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Effects of XS® Energy Drink on aerobic exercise capacity
Author(s) -
Sheehan Kevin Michael,
Hartzler Lynn K
Publication year - 2010
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.24.1_supplement.991.6
Subject(s) - treadmill , aerobic exercise , aerobic capacity , placebo , heart rate , caffeine , crossover study , taurine , alertness , physical therapy , bruce protocol , athletes , medicine , time trial , anaerobic exercise , psychology , zoology , chemistry , blood pressure , pharmacology , biology , biochemistry , alternative medicine , amino acid , pathology
This project examines effects of taking XS® Energy Drink for the purpose of enhancing aerobic exercise capacity and performance. XS® Energy Drink contains B vitamins, caffeine, taurine, and an adaptogen blend and is primarily designed and marketed to stimulate alertness; however, it is also marketed to athletes claiming to enhance performance. Our hypothesis is that consuming the XS® Energy Drink before exercise increases aerobic capacity and the time to muscle fatigue when compared with a placebo. We also hypothesize that consuming XS® Energy Drink before exercise decreases recovery time. Twelve physically fit 18–24 year olds performed two VO 2 max tests according to a modified Ellestad Treadmill Protocol using a randomized double‐blind cross over method. We found no significant differences with XS® Energy Drink: VO 2 max (p = 0.99), time until muscle fatigue (p = 0.48), maximum heart rate (p = 0.66), V E max (p = 0.10), time at which R > 1 (p = 0.50), or recovery time to 50% VO 2 max (p = 0.67). We found the second trial to be significantly longer than the first (p = 0.01) likely due to desire to improve exercise time or familiarization with testing procedures. Our results show no physiological effects of XS® Energy Drink; however, we have not eliminated a possibility of psychological advantage. Supported by an undergraduate research fellowship and University Honors Program grant from Wright State University (KMS).