The widespread popularity of both sports and caffeine, the caffeine ban in Olympic activities, the lack of understanding of the physiological and psychological effects of caffeine on high-intensity, intermittent exercise, all indicate the need for more definitive information concerning the caffeine exercise relationship. Although it is difficult to assess the metabolic effects of sports under field conditions, similar metabolic and circulatory modifications can be produced by interval exercise on the cycle ergometer (Keul, 1971). The purpose of this study was to determine the influence of caffeine treatment upon the serum free fatty acid and glycerol, blood glucose and lactate, as well as perceived exertion, oxygen cost, oxygen debt, and performance time values beyond those caused by three 30-minute/one-minute alternating work/rest intervals under a no caffeine treatment. / Eight, trained, male volunteers--ages 21 to 33 yrs.--served as subjects for this study. The exercise level for the high-intensity interval protocol was set at 85 to 90 percent of the maximal aerobic capacity determined by performance on a continuous cycle ergometer test. Two ergometer performance tests were administered approximately one week apart. For one test subjects ingested 5 mg/kg of caffeine and for the other a placebo one hour before beginning pedalling at 70 RPM at 85 to 90 percent of their maximum aerobic power. / A double blind counterbalanced design was used. All metabolic and respiratory data were calculated using the Apple IIe Computer (REP-200B Data Acquisition System, Vacumetrics, Inc.). A two-factor Analysis of Variance with repeated measures and paired t tests were used to test all hypotheses (p $<$.05). / Caffeine significantly increased time to exhaustion, serum free fatty acids, post-exercise oxygen cost levels and lower post exercise glucose levels. These findings suggest that the caffeine-induced glycogen sparing appears to enhance performance time during high intensity intermittent exercise. This is evidenced by significantly greater fat mobilization, oxygen cost, and higher blood glucose levels under the caffeine treatment. / Source: Dissertation Abstracts International, Volume: 52-10, Section: B, page: 5200. / Major Professor: Emily M. Haymes. / Thesis (Ph.D.)--The Florida State University, 1991.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_76528 |
| Contributors | Trice, Isaiah., Florida State University |
| Source Sets | Florida State University |
| Language | English |
| Detected Language | English |
| Type | Text |
| Format | 198 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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