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 language | English |
|---|---|
| Pages (from-to) | 217-224 |
| Number of pages | 8 |
| Journal | Journal of Strength and Conditioning Research |
| Volume | 15 |
| Issue number | 2 |
| DOIs | |
| State | Published - May 2001 |
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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 journal › Article
}
TY - JOUR
T1 - The Effect of Fluid Replacement on Endurance Performance
AU - Bachle, Laurel
AU - Eckerson, Joan
AU - Albertson, Lara
AU - Ebersole, Kyle
AU - Goodwin, Jeff
AU - Petzel, David
PY - 2001/5
Y1 - 2001/5
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0035346381&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035346381&partnerID=8YFLogxK
U2 - 10.1519/1533-4287(2001)015<0217:TEOFRO>2.0.CO;2
DO - 10.1519/1533-4287(2001)015<0217:TEOFRO>2.0.CO;2
M3 - Article
VL - 15
SP - 217
EP - 224
JO - Journal of Strength and Conditioning Research
JF - Journal of Strength and Conditioning Research
SN - 1064-8011
IS - 2
ER -