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Objectives: The purpose of this study was to investigate overall and sex differences of cardiovascular function, rating of perceived exertion, energy expenditure and the level of exercise testing to the heart rate maximizer test in both sexes of healthy young adults.
Methods: One-hundred healthy young adults including 50 males (mean age 22.7±3.1 years) and 50 females (mean age 22.7±3.3 years) participated in the study. Participants completed two minutes of the heart rate maximizer test. Measurements included heart rate (HR), systolic blood pressure (SBP), rating of perceived exertion (RPE), energy expenditure (EE) at baseline, during testing and 5 minutes of recovery period. A heart rate recovery (HRR) was calculated.
Results: During performing the heart rate maximizer test, HR, SBP and RPE increased dramatically and reached the peak at two minutes of the test which is about 90% maximal HR (HRMax) and RPE of 16, respectively. For period of recovery, HR, RPE and SBP decreased rapidly then HR became plateau at 4th and 5th minute of recovery. All variables, however, still be higher than at baseline. Although trends of all variables looked similar between gender, HRR in first minute, SBP and EE were significantly higher and RPE in second minute of recovery was significantly lower in males compared to females (p<0.05).
Conclusion: The heart rate maximizer test can be used as a safe vigorous exercise testing for evaluating of cardiovascular system. Despite similar trends were observed in most parameters for both genders, sex differences in cardiovascular function can be found in this study by considering HRR in first minute, SBP, EE and RPE.
Bull Chiang Mai Assoc Med Sci 2016; 49(2): 263-275. Doi: 10.14456/jams.2016.17
Personal views expressed by the contributors in their articles are not necessarily those of the Journal of Associated Medical Sciences, Faculty of Associated Medical Sciences, Chiang Mai University.
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