Abstract
1377 The effects of gender on maximal heart rate (MHR) is not well documented in the literature. To determine whether gender influences MHR, we evaluated data from 1003 healthy men and women (age range 39-46 years) undergoing symptom limited exercise treadmill testing. Baseline assessment included history and physical examination to exclude illness and medications, and maximal parameters including heart rate, blood pressure, and expired gas analysis. Fitness level was categorized into Low (VO2max < 26 ml/kg/min), Average(VO2max 27-38 ml/kg/min), and High (VO2max > 39 ml/kg/min). Peak RQ and RPE were similar at maximal O2 consumption. TableTableStatistical analysis was performed by ANOVA. MHR differed for the Low Fitness category ( p<0.001). No gender difference was observed in maximal heart rate for the Average and High Fitness groups. CONCLUSION: There appears to be a gender difference in maximal heart rate in Low Fit individuals and predicted maximal heart rate formula (220-age) may be excessive for Low Fit individuals.
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