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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/4496

Title: Effects of physical activity versus cardiorespiratory fitness on selected CAD risk factors in youth
Authors: Al-Hazzaa, Hazzaa M.
Keywords: Physical activity
Cardiorespiratory
Predominantly
Nutritional
Issue Date: Jul-2006
Publisher: Swiss Society of Sports Medicine
Citation: Proceedings of the 11th European College of Sport Science Annual Congress, Lausanne
Abstract: The aim of this study was to examine the effects of physical activity versus cardiorespiratory fitness on selected coronary artery disease (CAD) risk factors in Saudi youth. Participants were 41 young Saudi males (mean age (SD) = 20.5 (1.6)), came from predominantly middle-class family with good nutritional status. They were divided in separate analyses into two groups, based on levels of physical activity and cardiorespiratory fitness. Physical activity was classified according to above or below 30 minutes of daily activity spent above 50% heart rate reserve (active (n=15) averaged 57.1+/- 26.2 min/day, and inactive (n=25) averaged 10.9 +/- 7.9 min/day). Cardiorespiratory fitness was classified according to values either above or below the 50th percentile of VO2 max (fit (n=21) averaged 53.8 +/- 3.7 ml. kg/min, and unfit (n=20) averaged 40.4 +/- 4.3ml. kg/min. The findings of the present study showed that active young males did not differ significantly (p < 0.05) from inactive group in BMI, fat%, abdomen circumference,VO2 max relative to body mass, total cholesterol (TC), triglycerides (TG), LDL-C, systolic(SBP) or diastolic blood pressure (DBP). However, active males had significantly (p <0.05) higher levels of HDL-C (41.2 +/- 4.9 vs 33.6 +/- 7.3 mg/dl) and HDL-C/TC ratio (28.8 +/- 5.9 vs 22.8 +/- 6.9). Fit young males, on the other hands, showed higher values than unfit males in BMI, fat%, abdomen circumference, TC, TG, LDL-C, HDL-C/TC ratio,SBP, DBP and daily time spent in moderate level physical activity. But, when data were reanalyzed while controlling for the effect of body fat%, the differences between fit and unfit males disappeared, except for TG and time spent in moderate level physical activity.It was concluded that cardiorespiratory fitness in youth appeared more important than moderate level physical activity in promoting favorable changes in CAD risk factors. The seemingly positive effects that cardiorespiratory had on CAD risk factors may operate through a lower body fat content.
URI: http://hdl.handle.net/123456789/4496
Appears in Collections:College of Education

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