A light load eccentric exercise confers protection against a subsequent bout of more demanding eccentric exercise

J Sci Med Sport. 2008 Jun;11(3):291-8. doi: 10.1016/j.jsams.2007.03.005. Epub 2007 Aug 17.


This study investigated the hypothesis that a light eccentric exercise (ECC) that does not induce a loss of muscle function and delayed onset muscle soreness would confer a protective effect against a more strenuous ECC. Eighteen young men were randomly placed into two groups: 10-40% (n=9) and 40% (n=9). Subjects in the 10-40% group performed ECC of the elbow flexors (six sets of five reps) using a dumbbell set at 10% of maximal isometric strength (MVC) at an elbow joint angle of 90 degrees , followed 2 days later by ECC using a dumbbell weight of 40% MVC. Subjects in the 40% group performed the 40% ECC only. Changes in MVC, range of motion (ROM), upper arm circumference (CIR), plasma creatine kinase (CK) activity and muscle soreness before, immediately after, 1-5 and 7 days following the 40% ECC were compared between groups by a two-way repeated measures ANOVA. No significant changes in any of the criterion measures were found immediately and 1-2 days after the 10% ECC. Following the 40% ECC, the 10-40% group showed significantly (P<0.05) smaller decreases in MVC and ROM, and smaller increases in muscle soreness compared with the 40% group, but no significant differences between groups were evident for CIR and plasma CK activity. These results suggest that the 10% ECC induced some protection against a subsequent bout of 40% ECC performed 2 days later. It appears that the light eccentric exercise preconditioned the muscles for exposure to the subsequent damaging eccentric exercise bout.

MeSH terms

  • Adolescent
  • Adult
  • Athletic Injuries / physiopathology
  • Athletic Injuries / prevention & control*
  • Exercise / physiology
  • Humans
  • Male
  • Muscle, Skeletal / injuries*
  • Muscle, Skeletal / physiopathology
  • Physical Education and Training / methods*
  • Physical Endurance / physiology*
  • Upper Extremity / injuries
  • Upper Extremity / physiology
  • Weight Lifting / physiology*