The purpose of this study was to determine the effect of caffeine (5 mg/kg body weight) on moderate exercise (100W) under cold (5(DEGREES)C) and neutral (25(DEGREES)C) conditions. Six male subjects, ages 22-31 years, were asked to ingest 300 ml of a decaffeinated coffee solution (with or without caffeine added), rest for 30 minutes, then exercise for 90 minutes on a cycle ergometer at a moderate intensity in either a cold or netural environment on four different occasions. Blood samples were taken prior to coffee ingestion, end of rest, middle of exercise, and immediately post-exercise. Gas samples, heart rates, and body temperatures were recorded every 15 minutes during rest and every 30 minutes throughout exercise. / The results indicated that caffeine increased V(,E),(' )V(,O(,2)), and metabolism during only the resting conditions. Caffeine had no significant influence upon FFA and glucose mobilization and utilization during rest or moderate exercise in a cold or netural environment. Cold exposure during rest stimulated increases in lactate, hemoconcentration, V(,O(,2)),(' )and metabolism. Similar increases were noted during submaximal exercise at 100W in the neutral environment. Exercise also produced similar increases in fat utilization in neutral and cold environments. Mean skin temperatures decreased significantly in the cold while core temperatures remained stable. The results of this study suggest that cold exposure after caffeine ingestion suppresses the physiological effects of caffeine during exercise because of increased blood lactate levels and shivering. / Source: Dissertation Abstracts International, Volume: 43-09, Section: A, page: 2930. / Thesis (Ph.D.)--The Florida State University, 1982.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_74928 |
| Contributors | TEMPLES, THOMAS EUGENE., Florida State University |
| Source Sets | Florida State University |
| Detected Language | English |
| Type | Text |
| Format | 221 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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