Short-term beta-hydroxy-beta-methylbutyrate supplementation does not reduce symptoms of eccentric muscle damage


Autoria(s): Paddon-Jones, D; Keech, A; Jenkins, D
Contribuinte(s)

P.M. Clarckson

Data(s)

01/01/2001

Resumo

Purpose: We examined the effects of short-term beta -hydroxy-beta -methylbutyrate (HIM) supplementation on symptoms of muscle damage following an acute bout of eccentric exercise. Methods: Non-resistance trained subjects were randomly assigned to a HMB supplement group (HMB, 40mg/kg bodyweight/day, n = 8) or placebo group (CON, n = 9). Supplementation commenced 6 days prior to a bout of 24 maximal isokinetic eccentric contractions of the elbow flexors and continued throughout post-testing. Muscle soreness, upper arm girth, and torque measures were assessed pre-exercise, 15 min post-exercise, and 1, 2, 3, 4, 7, and 10 days post-exercise. Results: No pre-test differences between HMB and CON groups were identified, and both performed a similar amount of eccentric work during the main eccentric exercise bout (p > .05). HMB supplementation had no effect on swelling, muscle soreness, or torque following the damaging eccentric exercise bout (p > .05). Conclusion: Compared to a placebo condition, short-term supplementation with 40mg/kg bodyweight/day of HMB had no beneficial effect on a range of symptoms associated with eccentric muscle damage. If HMB can produce an ergogenic response, a longer pre-exercise supplementation period may be necessary.

Identificador

http://espace.library.uq.edu.au/view/UQ:59426

Idioma(s)

eng

Publicador

Human Kinetics

Palavras-Chave #Nutrition & Dietetics #Sport Sciences #Hmb #Recovery #Exercise #Doms #Adaptation #Soreness #Strength #C1 #321205 Nutrition and Dietetics #730215 Nutrition
Tipo

Journal Article