influence of caffeine consumption on heart rate and blood pressure during rest and ‎exercise ‎

some studies have evaluated influence of caffeine consumption on athletic ‎performance from different aspects. But, findings are different. The purpose of this research ‎was evaluating influence of caffeine consumption on some of cardiovascular factors ‎including heart rate and blood pressure during rest, end of exercise, and during 3rd and 5th ‎minutes of recovery.‎ Subjects of this study included 20 female athletes who participated in study ‎voluntarily. two exercise tests were performed separately by week interval. subjects ‎consumed placebo in the 1st and caffeine (5mg/kg) in the second test session. Heart rate and ‎blood pressure were measured during rest, at the end of exercise testing and during 3rd and 5th ‎minutes of recovery after submaximal test. Maximal oxygen consumption (VO2max) was ‎measured using Fax submaximal cardiorespiratory test. t paired test was used for analysis of ‎data. ‎ caffeine consumption was not significantly effective on Vo2max, heart rate during ‎rest and at the end of exercise, and blood pressure recorded at the end of exercise. Caffeine ‎consumption caused significant increasing of heart rate during 3rd and 5th minutes of ‎recovery, and blood pressure during rest, 3rd and 5th minutes of recovery in athletes. considering increasing of blood pressure and heart rate as a result of caffeine ‎consumption, caffeine consumption (5 mg/kg) before submaximal exercise is not ‎recommended to those who suffer hypertension or cardiac disease or do exercise for health or ‎athletic purposes.‎