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Op donderdag 9 juni 2005 10:39 schreef tongytongylickylicky het volgende:Iemand wel eens HMB gebruikt en daar ook positieve effecten mee behaald?
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HMB (beta-Hydroxy beta-Methylbutyrate), een supplement dat bij dieren goede resultaten gaf maar in de meeste studies bij de mens veel minder belovend was, blijkt opnieuw in praktijk weinig voordeel te bieden.
De algemene feedback van gebruikers was al niet erg positief, en nieuw onderzoek bevestigd alleen deze zwakke resultaten. Hoewel HMB een merkbare invloed heeft op cortisol en creatine kinase concentraties, heeft het supplement op korte termijn geen effect op kracht of spiermassa.
BB en PL'ers doen er dan ook goed aan om hun geld te besteden aan supplementen die goedkoper zijn, en in de praktijk ook doen wat ze beloven (i.e. creatine).
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J Strength Cond Res. 2004 Nov;18(4):747-52. Related Articles, Links
Effects of beta-Hydroxy beta-Methylbutyrate on Power Performance and Indices of Muscle Damage and Stress During High-Intensity Training.
Hoffman JR, Cooper J, Wendell M, Im J, Kang J.
Department of Health and Exercise Science, The College of New Jersey, Ewing, New Jersey 08628.
Hoffman, J.R., J. Cooper, M. Wendell, J. Im, and J. Kang. Effects of beta-hydroxy beta-methylbutyrate on power performance and indices of muscle damage and stress during high intensity training. J. Strength Cond. Res. 18(4):000-000. 2004.- Twenty-six members of a collegiate football team were randomly assigned to either a supplement (S) (3 g of beta-hydroxy beta-methylbutyrate [HMB] per day) or placebo (P) group. Testing occurred before (PRE) and at the end of 10 days of preseason football training camp (POST). During each testing session, subjects performed an anaerobic power test, and blood samples were obtained for testosterone, cortisol, creatine kinase, and myoglobin analysis. No differences in anaerobic power were seen between PRE and POST in either group. Cortisol concentrations were significantly decreased from PRE (333 +/- 81 nmol.L(-1)) to POST (246 +/- 79 nmol.L(-1)), and a sixfold increase was seen in creatine kinase concentrations at POST. However, no significant differences between the groups were seen. No significant time or group effects were observed in testosterone or myoglobin concentrations. Results suggest that short duration HMB supplementation does not provide any ergogenic benefit in collegiate football players during preseason training camp.
http://www.dutchbodybuilding.com/forum/showthread.php?t=27517___________________________________________