Force maintenance with submaximal fatiguing contractions

被引:73
作者
Behm, DG [1 ]
机构
[1] Mem Univ Newfoundland, Sch Human Kinet & Recreat, St John, NF A1C 5S7, Canada
来源
CANADIAN JOURNAL OF APPLIED PHYSIOLOGY-REVUE CANADIENNE DE PHYSIOLOGIE APPLIQUEE | 2004年 / 29卷 / 03期
关键词
postactivation potentiation; recruitment; rate coding; inhibition; catch-like properties;
D O I
10.1139/h04-019
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
Whereas many definitions of fatigue include externally measurable decrements in force or performance, fatigue can be present with no change in the external output of the muscle. The maintenance of submaximal forces can be considered a compromise between neuromuscular force enhancement and competing inhibitory influences. An example of a muscle facilitatory process includes postactivation potentiation that results in an increased sensitivity to Ca++. The neuromuscular system copes with metabolic disruption and subsequent loss of force by recruiting additional motor units and increasing the firing frequency. If the contraction persists, firing frequency may decrease so as to optimize the stimulus rate with the prolonged duration of the muscle fibre action potential (muscle wisdom). The insertion of additional neural impulses into the train of stimuli can result inforce potentiation (catch-like properties). Furthermore, there is evidence of neural potentiation and a dissociation of muscle activity with submaximal fatigue. Conversely, inhibition may be derived supraspinally or at the spinal level. While there may be some evidence of intrinsic motoneuronal fatigue, inhibitory afferent influences from chemical, tensile, pressure, and other factors play an important role in the competing influences on force output.
引用
收藏
页码:274 / 290
页数:17
相关论文
共 100 条
  • [1] Vastus lateralis fatigue alters recruitment of musculus quadriceps femoris in humans
    Akima, H
    Foley, JM
    Prior, BM
    Dudley, GA
    Meyer, RA
    [J]. JOURNAL OF APPLIED PHYSIOLOGY, 2002, 92 (02) : 679 - 684
  • [2] CONTRACTILE ADAPTATIONS IN THE HUMAN TRICEPS SURAE AFTER ISOMETRIC-EXERCISE
    ALWAY, SE
    MACDOUGALL, JD
    SALE, DG
    [J]. JOURNAL OF APPLIED PHYSIOLOGY, 1989, 66 (06) : 2725 - 2732
  • [3] TWITCH POTENTIATION AFTER FATIGUING EXERCISE IN MAN
    ALWAY, SE
    HUGHSON, RL
    GREEN, HJ
    PATLA, AE
    FRANK, JS
    [J]. EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY AND OCCUPATIONAL PHYSIOLOGY, 1987, 56 (04): : 461 - 466
  • [4] ASMUSSEN E, 1979, MED SCI SPORT EXER, V11, P313
  • [5] CENTRAL NERVOUS COMPONENT IN LOCAL MUSCULAR FATIGUE
    ASMUSSEN, E
    MAZIN, B
    [J]. EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY AND OCCUPATIONAL PHYSIOLOGY, 1978, 38 (01): : 9 - 15
  • [6] CHANGES IN RECIPROCAL AND TRANSJOINT INHIBITION INDUCED BY MUSCLE FATIGUE IN MAN
    AYMARD, C
    KATZ, R
    LAFITTE, C
    LEBOZEC, S
    PENICAUD, A
    [J]. EXPERIMENTAL BRAIN RESEARCH, 1995, 106 (03) : 418 - 424
  • [7] Postexercise facilitation of motor evoked potentials following transcranial magnetic stimulation: A study in normal subjects
    Balbi, P
    Perretti, A
    Sannino, M
    Marcantonio, L
    Santoro, L
    [J]. MUSCLE & NERVE, 2002, 25 (03) : 448 - 452
  • [8] BALESTRA C, 1991, ELECTROEN CLIN NEURO, V68, P906
  • [9] Physiological alterations of maximal voluntary quadriceps activation by changes of knee joint angle
    Becker, R
    Awiszus, F
    [J]. MUSCLE & NERVE, 2001, 24 (05) : 667 - 672
  • [10] Effects of fatigue duration and muscle type on voluntary and evoked contractile properties
    Behm, DG
    StPierre, DMM
    [J]. JOURNAL OF APPLIED PHYSIOLOGY, 1997, 82 (05) : 1654 - 1661