The Effect of Fluid Replacement on Endurance Performance

Laurel Bachle, Joan Eckerson, Lara Albertson, Kyle Ebersole, Jeff Goodwin, David Petzel

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The purpose of this study was to examine the effects of fluid replacement on power output (PO), rating of perceived exertion (RPE), heart rate (HR), body weight (BW), urine osmolarity (Uosm), and urine electrolyte concentrations ([UNa+], [UK+], [UCl-]) in physically active men (n = 4) and women (n = 7). The participants were asked to generate their highest possible PO during 60 minutes of cycling under 3 randomized conditions: ingestion of (a) no fluid (trial 1); (b) 1200 ml of distilled water (trial 2); and (c) 1200 ml of Gatorade (trial 3). BW and urine volume (Vu) were measured before and after the ride to determine sweat rate [(SR = ΔBW + Vfluid intake + Vu)/time]. The results indicated that there were no significant differences between trials for PO (123-127 W), RPE (14), HR (140-142 b·min-1), and SR (11.9-12.4 ml·min-1). However, [UNa+] was significantly (p <0.05) lower postexercise for all 3 trials, and [UCl-] was significantly reduced following trials 2 and 3. There was a significant increase (p <0.001) in BW postexercise for trials 2 and 3 when compared with the no-fluid trial; however, the effects of water and Gatorade were similar. These results suggest that fluid replacement during 1 hour of moderately intense cycling does not enhance performance in physically active men and women who are normally hydrated.

Original languageEnglish
Pages (from-to)217-224
Number of pages8
JournalJournal of Strength and Conditioning Research
Volume15
Issue number2
DOIs
StatePublished - May 2001

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Body Weight
Urine
Heart Rate
Water
Sweat
Osmolar Concentration
Electrolytes
Eating
gatorade

All Science Journal Classification (ASJC) codes

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

Cite this

The Effect of Fluid Replacement on Endurance Performance. / Bachle, Laurel; Eckerson, Joan; Albertson, Lara; Ebersole, Kyle; Goodwin, Jeff; Petzel, David.

In: Journal of Strength and Conditioning Research, Vol. 15, No. 2, 05.2001, p. 217-224.

Research output: Contribution to journalArticle

Bachle, Laurel ; Eckerson, Joan ; Albertson, Lara ; Ebersole, Kyle ; Goodwin, Jeff ; Petzel, David. / The Effect of Fluid Replacement on Endurance Performance. In: Journal of Strength and Conditioning Research. 2001 ; Vol. 15, No. 2. pp. 217-224.
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