R . W . Jeffery

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Obesity has increased dramatically over the past two decades and currently about 50% of US adults and 25% of US children are overweight. The current epidemic of obesity is caused largely by an environment that promotes excessive food intake and discourages physical activity. This chapter reviews what is known about environmental influences on physical(More)
Intervention strategies for promoting long-term weight loss are examined empirically and conceptually. Weight control research over the last 20 years has dramatically improved short-term treatment efficacy but has been less successful in improving long-term success. Interventions in preadolescent children show greater long-term efficacy than in adults.(More)
OBJECTIVES This study examined the effects of pricing and promotion strategies on purchases of low-fat snacks from vending machines. METHODS Low-fat snacks were added to 55 vending machines in a convenience sample of 12 secondary schools and 12 worksites. Four pricing levels (equal price, 10% reduction, 25% reduction, 50% reduction) and 3 promotional(More)
OBJECTIVES The purpose of this research was to examine the social, educational, and psychological correlates of weight status in an adolescent population. It was hypothesized that obese adolescents would differ on psychological, social, and educational variables compared with their non-overweight peers. RESEARCH METHODS AND PROCEDURES In this(More)
In light of the well-documented health benefits of physical activity and the fact that the majority of adult men and women are inactive, promoting regular physical activity is a public health priority. This chapter reviews current research findings regarding the determinants of exercise behavior. It also discusses the implications of this knowledge for(More)
Obesity and health behaviors that influence energy balance (diet, exercise, and dieting to lose weight) were examined in a population of 2108 and 2539 working men and women in relation to socioeconomic status (SES). The hypothesis investigated was that the inverse relationship between SES and obesity observed in a number of studies is due to the fact that(More)
OBJECTIVE: To examine demographic, behavioral and dietary correlates of frequency of fast food restaurant use in a community-based sample of 891 adult women.DESIGN: A survey was administered at baseline and 3 y later as part of a randomized, prospective intervention trial on weight gain prevention.SUBJECTS: Women (n=891) aged 20–45 y who enrolled in the(More)
This paper analyzes demographic, social, psychological, and behavioral correlates of weight loss and maintenance in a group of 89 middle-aged men. Measures were collected before and after a 15-week intervention program and at 3-month and 1-year follow-up evaluations. Associations were examined through 2 years of follow-up observation. Principal findings(More)
OBJECTIVES This study assessed the impact on stair use of improving the attractiveness of a stairwell. METHODS Observations of stair usage were made in a university building during baseline, 2 interventions, and follow-up. The first intervention involved signs; the second intervention added artwork and music in the stairwell. RESULTS More participants(More)