Presented by the American College of Sports Medicine (ACSM)

Brief Description of Topic and Sub-Topics:

Physical activity and energy expenditure have been implicated as key contributors to body weight regulation, with the lack of physical activity and low energy expenditure implicated in the development of obesity. However, specific contributions of physical activity and energy expenditure to weight gain and the potential development of obesity are not well understood. Thus, this session will focus on evolutionary, population-based, and laboratory-based scientific evidence to understand these associations. Enhanced understanding of these complex issues is key to developing individual and population-based interventions to prevent and treat obesity.

Target Audience: Basic, clinical, and population-based scientists

Educational Objectives:

  • To describe the evolutionary changes in energy expenditure and physical activity, and to examine their potential impact on the increasing prevalence of obesity.
  • To describe societal-wide changes in physical activity and energy expenditure, and to examine their association with weight gain and the development of obesity.
  • To describe variability in energy expenditure in laboratory-based setting, and to examine how this variability may contribute to energy balance.

10:15am Physical Activity, Energy Expenditure, and Metabolic Adaptation from Hunter Gatherers and other Traditional Populations
Herman Pontzer, PhD
10:45am Are there Associations Between Energy Expenditure and Weight Gain? Examples from Across the Epidemiologic Transition
Amy Luke, PhD
11:15am Small Environmental Differences Induce Large Changes in Human Energy Expenditure
Kevin D Hall, PhD