Apunts Medicina de l'Esport (English Edition) Apunts Medicina de l'Esport (English Edition)
Apunts Med Esport. 2013;48:49-54 - Vol. 48 Num.178 DOI: 10.1016/j.apunts.2012.09.003

One repetition maximum test increases serum indices of muscle damage and soreness in trained and untrained males

Hamid Arazi a,, Abbas Asadi b

a Department of Exercise Physiology, Faculty of Physical Education & Sport Science, University of Guilan, Rasht, Iran
b Islamic Azad University, Roudbar Branch, Roudbar, Iran

Keywords

1RM. Creatine kinase. C-reactive protein. Back squat. Muscle damage.

Abstract

Introduction

The purpose of this study was to examine the effect of one repetition maximum test on muscle damage and soreness in trained and untrained males.

Methods

Ten trained (T) and 10 untrained (UT) males participated in this study. Subjects performed one repetition maximum (1RM) test for the back squat exercise and creatine kinase (CK) activity, C-reactive protein (CRP) concentration, and muscle soreness (quadriceps and hamstring) were assessed at pre, 24, 48 and 72 h post 1RM test.

Results

Significant increases in CK activity and muscle soreness were observed at 24, 48 and 72 h post 1RM test, and there were also significant differences between T and UT (p < 0.05). In the CRP concentration, both groups indicated significant increases above resting at 24, 48 and 72 h post 1RM test and 72 h compared to 24 h (p < 0.05). There were no significant differences between T and UT in the CRP concentration (p > 0.05).

Conclusion

In conclusion, the 1RM back squat test (high intensity and low volume) increases CK activity, CRP concentration in the plasma and muscle soreness in the T and UT. It can be observed that 1RM test can induce muscle damage, which would be a negative factor for athletes and individuals, since the muscle injury is associated with decreased performance.