KINE 3305 - Exercise Physiology: Energy Expenditure

These flashcards cover key concepts related to energy expenditure and exercise physiology, including calorimetry, VO2max, and metabolic processes.

Calorimetry

A method used to measure the amount of energy expended by the body through heat production.

VO2max

The maximal oxygen uptake, representing the maximum rate of oxygen consumption during intense exercise.

Oxygen Deficit

The difference between the oxygen required for a given exercise intensity and the actual oxygen consumed.

Excess Post-exercise Oxygen Consumption (EPOC)

The amount of oxygen the body requires to return to its resting state after exercise.

Respiratory Exchange Ratio (RER)

The ratio of carbon dioxide produced to oxygen consumed, reflecting the type of substrate being oxidized.

Lactate Threshold

The exercise intensity at which lactate begins to accumulate in the blood.

Indirect Calorimetry

A method to estimate total energy expenditure by measuring the volume of oxygen used and carbon dioxide produced.

Basal Metabolic Rate (BMR)

The rate of energy expenditure at rest in a thermoneutral environment after 8 hours of sleep and 12 hours of fasting.

Resting Metabolic Rate (RMR)

Similar to BMR, but measured under less strict standards, representing energy expenditure during rest.

Energy Expenditure

The amount of energy used by the body during various activities, measured in calories.

Substrate Metabolism Efficiency

The percentage of energy derived from substrates (such as carbohydrates and fats) during metabolism.

Anaerobic Capacity

The maximum energy production through anaerobic metabolic pathways during high-intensity exercise.

Type II Muscle Fibers

Fast-twitch muscle fibers that are less efficient and more recruited during high-power output activities.

Energy Expenditure During Maximal Aerobic Exercise

A measurement that indicates the point at which oxygen consumption does not increase with further increases in intensity.

Crossover Concept

The concept describing the shift from fat to carbohydrate as the predominant energy source during increasing exercise intensity.