Home > Riviste > The Journal of Sports Medicine and Physical Fitness > Fascicoli precedenti > Articles online first > The Journal of Sports Medicine and Physical Fitness 2017 Sep 22

ULTIMO FASCICOLO
 

ARTICLE TOOLS

Publication history
Estratti
Per citare questo articolo

THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS

Rivista di Medicina, Traumatologia e Psicologia dello Sport


Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,215


eTOC

 

The Journal of Sports Medicine and Physical Fitness 2017 Sep 22

DOI: 10.23736/S0022-4707.17.07638-1

Copyright © 2017 EDIZIONI MINERVA MEDICA

lingua: Inglese

Effect of BCAA supplement timing on exercise-induced muscle soreness and damage: a pilot placebo-controlled double-blind study

Song-Gyu RA 1, Teruo MIYAZAKI 2, Ryo KOJIMA 3, Shoichi KOMINE 4, Keisuke ISHIKURA 5, Kentaro KAWANAKA 1, Akira HONDA 2, 6, Yasushi MATSUZAKI 6, Hajime OHMORI 7

1 Faculty of Sports and Health Sciences, Fukuoka University, Fukuoka, Japan; 2 Joint Research Center, Tokyo Medical University, Ibaraki Medical Center, Ibaraki, Japan; 3 School of Health and Physical Education, University of Tsukuba, Tsukuba, Japan; 4 Graduate School of Comprehensive Human Sciences, Majors of Medical Sciences, University of Tsukuba, Tsukuba, Japan; 5 Center for Education and Innovation, Sojo University, Sojo, Japan; 6 Department of Internal Medicine, Division of Gastroenterology and Hepatology, Tokyo Medical University Ibaraki Medical Center, Ibaraki, Japan; 7 Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba, Japan


PDF  


BACKGROUND: The aim of present study was to compare the effects of branched-chain amino acid (BCAA) supplementation taken before or after exercise on delayed onset muscle soreness (DOMS) and exercise-induced muscle damage (EIMD).
METHODS: Fifteen young men (aged 21.5 ± 0.4 years) were given either BCAA (9.6 g·day−1) or placebo before and after exercise (and for 3 days prior to and following the exercise day) in three independent groups: the Control group (placebo before and after exercise), the PRE group (BCAA before exercise and placebo after exercise), and the POST group (placebo before exercise and BCAA after exercise). Participants performed 30 repetitions of eccentric exercise with the non-dominant arm. DOMS, upper arm circumference (CIR), elbow range of motion (ROM), serum creatine kinase (CK), lactate dehydrogenase (LDH), and aldolase, BCAA, and Beta-hydroxy-Beta-methylbutyrate (3HMB) were measured immediately before and after the exercise and on the following 4 days.
RESULTS: Serum BCAA and 3HMB concentrations increased significantly in the PRE group immediately after the exercise, recovering to baseline over the following days. In the days following the exercise day, DOMS, CIR, and ROM were significantly improved in the PRE group compared to the Control group, with weaker effects in the POST group. Serum activities of CK, LDH, and aldolase in the days following the exercise day were significantly suppressed in the PRE group compared to Control group.
CONCLUSIONS: Present study confirmed that repeated BCAA supplementation before exercise had a more beneficial effect in attenuating DOMS and EIMD induced by eccentric exercise than repeated supplementation after exercise.


KEY WORDS: Amino acids - DOMS - Eccentric exercise - EIMD

inizio pagina

Publication History

Article first published online: September 22, 2017
Manuscript accepted: September 13, 2017
Manuscript revised: August 30, 2017
Manuscript received: April 3, 2017

Per citare questo articolo

Ra SG, Miyazaki T, Kojima R, Komine S, Ishikura K, Kawanaka K, et al. Effect of BCAA supplement timing on exercise-induced muscle soreness and damage: a pilot placebo-controlled double-blind study. J Sports Med Phys Fitness 2017 Sep 22. DOI: 10.23736/S0022-4707.17.07638-1

Corresponding author e-mail

omori.hajime.gb@u.tsukuba.ac.jp