Chapter 8: Eating Disorders

Energy balance

The state where energy in equals energy out; imbalance leads to weight changes.

Excess energy

Energy that, when consumed more than expended, is stored as fat.

Satiation

The signal to stop eating, triggered when food enters the GI tract.

Satiety

The feeling that suppresses hunger to prevent eating again for a period.

Basal metabolism (BMR)

The energy expended at rest for basic life processes, comprising about 50-65% of total energy.

Resting metabolic rate (RMR)

The rate at which the body expends energy at rest, slightly higher than BMR.

Mifflin-St. Jeor Equation for males

kcal/day = 10(weight in kg) + 6.25(height in cm) - 5(age in years) + 5.

Mifflin-St. Jeor Equation for females

kcal/day = 10(weight in kg) + 6.25(height in cm) - 5(age in years) - 161.

Total Energy Expenditure (TEE)

The total amount of energy expended in a day, including activity level.

Body Mass Index (BMI)

A measurement calculated as weight (kg) / height (m)².

Anorexia Nervosa

An eating disorder characterized by distorted body image, malnutrition, and denial of unhealthy weight loss goals.

Bulimia Nervosa

An eating disorder marked by recurrent binge eating followed by compensatory behaviors to prevent weight gain.

Female Athlete Triad

A combination of disordered eating, amenorrhea, and osteoporosis in female athletes.

Disordered eating

Eating behaviors that are unhealthy, often driven by unrealistic weight standards.

Amenorrhea

The absence of menstruation, often due to low estrogen and associated with infertility and bone loss.

Osteoporosis

A condition characterized by weakened bones, often related to low estrogen levels.

Treatment of Eating Disorders

A multidisciplinary approach involving physicians, nurses, psychiatrists, family therapists, and dietitians due to high mortality rates associated with these disorders.