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The Effects of Environmental Conditions on Activity, Feeding, and Body Weight in Male and Female Adolescent Rats

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Technical Report

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Uniformed Services University Of The Health Sciences Bethesda United States

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Excessive body weight, particularly in children, is a growing concern in the United States and around the world. Body weight is affected by feeding behavior and physical activity. Environmental factors affect feeding behaviors and physical activity therefore, environment is an important influence on body weight. Three separate experiments examined the behavioral effects of environmental enrichments on feeding, activity, and body weight. For the first two experiments, subjects were 36 adolescent, male Experiment I and 36 adolescent female Experiment II Sprague-Dawley rats. Experiment III examined the behavioral effects of enrichment on 24 male and 24 female adolescent Sprague-Dawley rats. Responses to environmental enrichment included body weight BW, Body Mass Index score BMI, Lee Index score LI, consumption of standard rat chow, Oreo TM cookies, and Lays TM potato chips, and physical activity PA in the animals home cage HCA and in an open field OF. truncated

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