Effects of eight weeks of caffeine supplementation and endurance training on aerobic fitness and body composition
Deutscher übersetzter Titel: | Die Auswirkungen einer achtwöchigen Koffeinzufuhr und von Ausdauertraining auf die aerobe Fitness und die Körperzusammensetzung |
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Autor: | Malek, Moh H.; Housh, Terry J.; Coburn, Jared W.; Beck, Travis W.; Schmidt, Richard J.; Housh, Dona J.; Johnson, Glen O. |
Erschienen in: | Journal of strength and conditioning research |
Veröffentlicht: | 20 (2006), 4, S. 751-755, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 1064-8011, 1533-4287 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201205003414 |
Quelle: | BISp |
Abstract
The purpose of this study was to examine the effects of daily administration of a supplement that contained caffeine in conjunction with 8 weeks of aerobic training on [latin capital V with dot above]O2peak, time to running exhaustion at 90% [latin capital V with dot above]O2peak, body weight, and body composition. Thirty-six college students (14 men and 22 women; mean ± SD, age 22.4 ± 2.9 years) volunteered for this investigation and were randomized into either a placebo (n = 18) or supplement group (n = 18). The subjects ingested 1 dose (3 pills = 201 mg of caffeine) of the placebo or supplement per day during the study period. In addition, the subjects performed treadmill running for 45 minutes at 75% of the heart rate at [latin capital V with dot above]O2peak, three times per week for 8 weeks. All subjects were tested pretraining and posttraining for [latin capital V with dot above]O2peak, time to running exhaustion (TRE) at 90% [latin capital V with dot above]O2peak, body weight (BW), percentage body fat (%FAT), fat weight (FW), and fat-free weight (FFW). The results indicated that there were equivalent training-induced increases (p < 0.05) in [latin capital V with dot above]O2 peak and TRE for the supplement and placebo groups, but no changes (p > 0.05) in BW, %FAT, FW, or FFW for either group. These findings indicated that chronic use of the caffeine-containing supplement in the present study, in conjunction with aerobic training, provided no ergogenic effects as measured by [latin capital V with dot above]O2peak and TRE, and the supplement was of no benefit for altering body weight or body composition. Verf.-Referat