Abstract P274: Predictive Value of the International Physical Activity Questionnaire of the Aerobic Capacity in Sedentary Hypertensive Women.
Background: There is consensus in the value of assessing and counseling hypertensive patients in reference to their physical activities (PA). The International Physical Activity Questionnaire (IPAQ) is a commonly used instrument to asses the energy expenditure (EE) through different domains of daily activity. Objectives: The main purpose of this study was to assess the relation of self-reported PA through the IPAQ and the aerobic capacity using oxygen consumption (VO2) measured directly in hypertensive sedentary women.
Methods: Cross-sectional study in a simple random sub-sample of 64 hypertensive women between 35 and 55 years old, without physical limitation or coronary event. PA was evaluated using the Spanish version of the IPAQ to assess the energy expenditure (EE) and PA intensity (moderate or vigorous) in different domains (work, transport, domestic, leisure). VO2 peak was measured directly, breath to breath (Fitmate Pro®), at a submaximal (85% [85 of 100] maximal heart rate) exercise test with 25 watt/3 min load increments in a bicycle ergometer.
Results: Mean age was 48.4±5.2 years. Measured peak VO2 was 16.5±2.6 mL/Kg/min with a predicted VO2max of 23±3.7 mL/Kg/min, both corresponding to a sedentary level. The greater proportion of EE was observed in work and domestic domains in contrast to leisure activities that had the lowest. Over 50% (1 of 2) of the PA was done at moderate intensity. Peak VO2 showed a direct correlation with total EE, work and domestic, and finally, with the cost in PA done at moderate intensity.
|Domain or PA type IPAQ||EE (MET-min/week)*||EE(%)†||Pearson's Correlation coefficient|
|VO2 peak (ml/Kg/min)||p-value|
|IPAQ total||3,613 (1,976 - 5,589)||−||0.539||0.001|
|Work||358 (0 - 2,230)||25.4||0.577||0.001|
|Transport||396 (89 - 795)||15.5||−0.103||0.542|
|Domestic||1,465 (893 - 2,520)||47.1||0.385||0.018|
|Leisure||153 (0 - 664)||13.1||−0.011||0.950|
|Moderate||1,672 (978 - 3,275)||57.4||0.560||0.001|
|Vigorous||0 (0 - 1,216)||12.8||0.249||0.136|
Conclusion: In sedentary hypertensive women self reported PA using IPAQ is predominantly related to domestic and work activities at moderate intensity. Work, and domestic EE or moderate intensity global PA correlated well with the peak VO2 directly measured during a sub maximal exercise test. Thus, IPAQ appears as an adequate instrument to assess the EE of hypertensive patients and its impact on their aerobic capacity.
- © 2012 by American Heart Association, Inc.