Abstract
Anaerobic working capacity (AWC) estimated from the critical power test provides a theoretically and experimentally valid estimate of work capacity associated with muscle energy reserves adenosine triphosphate and phosphocreatine. Creatine monohydrate (CM) supplementation has been shown to increase phosphocreatine stores in skeletal muscle and, in theory, should increase AWC. Therefore, the purpose of this study was to examine the effects of supplementation with CM, CM plus carbohydrate (CHO), or CHO alone on AWC. Using a double-blind random design, 26 young men (mean age ± SD, 19.9 ± 1.6 years) were assigned to 1 of 3 treatment conditions: (a) 35 g of flavored CHO powder as a placebo (PL, n = 8); (b) 5.25 g of CM and 1 g of CHO in a flavored powder blend (CM, n = 9); and (c) 5.25 g of CM and 33 g of CHO in flavored powder blend (CM-CHO, n = 9). The subjects completed 3 phases of testing on an electronically braked cycle ergometer: (a) familiarization (3 learning trials to establish power outputs for subsequent testing); (b) pretesting (4 bouts performed at power outputs selected to elicit fatigue in 1-10 minutes); and (c) posttesting (4 bouts performed at the same power outputs as pretesting but completed after ingesting the supplements 4 times per day for 6 consecutive days). The results indicated that CM and CM-CHO supplementation significantly (p <0.05) increased AWC by 9.4 and 30.7%, respectively. These data suggest that 33 g of CHO may augment the effects of CM supplementation on AWC.
| Original language | English |
|---|---|
| Pages (from-to) | 135-138 |
| Number of pages | 4 |
| Journal | Journal of Strength and Conditioning Research |
| Volume | 13 |
| Issue number | 2 |
| DOIs | |
| State | Published - May 1999 |
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All Science Journal Classification (ASJC) codes
- Public Health, Environmental and Occupational Health
- Physical Therapy, Sports Therapy and Rehabilitation
- Orthopedics and Sports Medicine
Cite this
The Effects of Creatine Supplementation on Anaerobic Working Capacity. / Stout, Jeffrey R.; Eckerson, Joan; Housh, Terry J.; Ebersole, Kyle T.
In: Journal of Strength and Conditioning Research, Vol. 13, No. 2, 05.1999, p. 135-138.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The Effects of Creatine Supplementation on Anaerobic Working Capacity
AU - Stout, Jeffrey R.
AU - Eckerson, Joan
AU - Housh, Terry J.
AU - Ebersole, Kyle T.
PY - 1999/5
Y1 - 1999/5
N2 - Anaerobic working capacity (AWC) estimated from the critical power test provides a theoretically and experimentally valid estimate of work capacity associated with muscle energy reserves adenosine triphosphate and phosphocreatine. Creatine monohydrate (CM) supplementation has been shown to increase phosphocreatine stores in skeletal muscle and, in theory, should increase AWC. Therefore, the purpose of this study was to examine the effects of supplementation with CM, CM plus carbohydrate (CHO), or CHO alone on AWC. Using a double-blind random design, 26 young men (mean age ± SD, 19.9 ± 1.6 years) were assigned to 1 of 3 treatment conditions: (a) 35 g of flavored CHO powder as a placebo (PL, n = 8); (b) 5.25 g of CM and 1 g of CHO in a flavored powder blend (CM, n = 9); and (c) 5.25 g of CM and 33 g of CHO in flavored powder blend (CM-CHO, n = 9). The subjects completed 3 phases of testing on an electronically braked cycle ergometer: (a) familiarization (3 learning trials to establish power outputs for subsequent testing); (b) pretesting (4 bouts performed at power outputs selected to elicit fatigue in 1-10 minutes); and (c) posttesting (4 bouts performed at the same power outputs as pretesting but completed after ingesting the supplements 4 times per day for 6 consecutive days). The results indicated that CM and CM-CHO supplementation significantly (p <0.05) increased AWC by 9.4 and 30.7%, respectively. These data suggest that 33 g of CHO may augment the effects of CM supplementation on AWC.
AB - Anaerobic working capacity (AWC) estimated from the critical power test provides a theoretically and experimentally valid estimate of work capacity associated with muscle energy reserves adenosine triphosphate and phosphocreatine. Creatine monohydrate (CM) supplementation has been shown to increase phosphocreatine stores in skeletal muscle and, in theory, should increase AWC. Therefore, the purpose of this study was to examine the effects of supplementation with CM, CM plus carbohydrate (CHO), or CHO alone on AWC. Using a double-blind random design, 26 young men (mean age ± SD, 19.9 ± 1.6 years) were assigned to 1 of 3 treatment conditions: (a) 35 g of flavored CHO powder as a placebo (PL, n = 8); (b) 5.25 g of CM and 1 g of CHO in a flavored powder blend (CM, n = 9); and (c) 5.25 g of CM and 33 g of CHO in flavored powder blend (CM-CHO, n = 9). The subjects completed 3 phases of testing on an electronically braked cycle ergometer: (a) familiarization (3 learning trials to establish power outputs for subsequent testing); (b) pretesting (4 bouts performed at power outputs selected to elicit fatigue in 1-10 minutes); and (c) posttesting (4 bouts performed at the same power outputs as pretesting but completed after ingesting the supplements 4 times per day for 6 consecutive days). The results indicated that CM and CM-CHO supplementation significantly (p <0.05) increased AWC by 9.4 and 30.7%, respectively. These data suggest that 33 g of CHO may augment the effects of CM supplementation on AWC.
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U2 - 10.1519/1533-4287(1999)013<0135:TEOCSO>2.0.CO;2
DO - 10.1519/1533-4287(1999)013<0135:TEOCSO>2.0.CO;2
M3 - Article
VL - 13
SP - 135
EP - 138
JO - Journal of Strength and Conditioning Research
JF - Journal of Strength and Conditioning Research
SN - 1064-8011
IS - 2
ER -