Localized muscle pain causes prolonged recovery after fatiguing isometric contractions

被引:16
作者
Ciubotariu, Andrei [1 ]
Arendt-Nielsen, Lars [1 ]
Graven-Nielsen, Thomas [1 ]
机构
[1] Aalborg Univ, Ctr Sensory Motor Interact, Lab Expt Pain Res, DK-9220 Aalborg, Denmark
关键词
experimental muscle pain; surface electromyography; isometric contractions; fatigue recovery;
D O I
10.1007/s00221-007-0913-4
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The purpose of this study was to investigate the force and electromyographic (EMG) signal recorded from the muscles immediately after a sustained fatiguing contraction with or without muscle pain. Ten subjects performed sustained dorsi- and plantarflexions at two contraction levels (50 and 80% of maximum voluntary contraction) until exhaustion with or without muscle pain induced by injection of 6% hypertonic saline in one of the torque producing muscles. The muscle pain intensity was scored on a visual analogue scale (VAS, 0-10 cm). The root mean square (RMS) of the surface EMG signal from plantarflexors and dorsiflexors were estimated during maximum voluntary contractions (MVC) and ramp contractions before and after the fatiguing task at 0, 5, 10 and 15 min during the recovery phase. VAS scores immediately after the contractions with hypertonic saline (on average 3.2 +/- 1.1 cm) progressively decreased during recovery and no pain was experienced 15 min after the contraction. After the painful contraction the RMS-EMG during MVC was on average decreased (23.4 +/- 7.4%) compared to the non-painful condition both in muscles where pain was previously induced and in non-painful synergists. During recovery, the slope of the torque-EMG curve during ramp contraction was significantly decreased (28.4 +/- 8.1%) after the painful contraction compared to the control contraction both for the muscle previously exposed to pain and also the other active synergists. The decreased EMG during recovery after painful contractions compared with control was not accompanied by significant reductions in force during MVC indicating a change in the strategy for motor unit recruitment. This study shows that localized muscle pain inhibits muscle activation and increases the effects of fatigue on EMG recovery curves both for painful and non-painful synergists probably by a central effect. These effects can modify the normal patterns of synergistic activation and can also generate overload problems in muscle pain patients if compensatory motor control strategies are applied.
引用
收藏
页码:147 / 158
页数:12
相关论文
共 40 条
[1]   Incomplete recovery of voluntary isometric force after fatigue is not affected by old age [J].
Allman, BL ;
Rice, CL .
MUSCLE & NERVE, 2001, 24 (09) :1156-1167
[2]   SLOW FORCE RECOVERY AFTER LONG-DURATION EXERCISE - METABOLIC AND ACTIVATION FACTORS IN MUSCLE FATIGUE [J].
BAKER, AJ ;
KOSTOV, KG ;
MILLER, RG ;
WEINER, MW .
JOURNAL OF APPLIED PHYSIOLOGY, 1993, 74 (05) :2294-2300
[3]   CHANGES IN MUSCLE CONTRACTILE PROPERTIES AND NEURAL CONTROL DURING HUMAN MUSCULAR FATIGUE [J].
BIGLANDRITCHIE, B ;
WOODS, JJ .
MUSCLE & NERVE, 1984, 7 (09) :691-699
[4]   REFLEX ORIGIN FOR THE SLOWING OF MOTONEURON FIRING RATES IN FATIGUE OF HUMAN VOLUNTARY CONTRACTIONS [J].
BIGLANDRITCHIE, BR ;
DAWSON, NJ ;
JOHANSSON, RS ;
LIPPOLD, OCJ .
JOURNAL OF PHYSIOLOGY-LONDON, 1986, 379 :451-459
[5]   The influence of muscle pain and fatigue on the activity of synergistic muscles of the leg [J].
Ciubotariu, A ;
Arendt-Nielsen, L ;
Graven-Nielsen, T .
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY, 2004, 91 (5-6) :604-614
[6]   Naturally occurring muscle pain during exercise: Assessment and experimental evidence [J].
Cook, DB ;
OConnor, PJ ;
Eubanks, SA ;
Smith, JC ;
Lee, M .
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE, 1997, 29 (08) :999-1012
[7]  
Della Torre G, 2002, ARCH ITAL BIOL, V140, P51
[8]   MUSCLE-FIBER TYPE POPULATIONS OF HUMAN LEG MUSCLES [J].
EDGERTON, VR ;
SMITH, JL ;
SIMPSON, DR .
HISTOCHEMICAL JOURNAL, 1975, 7 (03) :259-266
[9]   Electromyogram and mechanomyogram changes in fresh and fatigued muscle during sustained contraction in men [J].
Esposito, F ;
Orizio, C ;
Veicsteinas, A .
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY, 1998, 78 (06) :494-501
[10]   Effect of experimental muscle pain on motor unit firing rate and conduction velocity [J].
Farina, D ;
Arendt-Nielsen, L ;
Merletti, R ;
Graven-Nielsen, T .
JOURNAL OF NEUROPHYSIOLOGY, 2004, 91 (03) :1250-1259