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Original articles  BODY COMPOSITION, SPORT NUTRITION AND SUPPLEMENT (ERGOGENICS)


The Journal of Sports Medicine and Physical Fitness 2003 March;43(1):64-8

Copyright © 2009 EDIZIONI MINERVA MEDICA

lingua: Inglese

Effects of β-hydroxy-β-methylbutyrate and creatine monohydrate supplementation on the aerobic and anaerobic capacity of highly trained athletes

O’connor D. M., Crowe M. J.

Institute of Sport and Exercise Science James Cook University, Australia


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Aim. The aim of ­this ­study was to inves­ti­gate the ­effects of 6 wks ­oral sup­ple­men­ta­tion of β-­hydroxy-β-meth­yl­bu­ty­rate (HMB) and a mix­ture of HMB and crea­tine mono­hy­drate (­HMBCr) on aero­bic and anaer­o­bic capac­ity in high­ly ­trained ath­letes. It was hypo­the­sised ­that HMB and ­HMBCr ­would ­have pos­i­tive ­effects on aero­bic and anaer­o­bic pow­er.
Meth­ods. A pros­pec­tive ­study involv­ing a repeat­ed meas­ures ­design was util­ised ­where sub­jects under­went test­ing ­prior to, and imme­di­ate­ly ­after, a 6 wks sup­ple­men­ta­tion peri­od. ­Elite, ­male rug­by ­league ­players (n=27) ­were divid­ed ­into 3 ­groups, a con­trol ­group (n=6), a HMB ­group (3 g/d; n=10) and a ­HMBCr ­group (3 g/d HMB + 3 g/d Cr; n=11). Test­ing ­involved a mul­ti­stage fit­ness ­test to deter­mine aero­bic pow­er and a 60 sec max­i­mal ­cycle ­test to deter­mine anaer­o­bic capac­ity. ­Peak pow­er, ­total ­work and ­peak lac­tate lev­els ­were meas­ured in the anaer­o­bic ­cycle ­test.
­Results. Two-way repeat­ed meas­ures ANO­VA ­revealed no ­effect of HMB or ­HMBCr on any of the meas­ured param­e­ters in com­par­i­son to the con­trol ­group.
Con­clu­sion. Aero­bic and anaer­o­bic abil­ity of high­ly ­trained ­male ath­letes is unaf­fect­ed by 6 wks ­oral sup­ple­men­ta­tion ­with HMB or a com­bi­na­tion of HMB and crea­tine mono­hy­drate

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