Document Detail


Acute creatine loading increases fat-free mass, but does not affect blood pressure, plasma creatinine, or CK activity in men and women.
MedLine Citation:
PMID:  10694109     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Creatine monohydrate (CrM) administration may enhance high intensity exercise performance and increase body mass, yet few studies have examined for potential adverse effects, and no studies have directly considered potential gender differences. PURPOSE: The purpose of this study was to examine the effect of acute creatine supplementation upon total and lean mass and to determine potential side effects in both men and women. METHODS: The effect of acute CrM (20 g x d(-1) x 5 d) administration upon systolic, diastolic, and mean BP, plasma creatinine, plasma CK activity, and body composition was examined in 15 men and 15 women in a randomized, double-blind experiment. Additionally, ischemic isometric handgrip strength was measured before and after CrM or placebo (PL). RESULTS: CrM did not affect blood pressure, plasma creatinine, estimated creatinine clearance, plasma CK activity, or handgrip strength (P > 0.05). In contrast, CrM significantly increased fat-free mass (FFM) and total body mass (P < 0.05) as compared with PL, with no changes in body fat. The observed mass changes were greater for men versus women. CONCLUSIONS: These findings suggest that acute CrM administration does not affect blood pressure, renal function, or plasma CK activity, but increases FFM. The effect of CrM upon FFM may be greater in men as compared with that in women.
Authors:
S Mihic; J R MacDonald; S McKenzie; M A Tarnopolsky
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  32     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2000 Feb 
Date Detail:
Created Date:  2000-03-15     Completed Date:  2000-03-15     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  291-6     Citation Subset:  IM; S    
Affiliation:
Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada.
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MeSH Terms
Descriptor/Qualifier:
Adult
Blood Pressure / drug effects*
Body Composition*
Creatine / administration & dosage,  adverse effects,  pharmacology*
Creatinine / blood*
Dietary Supplements*
Double-Blind Method
Exercise / physiology
Female
Hand Strength
Humans
Male
Sex Factors
Chemical
Reg. No./Substance:
57-00-1/Creatine; 60-27-5/Creatinine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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