Abstract
Background: Heart rate monitoring has been advocated for assessing energy expenditure in field studies. The aim of the study is to determine and compare the energy requirements by heart rate method and factorial method and measure PWC170 for young active and sedentary women. Methods: A cross-sectional study on 30 collegiate women (18-23 years) was conducted. Young active (Group A) (n=15) and age matched sedentary women (Group S) (n=15) were selected based on an inclusion criterion. Using standard procedures, data was collected on general information, anthropometry, blood pressure, body composition, PWC170, HR-VO2 relationship, diet and physical activity to compute energy requirements. Results: Individual HR- VO2 equations were developed. Mean TDEE by factorial method for Group A was 2256 ±246 kcal and for Group S was 1772 ± 163 kcal. Mean TDEE by heart rate method of Group A was 1952 ± 68 kcal and of Group S was 1579 ± 116 kcal. Mean PWC170 for Group A and Group S were 94.8 ± 6.9 and 93.5 ± 13.9 watts respectively. PAL for Group A was 32% higher than Group S. Conclusion: The heart rate technique is a useful tool for computing energy requirement of active groups because of its simplicity and potential use in free living conditions.
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