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体育论文摘要五(英)

2005-12-21 00:00

《北京市体重正常和肥胖人群体力活动状况的研究》

Abstract

    The prevalence of obesity has been rising up all over the world. Obesity is a well-established risk factor for cardiovascular disease, diabetes, hyperlipidemia, hypertension, stroke and some categories of cancers. It is also linked to increased risk for morbidity and mortality. Physical activity is a stronger influence factor on obesity than other environments. However, currently, the studies of physical activity patterns are few.

    Objective: Describe and Compare of physical activity patterns of multitude with different body composition, Provide basis for fat prevention and treatment.

    Objects and Methods: 130 people who take part in “the relative effects of dietary fat and physical activity on body composition” study in 1998-2000. 18 Males with normal weight (body fat percentage), 25 females with normal weight, 45 males with obesity, 42 female with obesity; physical activity (by Computer Science and Applications and WHO MONICA questionnaire), total energy expenditure (by DLW and calculated energy expenditure for all physical activity), percentage body fat (by D2O).

    Results: (1) Kinds, frequency and proportion of physical exercise in normal weight males and females are higher than in those overweight people. The time used in physical exercise by normal weight people is longer than those of overweight people. The difference is obvious (P<0.05). In workdays, the normal weight males spend more time in shopping, doing housework and leisure time talking than obesity males. The normal weight females spend more time in riding bikes for work than obesity females (P<0.05). The normal weight males spend more time in doing housework than those overweight people when the time is longer than or equal to 30 minutes. The difference is obvious (P<0.05). The normal weight males and females spend more time in shopping than those obesity when the time is longer than or equal to 60 minutes. The difference is obvious (P<0.05). In weekends, normal weight males spend more time in leisure time walking than those obesity when the time is longer than or equal to 60 minutes. The difference is obvious (P<0.05). Normal weight females spend more tine in doing housework, shopping, leisure time talking than those obesity. The normal weight females spend more time in leisure time walking than those obesity when the time is longer than or equal to 60 minutes. The difference is obvious (P<0.05). (2) light-intensity physical activity of normal weight males and females are low than those of obesity. They spend more time in moderate- intensity physical activity than obesity. (3) The total energy expenditure by using Doubly Labeled Water and adjusted energy expenditure for CSA shows that: The obesity males and females' total energy expenditure is higher than those of normal weight. The difference is obvious (P<0.01). The obesity males and females' physical activity energy expenditure (AEE) and basal metabolism, energy expenditure are both higher than those of normal weight. The difference is not obvious. (4) The obesity males and females' energy expenditure of per kilogram body weight and physical activity level (PAL) is lower than those of normal weight. The difference is obvious (P<0.05).

    Stepwise multiple regression analysis showed that the dominant factor of %BF in boys is exercise on the weekdays (β= -0.679), and in turn going shopping by feet on the weekdays (β= -0.619), sleeping time (β= -0.468), going shopping by feet on the weekend (β= -0.343); that the dominant factor of %BF in girl is going shopping by feet on the weekdays (β= -0.716), and in turn exercise on the weekdays (β= -0.618), and weekend (β= -0.458), sleeping time (β= -0.343), go and from work by bicycle (β= -0.269), walking on the weekend(β= -0.269).

    Conclusion: The result indicated that: the more time it spend on exercise going shopping by feet on the weekdays sleeping etc. in man, the lower of the risk, it develop obesity, and in woman the more time it spend on going shopping on the weekdays exercise all the week, go and from work by bicycle, sleeping, walking on the weekend, the lower of the risk it becoming obesity. In addition, it‘s show that despite TEE and AEE of obesity group is higher than its normal of weight group, but consume energy per weight in obesity group is distinctly lower than its in normal weight group. The higher physical activity level is, the less risk of obesity is.

    Key Words: percentage of body fat obesity physical activity patterns physical activity level total energy expenditure

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