sport Hlth & Exercise Sci, Bangor LL57 2PX, Gwynedd, Wales
关键词
eccentric exercise; fatigue; muscle damage; strength; Wingate test;
D O I
10.1080/026404102321011706
中图分类号
G8 [体育];
学科分类号
04 ; 0403 ;
摘要
A well-documented observation after eccentric exercise is a reduction in maximal voluntary force. However, little is known about the ability to maintain maximal isometric force or generate and maintain dynamic peak power. These aspects of muscle function were studied in seven participants (5 males, 2 females). Knee extensor isometric strength and rate of fatigue were assessed by a sustained 60 s maximal voluntary contraction at 80 and 40 knee flexion, corresponding to an optimal and a shortened muscle length, respectively. Dynamic peak power and rate of fatigue were assessed during a 30 s Wingate cycle test. Plasma creatine kinase was measured from a fingertip blood sample. These variables were measured before, 1 h after and 1, 2, 3 and 7 days after 100 repetitions of the eccentric phase of the barbell squat exercise (10 sets x 10 reps at 80% concentric one-repetition maximum). Eccentric exercise resulted in elevations in creatine kinase activity above baseline (274 +/-109 U . l(-1); mean +/- s((x) over bar)) after 1 h (506 +/- 116 U . l(-1), P < 0.05) and 1 day (808 +/- 117 U center dot l(-1), P < 0.05). Isometric strength was reduced (P< 0.05) for 7 days (35% at 1 h, 5% at day 7) and the rate of fatigue was lower (P< 0.05) for 3 days at 80 and for 1 day at 40degrees. Wingate peak power was reduced to a lesser extent (P< 0.05) than isometric strength at 1 h (13%) and, although the time course of recovery was equal, the two variables differed in their pattern of recovery. Eccentrically exercised muscle was characterized by an inability to. generate high force and power, but an improved ability to maintain force and power. Such functional outcomes are consistent with the proposition that type II fibres are selectively recruited or damaged during eccentric exercise.
引用
收藏
页码:951 / 959
页数:9
相关论文
共 47 条
[1]   Exercise metabolism in human skeletal muscle exposed to prior eccentric exercise [J].
Asp, S ;
Daugaard, JR ;
Kristiansen, S ;
Kiens, B ;
Richter, EA .
JOURNAL OF PHYSIOLOGY-LONDON, 1998, 509 (01) :305-313
[2]   EFFECT OF TRAINING ON ECCENTRIC EXERCISE-INDUCED MUSCLE DAMAGE [J].
BALNAVE, CD ;
THOMPSON, MW .
JOURNAL OF APPLIED PHYSIOLOGY, 1993, 75 (04) :1545-1551
[3]   THE WINGATE ANAEROBIC TEST - AN UPDATE ON METHODOLOGY, RELIABILITY AND VALIDITY [J].
BAROR, O .
SPORTS MEDICINE, 1987, 4 (06) :381-394
[4]  
Behm DG, 2001, J STRENGTH COND RES, V15, P255
[5]   CENTRAL AND PERIPHERAL FATIGUE IN SUSTAINED MAXIMUM VOLUNTARY CONTRACTIONS OF HUMAN QUADRICEPS MUSCLE [J].
BIGLANDRITCHIE, B ;
JONES, DA ;
HOSKING, GP ;
EDWARDS, RHT .
CLINICAL SCIENCE AND MOLECULAR MEDICINE, 1978, 54 (06) :609-614
[6]   A comparison of the effects of concentric versus eccentric exercise on force and position sense at the human elbow joint [J].
Brockett, C ;
Warren, N ;
Gregory, JE ;
Morgan, DL ;
Proske, U .
BRAIN RESEARCH, 1997, 771 (02) :251-258
[7]   The effect of exercise-induced muscle damage on isometric and dynamic knee extensor strength and vertical jump performance [J].
Byrne, C ;
Eston, R .
JOURNAL OF SPORTS SCIENCES, 2002, 20 (05) :417-425
[8]   Characteristics of isometric and dynamic strength loss following eccentric exercise-induced muscle damage [J].
Byrne, C ;
Eston, RG ;
Edwards, RHT .
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS, 2001, 11 (03) :134-140
[9]  
Clarkson PM, 1995, ADV EXP MED BIOL, V384, P457
[10]  
CLARKSON PM, 1992, MED SCI SPORT EXER, V24, P512