THE EFFECT OF SHORT -TERM COMBINATION OF HMB (BETA-HYDROXY-BETA-METHYLBUTYRATE) AND CREATINE SUPPLEMENTATION ON ANAEROBIC PERFORMANCE AND MUSCLE INJURY MARKERS IN SOCCER PLAYERS

Résumé 0

"The purpose of this study was to examine the effects of consumption of HMB (beta- hydroxy-beta-methylbutyrate) and creatine supplementation on anaerobic performance and muscle injury markers of soccer players. Twenty-four soccer players from the Iranian soccer first league, at mean age: 20.72 ± 0.70 years, height: 173.33± 4.50 cm, and weight: 58.60± 5.41kg were selected and randomly divided to three groups: HMB supplementation (n=8), combination of HMB and creatine (HMBCr) (n=8), and placebo (n=8). Anaerobic performance was assessed by running anaerobic speed test (RAST), and muscle injury markers measured by serum CK and LDH in the pre and post tests. Supplementation period was six days. The HMB group received 3gr of HMB supplement per day, the HMBCr group received 3gr of HMB and 3gr of creatine, and the placebo group received 6gr of carbohydrate. To investigate the mean differences between pre and post-test variables was used dependent student t-test. Furthermore, a one ¿way ANOVA was done among the three groups, to compare the mean differences of pre and post tests. As there was any significant difference, used the TUKEYs post hock test. The results showed that peak power increased in both groups of creatine and HMBCr supplementation. However, there was significant increase only in HMBCr group (p=0.02). Furthermore, after comparing the groups, there was a significant difference between HMB and MBCr supplementation group (p=0.036). Mean power increased in, HMB and HMBCr groups. But, this was significant in HMBCr group (p=0.014), only. Although, fatigue index showed the small changes in the three groups, there was no significant difference. Also, the mean of serum LDH and CK was decreased. This however, was no significant in any of the groups. In conclusion, the results of this study showed that due to the relative increase in anaerobic performance of soccer players, HMBCr supplementation can lead to increase of anaerobic performance."