Energy expenditure

Definition

Energy expenditure is the total amount of energy a person uses to maintain bodily functions and perform physical activities. It is influenced by factors such as basal metabolic rate (BMR), physical activity, and digestion.

5 Must Know Facts For Your Next Test

1. Energy expenditure includes basal metabolic rate, thermic effect of food, and physical activity.
2. Basal metabolic rate accounts for about 60-75% of total energy expenditure.
3. Physical activity can significantly increase daily energy expenditure depending on the intensity and duration.
4. The thermic effect of food generally contributes around 10% of total energy expenditure.
5. Chronic gastrointestinal disorders can alter energy expenditure by affecting nutrient absorption and metabolism.

Review Questions

• What are the three main components of energy expenditure?
• How does basal metabolic rate contribute to total energy expenditure?
• In what ways can gastrointestinal health impact energy expenditure?

Related terms

Basal Metabolic Rate (BMR): The amount of energy expended while at rest in a neutrally temperate environment.

Thermic Effect of Food (TEF): The increase in metabolic rate after ingestion of a meal.

Physical Activity Level (PAL): A measure of the amount and intensity of physical activity performed over a period.