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- 2. Learning objectives © Boardworks Ltd 2006 of 33 Learning objectives The three muscle types and their
- 3. Muscle classification Muscles are involved in every movement in your body. This includes the beating of
- 4. Voluntary The type of muscle responsible for moving your arms and legs is called voluntary muscle.
- 5. Involuntary Involuntary muscle is found in and around organs such as the intestines, and around blood
- 6. Cardiac muscle Cardiac muscle is a special type of muscle that forms the walls of the
- 7. Muscles types All three types of muscle are important in physical activity: Voluntary muscle enables movement.
- 9. More about voluntary muscles Sport is mostly concerned with the 650 or so voluntary muscles (sometimes
- 11. Voluntary muscles (rear)
- 12. Voluntary muscles
- 13. Understanding muscle action Muscles are attached to bones by tendons. Muscles are arranged in antagonistic pairs.
- 14. Upper arm muscles The biceps and triceps work together as an antagonistic pair to move the
- 15. Quadriceps / hamstring muscle action The quadriceps and hamstrings in the legs are another antagonistic pair.
- 16. Voluntary muscles
- 17. Muscle twitch fibres Muscles are made up of cells or fibres. It is these fibres that
- 18. Muscle twitch fibres Muscle twitch fibres occur in different proportions in different people. This proportion is
- 19. Muscle strength Strength means the maximum force that muscles can exert when they contract. There are
- 20. Muscle strength
- 21. Isotonic contractions The different types of strength are related to the different types of muscular contractions.
- 22. Isometric contractions Isometric contractions do not create movement – the muscle neither shortens nor lengthens. Isometric
- 23. Strength training The strength of muscles can be increased through training. Strength training makes muscles grow
- 24. Muscle endurance training Muscular endurance means the ability of muscles to repeatedly contract without getting tired.
- 25. Muscle training
- 26. Muscle training – everyday tasks Improving muscle strength and endurance through training can make everyday tasks
- 27. Muscle training – rehabilitation Strength training can also assist recovery after an injury. Light weights are
- 28. Muscle tone and posture Muscles almost never fully relax – even when you sleep, there are
- 29. Posture If you have good posture… But if you have poor posture… Your internal organs, like
- 30. Muscle quiz
- 31. Exam-style questions 1. This picture shows part of the muscular system. Name muscles a–e. a b
- 32. Exam-style questions 2. Explain what is meant by an antagonistic pair and give one example. Muscular
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