Effects of Six Weeks of β-Hydroxy-β-Methylbutyrate (HMB) and HMB/Creatine

[3XL]

doi: 10.1519/R-15974.1
The Journal of Strength and Conditioning Research: Vol. 21, No. 2, pp. 419–423.

Effects of Six Weeks of β-Hydroxy-β-Methylbutyrate (HMB) and HMB/Creatine Supplementation on Strength, Power, and Anthropometry of Highly Trained Athletes
Donna M. O'Connor


Faculty of Education, The University of Sydney, Sydney, Australia

Melissa J. Crowe


Institute of Sport and Exercise Science, James Cook University, Townsville, Australia

ABSTRACT

O'Connor, D.M., and M.J. Crowe. Effects of six weeks of β-hydroxy-β-methylbutyrate (HMB) and HMB/creatine supplementation on strength, power, and anthropometry of highly trained athletes. J. Strength Cond. Res. 21(2)419–423. 2007.—

This study investigated the effects of 6 weeks of dietary supplementation of β-hydroxy-β-methylbutyrate (HMB) and HMB combined with creatine monohydrate (HMBCr) on the muscular strength and endurance, leg power, and anthropometry of elite male rugby league players.

The subjects were divided into a control group (n = 8), a HMB group (n = 11; 3 g·d−1) or a HMBCr group (n = 11; 12 g·d−1 with 3 g HMB, 3 g Cr, 6 g carbohydrates). Three repetition maximum lifts on bench press, deadlifts, prone row, and shoulder press, maximum chin-up repetitions, 10-second maximal cycle test, body mass, girths, and sum of skinfolds were assessed pre- and postsupplementation.

Statistical analysis revealed no effect of HMB or HMBCr on any parameter compared with presupplementation measures or the control group. HMB and HMBCr were concluded to have no ergogenic effect on muscular strength and endurance, leg power, or anthropometry when taken orally by highly trained male athletes over 6 weeks

[Sephirothsnake]

Van HMB had ik het verwacht, maar van crea niet

[sport wonder]

idd. Kan het eerlijk gezegd ook niet echt geloven. Teveel mensen goed zien reageren op crea waaronder ikzelf. Uiteraard kan je dan kijken naar placebo werkingen maar dat hadden we dan met veel meer producten moeten hebben.

[liquid_ice]

er zijn toch genoeg onderzoeken geweest die aanwezen dat crea wel werkt...

Wat maakt dit onderzoek zo bijzonder dat deze zwaarder weegt dan die andere.

[luke1984]

Wat maakt mij het nou uit of crea een aantoonbaar effect geeft of een placebo. Ik word er een stuk sterker van en ik train er lekkerder mee. Good enough for me...

[3XL]

Ik denk dat dit ermee te maklen heeft

highly trained male athletes

iets anders dan de standaard 3-4 keer in de week amateur

[Bosna Animal]

ze moesten het onderzoek met amateurs doen.

[wazzup]

Origineel gepost door 3XL

Ik denk dat dit ermee te maklen heeft

highly trained male athletes

iets anders dan de standaard 3-4 keer in de week amateur

Thirty males from an Australian National Rugby League team volunteered to participate in this study

yep... definitief geen weekend-warriors.

The training program consisted
of 8 sessions over a 5-day period, followed by 2 consecutive
rest days. Three total-body strength training sessions
and 1 speed/power session (45 minutes of speed drills,
plyometrics, resisted, and assisted training) were performed
each week. This was supplemented by 4 team conditioning
and skill sessions per week of approximately 90
minutes each, including a combination of agility drills,
aerobic, and anaerobic activities, plus skills training. All
training sessions were fully supervised and loads were
individually determined for each subject for every weight
session. Weight sessions were periodized for strength (2–
6 repetitions) and consisted of 25–30 sets per session at
an intensity of 80–95% 1RM. All the exercises used in the
3RM testing were incorporated in the training program.
The subjects had been participating in this resistance
program emphasizing hypertrophy for 8 weeks prior to
the testing period.

[wazzup]

En dan dit nog:

The current study also showed no beneficial effect of
HMBCr on muscular strength and endurance, leg power,
or anthropometry. There is strong research evidence that
Cr supplementation can enhance strength and body composition
(3, 16, 29). Most of these studies, however, utilized
a Cr dose of 15–20 g·d1. The ergogenic effects of Cr
have been shown to be less when supplemented at doses
of 2–3 g·d1 without an initial loading period (8). However,
the ingestion of 3 g·d1 of Cr for 28 days has been
reported to be as effective in raising muscle Cr levels as
a 20 g·d1 loading dose for 6 days, followed by 2 g·d1 for
30 days (9). However, performance measures were not assessed
in this study (9). Thus, it is likely that the subjects
in the current study experienced significantly elevated
muscle Cr stores only for the last 2 weeks of the 6-week
supplementation period, which would be insufficient time
for Cr to affect measures of muscular strength and endurance.
Consistent with this conclusion, past studies
combining HMB and Cr supplementation that reported
positive effects of supplementation on strength and body
composition have utilized higher doses of Cr (15.75–20
g·d1) (1, 10, 14). The current study utilized a 3 g·d1 dose
of Cr, because this was a commercially available HMB
mix. It is likely that this low dose of Cr, rather than the
fact that Cr was supplemented with HMB, may be the
more likely reason for the lack of ergogenic effect of Cr in
the current study. However, an interaction between the
2 supplements cannot yet be ruled out. Therefore, people
considering standard commercial blends of HMB and Cr
may need to consume additional Cr during an initial loading
period of supplementation if the Cr dose is low or they
may need to supplement for longer periods of time.

[Suicide Sid]

Origineel gepost door luke1984

Wat maakt mij het nou uit of crea een aantoonbaar effect geeft of een placebo. Ik word er een stuk sterker van en ik train er lekkerder mee. Good enough for me...

Wat maakt het uit?
Voor een placebo effect is het pokkeduur, misschien? Misschien kan je vanaf nu best je eigen afscheidingen opeten, is veel goedkoper en als je jezelf wijsmaakt dat het vol nutrienten en hormonen zit geeft het je misschien ook wel een placebo effect.

Heb zelf nooit in crea geloofd.

[MeDieViL]

Highly Trained Athletes

heb zo'n idee dat het meer een effect heeft op beginnende sporters, kan iemand mss die andere studies eens posten?

[Juhhis]

buiten het effect dat ik van creatine soms enorme buikkrampen krijg die niet voor normaal aanhoudbaar zijn, ben ik nu nog altijd met mijn zelfde pot creatine bezig als augustus vorig jaar en met heel veel resultaat ( en ook hard trainen met goede voeding en rust ). Dus creatine werkt volgens mij wel wat hoor maar niet meer als je denkt