Effect of two maximal isometric contractions on eccentric exercise-induced muscle damage of the elbow flexors

Chung-Ching Chen, Hsin Lian Chen, Ming Ju Lin, Che Hsiu Chen, Alan J. Pearce, Kazunori Nosaka

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

This study investigated the time wise protective effect conferred by two maximal voluntary isometric contractions (2MVCs) at 20 elbow flexion on muscle damage induced by 30 maximal isokinetic (60 s-1) eccentric contractions of the elbow flexors (MaxECC). Sixty-five young untrained men were randomly assigned to a control group that did not perform 2MVCs, or one of four experimental groups (n = 13 per group) who performed 2MVCs either immediately (0d), 2 (2d), 4 (4d) or 7 days (7d) before MaxECC. Changes in maximal isokinetic (60 s-1) concentric torque (MVC-CON), optimum angle (OA), range of motion, upper arm circumference, muscle soreness, plasma creatine kinase activity and myoglobin concentration, and ultrasound echo-intensity following MaxECC were compared among the groups by a two-way repeated measures ANOVA. No significant changes in any variables were evident following 2MVCs. The 2d and 4d groups showed 16-62 % smaller (P < 0.05) changes in all variables following MaxECC than the control, 0d and 7d groups. The 2d group showed 14-34 % smaller (P < 0.05) changes in all variables except for OA compared with the 4d group. The changes in the variables were similar among the control, 0d and 7d groups. These results show that 2MVCs that were performed between 2 and 4 days before MaxECC attenuated the magnitude of muscle damage, but no such effect was evident if the 2MVCs were performed immediately or 7 days before MaxECC. It is concluded that the protective effect conferred by 2MVCs is relatively short-lived, and there is a window for the effect to be conferred.

Original languageEnglish
Pages (from-to)1545-1554
Number of pages10
JournalEuropean Journal of Applied Physiology
Volume113
Issue number6
DOIs
Publication statusPublished - 2013 Jun 1

Fingerprint

Isometric Contraction
Elbow
Exercise
Muscles
Myoglobin
Myalgia
Torque
Creatine Kinase
Articular Range of Motion
Analysis of Variance
Arm
Control Groups

Keywords

  • Creatine kinase
  • Delayed onset muscle soreness
  • Muscle strength
  • Preconditioning
  • Repeated bout effect

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Public Health, Environmental and Occupational Health
  • Physiology (medical)

Cite this

Effect of two maximal isometric contractions on eccentric exercise-induced muscle damage of the elbow flexors. / Chen, Chung-Ching; Chen, Hsin Lian; Lin, Ming Ju; Chen, Che Hsiu; Pearce, Alan J.; Nosaka, Kazunori.

In: European Journal of Applied Physiology, Vol. 113, No. 6, 01.06.2013, p. 1545-1554.

Research output: Contribution to journalArticle

Chen, Chung-Ching ; Chen, Hsin Lian ; Lin, Ming Ju ; Chen, Che Hsiu ; Pearce, Alan J. ; Nosaka, Kazunori. / Effect of two maximal isometric contractions on eccentric exercise-induced muscle damage of the elbow flexors. In: European Journal of Applied Physiology. 2013 ; Vol. 113, No. 6. pp. 1545-1554.
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