Author Ng, Gillian Bee Kit
Title Blood lipids, lipoproteins, apoproteins and cardiovascular fitness in obese and non-obese Singaporean Chinese male adolescents 13 to 15 years of age.

Academic Exercise (B.Sc. Hons.) National Institute of Education, Nanyang Technological University

Year 1997
Supervisor Stensel, David
Call no. GV436 Ng

Increasing affluence in Singapore during the last decade has led to a higher prevalence of coronary heart disease and obesity among Singaporeans. Recent evidence has suggested an unfavourable blood lipid / lipoprotein profile among Singaporean children and adolescents. Obesity and the physical fitness of Singaporean schoolchildren is of national concern. Very few studies, however, have examined the relationships between blood lipids / lipoproteins, obesity and cardiovascular fitness in Singaporean schoolchildren. Hence, the purpose of this study is to investigate these relationships in obese and non - obese Singaporean schoolchildren aged 13 to 15 years.

78 Chinese boys ( mean age = 13.52 + 0.6 SD ) were recruited for this study. AU subjects underwent 3 different tests : ( a ) body composition analysis - measurements of height and weight, 8 site skinfold thickness, and DEXA scanning to determine fat mass and lean body mass; ( b ) blood biochemistry analysis - drawing of 20ml of venous blood to analyse serum cholesterol, triglyceride, high density and low density lipoproteins, and apoproteins A1 and B ( c ) cardiovascular fitness testing - using the modified Balke protocol to determine 90zpeak of subjects

Results showed that obese subjects had significantly higher levels of triglyceride and lower levels of VO2peak ('min.' ) as compared to the non - obese subjects. A significant negative correlation also existed between VO2peak ('.min-' ), triglyceride and obesity measures like BM1 and skinfold thickness. None of the other blood profile variables, however, had significant associations with obesity and cardiovascular fitness.

This study may be improved by examining the role of habitual physical activity on blood lipid I lipoprotein profile, obesity and cardiovascular fitness in Singaporean male adolescents.