Document Type : Research Paper I Open Access I Released under CC BY-NC 4.0 license


1 . Assistant Professor of Exercise Physiology, Department of Physical Education, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran

2 . Professor of Exercise Physiology, Department of Exercise Physiology, Tehran Central Branch, Islamic Azad University, Tehran, Iran

3 Assistant Professor of Biochemistry, Kurdistan University of Medical Sciences, Sanandaj, Iran


Resistance exercises increase oxidative stress and muscle damage. The aim of the present study was to investigate the effect of vitamin D on MDA and CK changes during 8 weeks of progressive resistance training. 40 male subjects (age range 20-25 years) participated in the study voluntarily and were randomly assigned to 4 groups: vitamin D-resistance training (RTD; n=10), placebo-resistance training (RTP; n=10), vitamin D (VD; n=10) and control (con; n=10). Progressive resistance training was performed 3 sessions a week, every other day for 8 weeks with eight movements and increased intensity. Subjects in RTD and VD groups consumed a 50000-IU capsule of vitamin D every two weeks. Blood samples were gathered before and after the training period. Plasma was used to assess CK activity and MDA concentration. Results showed no significant difference among the groups in CK (P˃0.05). However, it was observed that MDA changes in group x time interaction was significant (P=0.001), that is to say MDA concentration significantly decreased in RTD group compared with VD (P=0.017) and control (P=0.034) groups. Also, MDA concentration was significantly lower in RTP than VD in the posttest (P=0.045). However, there was no significant difference between RTD and RTP. Finally, it can be said that the combination of resistance training and vitamin D can decrease lipid peroxidation. However, it seems that resistance training role is very important in this regard.


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