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B-13J FREE COMMUNICATION/POSTER EPIDEMIOLOGY OF EXERCISE AND DISEASE

CARDIOVASCULAR DISEASE RISK FACTORS IN MIDDLE-AGED HONG KONG CHINESE AND IT'S ASSOCIATION WITH PHYSICAL FITNESS

Hui, S C. FACSM1; Thomas, G N.1; Tomlinson, B1

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Medicine & Science in Sports & Exercise: May 2003 - Volume 35 - Issue 5 - p S71
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Cardiovascular disease (CVD) risk factor profiles and their association with physical fitness have been well-documented in western studies, but few studies are found to report these associations in Chinese men and women.

PURPOSE

To examine the CVD risk factors of middle-aged Chinese in Hong Kong and the impact of physical fitness on CVD risk factors.

METHODS

A total of 316 middle-age Chinese (age: 45.1 ± 8.1yrs.) men and women, who were recruited from a randomized citywide telephone survey, volunteered to participate in this study. Fasting blood samples from subjects were collected to determine levels of LDL, HDL, and total cholesterol, as well as triglycerides and plasma glucose. Physical fitness, in terms of VO2max, was estimated from a submaximal treadmill walking/jogging test. Physical activity level was measured from a self-reported activity rating. Other CVD risks such as smoking habits, family history, blood pressure, body mass index (BMI) and waist circumference (WC) were also measured. Definitions of CVD risks were adopted from the ACSM (2000).

RESULTS

68% of men and 38.4% of women had 2 or more CVD risks. 48.1% of men and 33.1% of women had hyperlipidemia. A significant association was found between VO2max and CVD risks. The relative risk (RR) of having CVD risk factors for unfit individuals ranged from 1.25 to 4.4. The unfit-men demonstrated 4 times the risk of fit-men for having high triglycerides, whereas the unfit-women had more than 4 times the risk of fit-women for having impaired plasma glucose. WC was found to be a stronger predictor than BMI for CVD risk. Regression analyses found that the suggested thresholds for maintaining heart health were: VO2max – 34 ml/kg/min for men, 30 ml/kg/min for women; WC – 84 cm for men, 77 cm for women; BMI V 23.5 increased risk, 25 high risk.

CONCLUSION

The prevalence of CVD risk factors in Chinese men and women in Hong Kong were high and were related to level of aerobic fitness and body composition. The need for heart health and fitness improvement intervention programs is evident.

©2003The American College of Sports Medicine