Starter quiz
- Anaerobic exercise causes the build up of ...
- lactic acid. ✓
- oxygen.
- nitrogen.
-
- The point at which lactic acid levels increase rapidly is called the ...
- aerobic threshold.
- anaerobic threshold. ✓
- lactate moment.
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- Match the following sports to the predominant energy system used to fuel participation.
- aerobic respiration⇔marathon run ✓
- anaerobic respiration⇔long jump ✓
- aerobic and anaerobic⇔centre during a netball game ✓
- What happens to your heart rate immediately after exercise?
- It returns straight back to resting levels.
- It returns to zero.
- It remains elevated and reduces slowly. ✓
- It remains elevated for hours.
-
- Which of the following events results in an elevated breathing rate for the longest after exercise?
- high jump
- a platform dive
- a 400 metre sprint ✓
- throwing a dart
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- Which of the following is the best thing to do after exercise?
- Get your heart and breathing rate back to resting levels as fast as possible.
- Keep heart and breathing rates elevated. ✓
- Keep breathing rate elevated but reduce heart rate quickly.
- Sit down and rest with head between your knees.
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Exit quiz
- ______ acid is produced in the muscles when insufficient oxygen is supplied during exercise.
- 'lactic' ✓
- Oxygen debt builds up rapidly during ...
- aerobic work.
- anaerobic work. ✓
- endurance events at low intensity.
- explosive events requiring speed and power. ✓
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- Place these events in order to describe what happens during anaerobic exercise.
- 1⇔anaerobic exercise produces
- 2⇔lactic acid which needs to be
- 3⇔broken down and removed after
- 4⇔exercise by taking in more
- 5⇔oxygen by
- 6⇔maintaining an elevated breathing rate
- A high carbohydrate meal, active cool down and an ice bath help speed up ______ after intense exercise.
- 'recovery' ✓
- Match the correct definitions to these key terms.
- lactic acid⇔a by-product of anaerobic respiration that accumulates in muscles ✓
- oxygen debt⇔the amount of extra oxygen required to remove the lactic acid ✓
- lactate accumulation⇔the point where intensity of exercise triggers lactic acid build up ✓
- recovery⇔time required to repair the damage to the body caused by training ✓
- Match the correct benefits to these post exercise strategies.
- an active cool down⇔maintain elevated breathing and heart rates to remove lactic acid ✓
- a carbohydrate meal⇔replenish energy stores in muscles ✓
- drinking water⇔replace fluids lost through sweating ✓
- ice bath⇔reduces inflammation and muscle soreness through cold therapy ✓
- massage⇔speed up recovery by relaxing muscle fibres and removing knots ✓
Worksheet
Presentation
Video
Lesson Details
Key learning points
- Lactic acid is produced when we exercise anaerobically.
- Anaerobic exercise is when the intensity is too high to provide sufficient oxygen for aerobic respiration.
- Anaerobic exercise at high intensity can only last a short duration.
- During recovery respiratory rates remain elevated to remove lactic acid.
Common misconception
Exercise is either aerobic or anaerobic and lactic acid is bad.
All exercise is on a continuum from 100% aerobic (e.g. a long distance walk) to 100% anaerobic (e.g. a 1 rep max powerlifter) and the build up of lactic acid is perfectly natural and necessary to work at high intensity when insufficient O2 available.
Keywords
Lactic acid - a by-product of anaerobic respiration that accumulates in muscles during intense exercise, contributing to muscle fatigue and soreness
Oxygen debt - the amount of extra oxygen required to remove the lactic acid and replace the body's reserves of oxygen
Lactate accumulation - the point at which intensity of exercise triggers a build up of lactic acid in the muscles and blood due to working anaerobically with insufficient oxygen
Recovery - time required to repair the damage to the body caused by training or competition