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2013 | 38 | 83-94
Tytuł artykułu

Potentiation Increases Peak Twitch Torque by Enhancing Rates of Torque Development and Relaxation

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The aim of this study was to measure the extent to which potentiation changes in response to an isometric maximal voluntary contraction. Eleven physically active subjects participated in two separate studies. Single stimulus of electrical stimulation of the femoral nerve was used to measure torque at rest in unpotentiated quadriceps muscles (study 1 and 2), and potentiated quadriceps muscles torque in a 10 min period after a 5 s isometric maximal voluntary contraction of the quadriceps muscles (study 1). Additionally, potentiated quadriceps muscles torque was measured every min after a further 10 maximal voluntary contractions repeated every min (study 2). Electrical stimulation repeated several times without previous maximal voluntary contraction showed similar peak twitch torque. Peak twitch torque 4 s after a 5 s maximal voluntary contraction increased by 45±13% (study 1) and by 56±10% (study 2), the rate of torque development by 53±13% and 82±29%, and the rate of relaxation by 50±17% and 59±22%, respectively, but potentiation was lost already two min after a 5 s maximal voluntary contraction. There was a tendency for peak twitch torque to increase for the first five repeated maximal voluntary contractions, suggesting increased potentiation with additional maximal voluntary contractions. Correlations for peak twitch torque vs the rate of torque development and for the rate of relaxation were r2= 0.94 and r2=0.97. The correlation between peak twitch torque, the rate of torque development and the rate of relaxation suggests that potentiation is due to instantaneous changes in skeletal muscle contractility and relaxation.
Wydawca

Rocznik
Tom
38
Strony
83-94
Opis fizyczny
Daty
wydano
2013-09-01
online
2013-10-08
Twórcy
  • UCT/MRC Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, South Africa, christian.froyd@hisf.no
  • Faculty of Teacher Education and Sport, Sogn og Fjordane University College, Norway
  • UCT/MRC Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, South Africa
  • Department of Physical Performance, Norwegian School of Sport Sciences, Norway
  • UCT/MRC Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, South Africa
Bibliografia
  • Baudry S, Duchateau J. Postactivation potentiation in human muscle is not related to the type of maximal conditioning contraction. Muscle Nerve, 2004; 30(3): 328-336[PubMed][Crossref]
  • Folland JP, Wakamatsu T, Fimland MS. The influence of maximal isometric activity on twitch and H-reflex potentiation, and quadriceps femoris performance. Eur J Appl Physiol, 2008; 104(4): 739-748[WoS]
  • Froyd C, Millet GY, Noakes TD. The development of peripheral fatigue and short-term recovery during selfpaced high-intensity exercise. J Physiol, 2013; 591(Pt 5): 1339-1346[WoS]
  • Green HJ, Jones SR. Does post-tetanic potentiation compensate for low frequency fatigue? Clin Physiol, 1989; 9(5): 499-514[Crossref][PubMed]
  • Hamada T, Sale DG, MacDougall JD, Tarnopolsky MA. Postactivation potentiation, fiber type, and twitch contraction time in human knee extensor muscles. J Appl Physiol, 2000; 88(6): 2131-2137[PubMed]
  • Krarup C. Enhancement and diminution of mechanical tension evoked by staircase and by tetanus in rat muscle. J Physiol, 1981; 311: 355-372
  • Kufel TJ, Pineda LA, Mador M J. Comparison of potentiated and unpotentiated twitches as an index of muscle fatigue. Muscle Nerve, 2002; 25(3): 438-444[Crossref][PubMed]
  • Miyamoto N, Kanehisa H, Kawakami Y. Potentiation of Maximal Voluntary Concentric Torque in Human Quadriceps Femoris. Med Sci Sports Exerc, 2012; 44(9):1738-46[PubMed][WoS][Crossref]
  • Miyamoto N, Mitsukawa N, Sugisaki N, Fukunaga T, Kawakami Y. Joint angle dependence of intermuscle difference in postactivation potentiation. Muscle Nerve, 2010; 41(4): 519-523[PubMed][WoS][Crossref]
  • Paasuke M, Saapar L, Ereline J, Gapeyeva H, Requena B, Oopik V. Postactivation potentiation of knee extensor muscles in power- and endurance-trained, and untrained women. Eur J Appl Physiol, 2007; 101(5): 577-585[PubMed][WoS][Crossref]
  • Place N, Yamada T, Bruton JD, Westerblad H. Muscle fatigue: from observations in humans to underlying mechanisms studied in intact single muscle fibres. Eur J Appl Physiol, 2010; 110(1): 1-15[PubMed][Crossref]
  • Rassier DE, Macintosh BR. Coexistence of potentiation and fatigue in skeletal muscle. Braz J Med Biol Res, 2000; 33(5): 499-508[Crossref][PubMed]
  • Requena B, Gapeyeva H, Garcia I, Ereline J, Paasuke M. Twitch potentiation after voluntary versus electrically induced isometric contractions in human knee extensor muscles. Eur J Appl Physiol, 2008; 104(3): 463-472[WoS]
  • Romer LM, Haverkamp HC, Amann M, Lovering AT, Pegelow DF, Dempsey JA. Effect of acute severe hypoxia on peripheral fatigue and endurance capacity in healthy humans. Am J Physiol Regul Integr,Comp Physiol, 2007; 292(1): R598-R606[WoS]
  • Sale DG. Postactivation potentiation: role in human performance. Exerc Sport Sci Rev, 2002; 30(3): 138-143[Crossref][PubMed]
  • Sweeney HL, Bowman BF, Stull JT. Myosin light chain phosphorylation in vertebrate striated muscle: regulation and function. Am J Physiol, 1993; 264(5 Pt 1): C1085-C1095
  • Vandenboom R, Grange RW, Houston ME. Threshold for force potentiation associated with skeletal myosin phosphorylation. Am J Physiol, 1993; 265(6 Pt 1): C1456-C1462
  • Vandervoort AA, Quinlan J, McComas AJ. Twitch potentiation after voluntary contraction. Exp Neurol, 1983; 81(1): 141-152[Crossref][PubMed]
  • Westerblad H, Allen DG. Changes of myoplasmic calcium concentration during fatigue in single mouse muscle fibers. J Gen Physiol, 1991; 98(3): 615-635 [Crossref][PubMed]
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_hukin-2013-0048
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