PHYL2730: Energy Systems During Exercise

These flashcards cover key concepts from the PHYL2730 lecture on energy systems during exercise.

Respiratory Exchange Ratio (RER)

The ratio between rates of CO2 production and O2 usage, used to predict substrate use during metabolism.

Fuels for Exercise

Refers to the types of energy sources (carbohydrates and fats) utilized during physical activity, influenced by exercise duration and intensity.

Lactate Threshold

The point at which blood lactate accumulation increases markedly, indicating the balance between lactate production and clearance.

ATP turnover

The rate at which ATP is produced and utilized in the body, measured in kilocalories per kilogram per minute.

Metabolic Equivalent (MET)

A unit used to estimate the amount of oxygen consumed during physical activity, representing the metabolic rate at rest.

Energy Expenditure

The total amount of energy used by the body in a given time period, expressed in calories or kilojoules.

Indirect Calorimetry

A method of estimating energy expenditure by measuring the amounts of oxygen consumed and carbon dioxide produced.

EPOC (Excess Post-exercise Oxygen Consumption)

The increased rate of oxygen intake following strenuous activity intended to erase the body's oxygen deficit.

Economy of Effort

A measure of how effectively an athlete uses energy at a given pace, improving with training and skill.

VO2 max

The maximum volume of oxygen consumed during intense exercise, related to an individual's aerobic capacity.