Aerobic and Muscular Fitness

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  • Is the capacity to do work without becoming exhausted.
  • It is the combination of strength, flexibility and endurance.
  • The two types of fitness that are important in exercise are aerobic and muscular fitness.

Aerobic Fitness

  • This is the capacity to take in, transport and use oxygen without tiring.
  • Good aerobic fitness is to be able to do this for longer than 12 minutes.
  • The respiratory and cardiovascular systems are used during aerobic fitness.
  • The function of respiration is to get oxygen from the air to our body cells. The O2 then combines with chemicals from food to release energy (oxygen uptake).
  • Examples of aerobic fitness are swimming, running, walking and cycling.

Muscular Fitness

  • Muscular fitness includes:
    • Maximum strength (the greatest force a muscle can exert in a single contraction, e.g. holding a heavy weight)
    • Dynamic strength (ability for a muscle to contract at speed whist overcoming resistance, e.g. sprinting or cycling)
    • Flexibility (the range of movement possible by the whole body, or part of the body, at a single point e.g. touching toes)
    • Mobility (ability to move with speed, balance and endurance, e.g. )
    • Endurance/stamina (ability to exert power for an extended period without tiring, e.g. cross country running)
  • Energy for muscular fitness comes from either glycogen that has been…


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