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	WE HAVE AN EPIDEMIC OF OBESITY
	HOW DID OUR POPULATION BECOME OBESE?
	THE NATURE OF BODY WEIGHT REGULATION
	THE ROLE OF GENES
	WHY DOES OUR PHYSIOLOGY PERMIT GRADUAL WEIGHT GAIN
	HOW CAN DIFFERENT ENVIRONMENTS DIFFERENTIALLY AFFECT ENERGY BALANCE?
	WHAT FACTORS IN THE ENVIRONMENT PROMOTE OBESITY?
	FACTORS THAT INCREASE ENERGY INTAKE
	Portion Size
	High Fat/High Energy Density Diets
	Glycemic Index
	Other Environmental Factors Affecting Energy Intake
	FACTORS THAT DECREASE PHYSICAL ACTIVITY
	STRATEGIES FOR DEALING WITH THE OBESITY EPIDEMIC
	MODIFYING THE ENVIRONMENT TO PREVENT WEIGHT GAIN?
	MODIFYING DIET TO PREVENT WEIGHT GAIN
	MODIFYING PHYSICAL ACTIVITY TO PREVENT WEIGHT GAIN
	CHOOSING A STRATEGY TO CHANGE THE ENVIRONMENT
	BEGIN BY INCREASING PHYSICAL ACTIVITY
	FOLLOW WITH FOOD INTAKE
	INSTITUTIONA- LIZING CHANGE
	SUMMARY