Responses of elbow flexors to two strenuous eccentric exercise bouts separated by three days

Journal of Strength and Conditioning Research
Trevor C Chen, Kazunori Nosaka

Abstract

This study investigated whether the second eccentric exercise performed 3 days after the initial bout would exacerbate muscle damage and retard the recovery. Fifty-one athletes performed 30 eccentric actions of the elbow flexors using a dumbbell weighted 100% of the maximal isometric force (MIF) at the elbow joint angle of 90 degrees (ECC1). Three days after ECC1, all subjects except those in the control group (n = 12) performed the second bout (ECC2) with the same (100%) intensity (n = 12), 90% (n = 13), or 80% (n = 14) of the ECC1. Some subjects, especially in the 100% group, required spotting for ECC2 but made maximal effort to complete the exercise. MIF, range of motion, upper-arm circumference, muscle soreness, muscle proteins in the blood, and ultrasound images were used to assess muscle damage. Changes in these measures for 9 days following ECC1 were compared among groups by 2-way analysis of variance (ANOVA) with repeated measures. All criterion measures changed significantly after ECC1; however, no significant differences between the groups were evident for any of the changes in the measures. These results suggest that it is possible for athletes to complete the second bout if the intensity is reduced 10-20% from the i...Continue Reading

Citations

Dec 17, 2009·European Journal of Applied Physiology·Sigitas KamandulisJacques Duchateau
May 12, 2012·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Hsin-Lian ChenTrevor C Chen
Jul 2, 2009·Journal of Strength and Conditioning Research·Diamond NguyenBrandon P Uribe
Nov 17, 2009·Journal of Strength and Conditioning Research·Akihiro SakamotoPeter James Sinclair
Mar 20, 2010·Journal of Strength and Conditioning Research·Albertas SkurvydasNerijus Masiulis
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Feb 17, 2009·Physical Therapy in Sport : Official Journal of the Association of Chartered Physiotherapists in Sports Medicine·Dominic Micklewright
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Mar 19, 2020·Clinical Physiology and Functional Imaging·Noam YitzchakiSamuel L Buckner

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