Prescription weight-loss drugs
Reduce appetite by affecting brain neurotransmitters
for example, phentermine, trade name Adipex
Decrease fat absorption in the intestine
for example, orlistat, brand name Xenical
Recommended only if health
Physical activity & PA level
Estimated energy requirements
Why are more Americans obese today compared to 40 years ago?
What happens to energy stores when energy intake exceeds expenditure?
Which component of energy expenditure is easiest to modify?
Percent body fat
Young, healthy female: 2132% of total weight
Young, healthy male: 819% of total weight
Lean body mass decreases
Body fat increases
Measuring body composition
Body fat location
Subcutaneous fat: adipose tissue under the skin, for
Energy Balance and Weight Management
What is BMI?
Excess body fat increases health risks
high blood pressure
high blood cholesterol
Excess body fat increases
Powerful urges to overeat with a morbid fear of becoming fat
Characterized by: intense fear of becoming fat, negative body image, and
distorted perception of body size
Behaviors: semi-starvation interrupted by periods of gorging followed b
Weight cycling or yo-yo dieting
What should I eat?
Balance your intake and output
Cut down on calories
THINK about this then share within a PAIR then SHARE with the class
What could be done to decrease obesity?
Liposuction: a large hollow needle is inserted under the skin into a fat
deposit to vacuum out the fat = cosmetic
Is surgery a good solution to obesity?
Abnormal or disordered eating
Psychological illness cha
Basal metabolism: includes all essential metabolic functions to keep you
Basal metabolic rate (BMR): energy expended for basal metabolism
Thermic effect of food (TEF) or diet-induced thermogenesis: energy
required for food digestion, absorption, met
Feeling of fullness and satisfaction caused by food consumption that
eliminates desire to eat
Short-term regulation of food intake
Hormones & weight control
Ghrelin: released by the stomach to stimulate the desire to eat at usual
What to eat after exercise
Replace lost fluids
Replace glycogen stores:
For 3060 minutes of daily exercise, a typical diet with about 55% of
calories is sufficient
For serious athletes competing on consecutive days, a high-carbohydrate
meal or drink (11.5