GCSE PE Revision (8)
- Created by: Sam Groves
- Created on: 04-04-11 19:28
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CV Endurance
- The CV system involves transporting oxygen round the body, and it includes the heart, the blood vessels, and the blood itself.
- The benefits of a healthy, balanced lifestyle for the CV system include:
- healthy capillaries, and through exercise, an increase in capillary density and efficiency.
- a healthy heart that is less likely to suffer from heart disease, and eventually a lower resting heart rate.
- good blood circulation; with exercise this can increase the amount of blood pumped during exercise and at rest.
- healthy blood pressure.
- feeling energetic because of the uptake of oxygen by the body
- feeling less tired both physically and mentally
- Muscular endurance
- This is the ability of a muscle or group of muscles to repeatedly contract or keep going without rest.
- With a healthy balanced lifestyle, muscles can keep going longer because of greater aerobic potential.
- Activities like running can enlarge slow twitch fibres enhancing potential for energy production.
- Onset of fatigue is delayed because of higher maximum oxygen uptake.
- Muscles are also healthier, and the size and number of mitochondria are increased through exercise.
- There is also an increase in the myoglobin content within each muscle cell.
- There is also cardiac hypertrophy and an increase in the size of the fast twitch muscles.
- Speed
- The ability of the body to move quickly.It is important to be able to move quickly as part of a healthy active lifestyle.
- With a healthy balanced lifestyle, your speed is affected because:
- your heart and lungs are…
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