The Effect of Caffeine on Maximum Oxygen Consumption during Rest, Exercise, and Return to Original State
Saeedeh Yazdani, Saeed Yazdani
Research findings have indicated different influence of caffeine consumption on athletic performance. The purpose of this research was evaluating influence of caffeine consumption on some cardiovascular factors including heart rate and blood pressure during rest, end of exercise and recovery.Subjects of this study were 24 female vollybal athletes with at least one year experience of athletic participation .who participated voluntarily in this study.After recording of some subjects characteristics and assurance of not being sensitive to caffeine, two exercise tests were performed in separate weeks. In first test placebo and in second test caffeine (5 mg/kg) was consumed (one hour before trail) by subjects. heart rate and blood pressure were measured during rest, at the end of exercise testing and during 3rd and 5th minutes of recovery of submaximal test. Maximal oxygen consumption (VO2max) was measured using submaximal cardiorespiratory test on Monark ergometer. T paired test was used for analysis of data. Results: caffeine consumption was effective on Vo2max, hear rate during rest and end of exercise, and end exercise blood pressure (P>0.05). caffeine consumption caused increasing heart rate during 3rd and 5th minutes of recovery, blood pressure during rest, 3rd and 5th minutes of recovery in athletes(p≤o.05).