PE Muscle Fibre Types IGCSE Ch1 T6 P 30-32

Muscle (a)   are the basic building blocks of the muscle.

Muscle fibres contract when a message from the (a)   tells them to and this enables them to move.

There are muscle fibres that are good for endurance whilst others work best in short bursts of strength exercises.

• True

• False

Some people naturally have more of one type of muscle fibre than the other, partly as a result of ...............

• genetics

• diet

• training

What are the two main types of muscle fibre?

• Cartilage

  Collagen

• Fast twitch

  Slow twitch

• Isotonic

  Isometric

These muscles use oxygen to fire up, they take longer to get going, but can work for longer periods without getting tired.

• Fast twitch muscle fibre

• Slow twitch muscle fibre

These muscles are thicker and quicker to contract but wear out more quickly.

• Fast twitch muscle fibre

• Slow twitch muscle fibre

Which muscle fibre is more powerful and lower in endurance?

• Fast twitch muscle fibre

• Slow twitch muscle fibre

Fast twitch muscle fibres are activated when the body nears maximum exertion.

• True

• False

Which of the following best describes slow twitch muscle fibres?

• Contracts quickly

  Produces a large amount of force

  Low fatigue tolerance

  Good strength and power

• Contracts slowly

  Produces little force

  Higher fatigue tolerance

  Good for endurance