Effect of creatine phosphate supplementation on anaerobic working capacity and body weight after two and six days of loading in men and women

Joan Eckerson, Jeffrey R. Stout, Geri A. Moore, Nancy J. Stone, Kate A. Iwan, Amy N. Gebauer, Rachelle Ginsberg

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The purpose of this study was to determine the effects of 2 and 6 days of creatine phosphate loading on anaerobic working capacity (AWC) and body weight (BW) in men and women. Sixty-one men (n = 31) and women (n = 30) randomly received 1 of 3 treatments (4 x 5 g·d-1 x 6 days) using a double blind design: (a) 18 g dextrose as placebo (PL); (b) 5.0 g Cr + 20 g dextrose (Cr); or (c) 5.0 g Cr + 18 g dextrose + 4 g of sodium and potassium phosphates (CrP). AWC was determined at baseline and following 2 and 6 days of supplementation using the Critical Power Test. BW increased significantly over time, and the mean value for the men was significantly greater compared to that for women, but there were no interactions (p > 0.05). There were gender-specific responses for AWC expressed in both absolute values (kJ) and relative to BW (kJ·kg-1), with the women demonstrating no significant interactions. For the men, CrP loading significantly increased AWC following 2 days (23.8%) and 6 days (49.8%) of supplementation vs. PL (kJ and kJ·kg-1). Cr supplementation increased AWC 13-15% in both genders compared to PL (1.1%-3.0% decline); although this result was not statistically significant, it may have some practical significance.

Original languageEnglish
Pages (from-to)756-763
Number of pages8
JournalJournal of Strength and Conditioning Research
Volume19
Issue number4
DOIs
StatePublished - Nov 2005

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Phosphocreatine
Body Weight
Placebos
Glucose
Therapeutics

All Science Journal Classification (ASJC) codes

  • Public Health, Environmental and Occupational Health
  • Physical Therapy, Sports Therapy and Rehabilitation
  • Orthopedics and Sports Medicine

Cite this

Effect of creatine phosphate supplementation on anaerobic working capacity and body weight after two and six days of loading in men and women. / Eckerson, Joan; Stout, Jeffrey R.; Moore, Geri A.; Stone, Nancy J.; Iwan, Kate A.; Gebauer, Amy N.; Ginsberg, Rachelle.

In: Journal of Strength and Conditioning Research, Vol. 19, No. 4, 11.2005, p. 756-763.

Research output: Contribution to journalArticle

Eckerson, Joan ; Stout, Jeffrey R. ; Moore, Geri A. ; Stone, Nancy J. ; Iwan, Kate A. ; Gebauer, Amy N. ; Ginsberg, Rachelle. / Effect of creatine phosphate supplementation on anaerobic working capacity and body weight after two and six days of loading in men and women. In: Journal of Strength and Conditioning Research. 2005 ; Vol. 19, No. 4. pp. 756-763.
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