Title: Effect of Caffeine on Cardiorespiratory Parameters in Sedentary, Healthy Young Male Adults
Authors: Dr Nazish Shaikh, Dr Sonali Pande, Dr Arun Chutani
DOI: https://dx.doi.org/10.18535/jmscr/v5i1.87
Abstract
Background: In current days of highly competitive life, all of us are under pressure to perform better. Once we reach optimal level of performance according to genetic makeup, the subsequent increment in performance depends upon various ergogenic methods to enhance the energy delivery system. Of the various ergogenic methods available to achieve excellence, caffeine consumption is increasingly popular.
Aims and Objectives: The present study was undertaken to study the effect of caffeine (6mg/kg body weight) on cardiovascular & respiratory parameters after 5 minutes of stationary cycling on a bicycle ergometer, in sedentary young male adults of age 18-26 years.
Materials and Methods: The participants were made to complete a graded exercise protocol on a bicycle Ergometer in order to determine the power output required to elicit a THR, equating to 55% of individual age predicted maximum HR (220 - age). The following parameters were measured, Systolic BP (SBP) in mm Hg, Diastolic BP (DBP) in mm Hg, Mean Arterial Pressure (MAP) in mm Hg, Maximum heart rate in beats per minute (bpm), Target heart rate (THR) in beats per minute (bpm), Double product of HR & SBP, Respiratory rate (RR) per minute, Maximum volume of oxygen consumption by body in each minute during exercise (VO2max) in ml/kg/min. At the end of 5 minutes (i.e. during recovery period ), subjects pulse rate was measured at three different times: at the end of 1 minute , 3 minutes , 5 minutes after the exercise was over. In the second visit after 2 days of first session the same participants were given caffeine anhydrous powder in a dose of 6mg/kg of body weight, one hour prior to exercise session and after 5 minutes of exercise session, the above mentioned parameters were measured. All the mentioned parameters before and after caffeine consumption were compared using Paired t- test.
Results: There was statistically significant increase in systolic blood pressure, diastolic blood pressure, mean arterial pressure, target heart rate, double product of heart rate and systolic blood pressure, in respiratory rate, 1 minute post-exercise heart rate (PHR1),3 minute post-exercise heart rate (PHR3) , 5 minute post-exercise heart rate (PHR5) and significant decrease in VO2max, after one hour of caffeine consumption with exercise in male and female participants.
Conclusion: The present study shows that caffeine ( 6mg / kg body weight) ingestion prior to a short term exercise has an ergogenic effect by making appropriate changes in above mentioned cardiovascular & respiratory parameters in a normal young adults of age 18-26 years.
Keywords-caffeine, submaximal exercise, cardiopulmonary parameters, VO2max.
