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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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SHORT AND LONGER-TERM EFFECTS OF CREATINE SUPPLEMENTATION ON EXERCISE INDUCED MUSCLE DAMAGE |
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John Rosene1  ,
Tracey Matthews2, Christine Ryan1, Keith Belmore1,
Alisa Bergsten1, Jill Blaisdell1, James Gaylord1,
Rebecca Love1, Michael Marrone1, Kristine Ward1
and Eric Wilson1 |
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1Health and Human Performance Department, Plymouth State University, Plymouth, NH, USA 2Exercise Science and Sports Studies Department, Springfield College, Springfield, MA, USA. |
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© Journal of Sports Science and Medicine (2009) 8, 89 - 96 Search Google Scholar for Citing Articles |
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| ABSTRACT | |||
| The purpose of this investigation was to determine if creatine
supplementation assisted with reducing the amount of exercise induced muscle
damage and if creatine supplementation aided in recovery from exercise induced
muscle damage. Two groups of subjects (group 1 = creatine; group 2 = placebo)
participated in an eccentric exercise protocol following 7 and 30 days of
creatine or placebo supplementation (20 g.d-1 for 7 d followed by 6g.d-1
for 23 d = 30 d). Prior to the supplementation period, measurements were
obtained for maximal dynamic strength, maximal isometric force, knee range
of motion, muscle soreness, and serum levels of creatine kinase (CK) and
lactate dehydrogenase (LDH). Following 7 days of creatine supplementation,
on day 8, subjects began consuming 6 g.d-1 of creatine for 23 days. Additionally
on days 8 and 31, subjects performed an eccentric exercise protocol using
the knee extensors to induce muscle damage. Indirect markers of muscle damage,
including maximal isometric force, knee range of motion, muscle soreness,
and serum levels of CK and LDH, were collected at 12, 24, and 48 hours following
each exercise bout. The results indicated that acute bouts of creatine have
no effect on indirect markers of muscle damage for the acute (7 days) bout.
However, maximal isometric force was greater for the creatine group versus
placebo for the chronic (30 days) bout. This suggests that the ergogenic
effect of creatine following 30 days of supplementation may have a positive
impact on exercise induced muscle damage.
Key words: Soreness, isometric force, eccentric. |
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