Tidal volume is the volume of air breathed in or out in one breath. A typical resting value is about 0.5 litres.

How does minute ventilation respond to submaximal exercise?

Minute ventilation rises sharply at the start of submaximal exercise and then more gradually. A plateau follows once oxygen supply matches demand, which is steady state.

How does minute ventilation respond to maximal exercise?

Minute ventilation keeps rising throughout maximal exercise and does not plateau. Values of 150 L/min or more are possible in large, trained performers.

How do tidal volume and breathing frequency change as exercise intensity rises?

Tidal volume increases at first, then plateaus at high intensities. The breathing rate keeps rising and becomes the main source of extra ventilation.

WJEC A-Level Physical Education 601-8485-1

Performance Analysis and Fitness Testing

Topic overview The coaching process and approaches to performance analysis Video, notational and time-motion analysis Laboratory and field-based fitness testing Validity, reliability and interpreting test results

Levers and Movement Analysis

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Short-Term Responses to Exercise

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Short-Term Responses to Exercise

Respiratory response to exercise intensity

3 things to know
A2 Unit 3

Overview

Tidal volume and minute ventilation with a worked example, ventilation in submaximal and maximal exercise, breathing frequency, the anticipatory rise, chemoreceptors, proprioceptors, thermoreceptors, baroreceptors and active expiration.

What you need to know

Answer each one before you reveal it.

Your recallNot started

Key term

Define tidal volume.

Key term

Define minute ventilation and give its equation.

Numbers

A performer at rest breathes 12 times a minute with a tidal volume of 0.5 L. Calculate the minute ventilation.

Questions from this subtopic

Each one with the model answer underneath.

1
Define tidal volume.
Model answer
Tidal volume is the volume of air breathed in or out in one breath. A typical resting value is about 0.5 litres.
2
Define minute ventilation and give its equation.
Model answer
Minute ventilation is the volume of air breathed in or out per minute. Minute ventilation equals tidal volume multiplied by breathing frequency.
3
A performer at rest breathes 12 times a minute with a tidal volume of 0.5 L. Calculate the minute ventilation.
Model answer
Minute ventilation is 0.5 L × 12 = 6 L/min. A value of 6 L/min is typical for a healthy adult at rest.
4
How does minute ventilation respond to submaximal exercise?
Model answer
Minute ventilation rises sharply at the start of submaximal exercise and then more gradually. A plateau follows once oxygen supply matches demand, which is steady state.
5
How does minute ventilation respond to maximal exercise?
Model answer
Minute ventilation keeps rising throughout maximal exercise and does not plateau. Values of 150 L/min or more are possible in large, trained performers.
6
How do tidal volume and breathing frequency change as exercise intensity rises?
Model answer
Tidal volume increases at first, then plateaus at high intensities. The breathing rate keeps rising and becomes the main source of extra ventilation.

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Performance Analysis and Fitness Testing

Levers and Movement Analysis

Joints and the Musculo-Skeletal System

Components of Fitness and Methods of Training

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