Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Date of Award

Summer 2011

Document Type


Degree Name

Master of Science (MS)


Department of Kinesiology


Purpose: The purpose of this investigation was to examine the effects of SR2W-1 herbal supplementation on cycling performance, muscle and blood lactate, and various physiological parameters including blood glucose, heart rate (HR), rating of perceived exertion (RPE), oxygen consumption (VO2), expired ventilation (VE), respiratory exchange ratio (RER), and femoral artery blood flow. Methods: Seven recreational cyclists (Age: 26.7 ± 9.8 yrs, Height: 172.5 ± 13.3 cm, Weight:67.1 ± 10.7 kg, and VO2max: 59.5 ± 11 mL/kg/min) performed 20-min of steady-state cycling (~85% VO2max, 212.1 ± 25.0 W) followed by three 1-min high intensity intervals at VO2max workload (272.9 ± 26.9) with 30-sec active recovery periods at 100 watts. Following intervals, a 15-min passive recovery period preceded a ride to fatigue at VO2max workload. Subjects completed trials on four occasions; preceding and following 21 days of 1000mg/d SR2W-1 (EXP) or 1000mg/d placebo (PLA) assigned in random order. The Wilcoxon Signed-Rank Test was used to compare change-scores from pre- to post- PLA and EXP conditions. Results: No differences reported for any dependent variable and performance times were not different between PLA (pre-PLA: 180 ± 48 s; post-PLA: 198 ± 56 s) and EXP (pre-EXP: 170 ± 57 s; post-EXP: 191 ± 50 s). Conclusion: Notwithstanding the small sample size, 3 weeks of SR2W-1 supplementation does not appear to aid cycling performance, attenuate skeletal muscle fatigue, or modify general physiological responses to exercise.

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