Physiologic effects of caffeine on cross-country runners
(Physiologische Auswirkungen von Koffein im Skilanglauf)
This study determined the physiological effects of caffeine on cross-country runners during submaximal exercise. Ten college-age subjects (5 women; 5 men) volunteered to participate in this study. After completing a O2max test, each subject completed 2 30-minute runs at 70% O2max on the treadmill, 1 after ingesting caffeine and the other after ingesting a placebo. A caffeine dosage of 7 mg·kg-1 of body weight was administered. The same dosage of vitamin C was used as a placebo. The order of treatments was randomly assigned, and the trials followed a double-blind format. The physiological data were analyzed using a repeated measures analysis of variance (SPSS). Tidal volume (TV), alveolar ventilation (VA), and rating of perceived exertion (RPE) were significantly different (p < 0.05) between treatment and control groups. The results suggest that the ingestion of caffeine at 7 mg·kg-1 of body weight prior to submaximal running might provide a modest ergogenic effect via improved respiratory efficiency and a psychological lift.
© Copyright 2004 The Journal of Strength and Conditioning Research. National Strength & Conditioning Association. Alle Rechte vorbehalten.
Schlagworte: | ergogenes Mittel Skilanglauf O2-Aufnahme Genussmittel Sportphysiologie Ermüdung |
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Notationen: | Biowissenschaften und Sportmedizin Ausdauersportarten |
Veröffentlicht in: | The Journal of Strength and Conditioning Research |
Veröffentlicht: |
Colorado Springs
2004
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Jahrgang: | 18 |
Heft: | 3 |
Seiten: | 463-465 |
Dokumentenarten: | Artikel |
Sprache: | Englisch |
Level: | hoch |