Energy Expenditure

Definition

Energy expenditure is the total amount of calories burned by the body to maintain basic physiological functions and perform activities.

Scientific / Technical Definition

Energy expenditure is the sum of basal metabolic rate (the energy used at rest), thermic effect of food (the energy used to digest, absorb, and metabolize food), and physical activity energy expenditure. It reflects the total energy cost of maintaining homeostasis and supporting physical activity.

Benefits

• Helps maintain or alter body weight
• Supports bodily functions such as breathing, circulation, and cell production
• Contributes to physical performance and stamina
• Affects metabolic rate, which can influence overall health

Examples

• The calories burned during exercise, such as running or swimming
• The energy used during daily activities such as walking or household chores
• The calories expended through basal metabolic processes

Additional Information

• Importance: Energy expenditure is crucial for weight management and metabolic health. Understanding energy expenditure can help individuals plan nutrition and exercise strategies for well-being and performance.

Related Terms

• Basal Metabolic Rate
• Thermic Effect of Food
• Caloric Intake
• Energy Balance

References

• Total Energy Expenditure: A Review of Components and Methodologies
• Understanding Energy Balance: An Evolving Practice