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


1 Ph.D. Student of Exercise Physiology, Faculty of Physical Education, Shahid Beheshti University, Tehran, Iran

2 Associate Professor of Exercise Physiology, Department of Sport Physiology, Faculty of Physical Education, Shahid Beheshti University, Tehran, Iran

3 Associate Professor of Exercise Physiology, Department of Sport Physiology, Faculty of Physical Education, University of Trarbiat Modares, Tehran, Iran

4 Associate Professor of Endocrinology and Metabolism Research Institute, Shahid Beheshti University of Medical Sciences, Tehran

5 Associate Professor of Exercise Physiology, Department of Sport Physiology, Faculty of Physical Education, University of Tehran, Tehran, Iran


Considering the impact of HMB supplement on sport performance, the tendency to consume it in order to achieve more efficiency has increased. Accordingly, the present study investigates the impact of a 6-day consumption of HMB-FA supplement on factors that influence hypertrophy and recovery in inactive men. 20 inactive men with a body mass index of 21.5±1 kg/m2 and age of 25.1±4 years were classified into the following two groups: sport with placebo and sport with supplement. The subjects started to consume HMB-FA supplement 6 days before resistance exercises. The muscle biopsy samples were taken from the subjects immediately before and 10 minutes after resistance exercise. Similarly, blood samples were taken immediately before and after as well as 48 after the exercise. The Results of independent t-test indicated that there is a significant increase (p =0.001) between serum levels of testosterone before and immediately after exercise in sport with placebo group in comparison with sport with supplement group. In addition, there is a significant increase (p =0.001) in P70S6K values and a significant decrease (p =0.001) in serum levels of creatine kinase (CK) and lactate dehydrogenase (LDH) between sport with supplement group and sport with placebo. Therefore, acute consumption of HMB supplement before resistance exercise can increase P70S6K values as the index of hypertrophy. By the same token, it decreases CK and LDH as the indices of muscle damage


Main Subjects

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