Physiological Adaptations in Response to Aerobic Training

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Physiological Adaptations in Response to Aerobic Training

Resting Heart Rate

  • Trained athlete: lower resting heart rate, stable maximal heart rate and faster recovery
  • A 10 week training program could see a reduction from 72>60

Stroke Volume

  • Long term endurance training sees a substantial increase because the rained left ventricle fills more quickly in the relaxation stage
  • Training results in more blood being in circulation

Cardiac Output

  • Increases due to increased stroke volume (a difference of 15-20L/min >>> 20-25L/min)

Oxygen Uptake(VO2)

  • The best indicator of cardiorespiratory endurance, measure the max amount of oxygen muscles can absorb
  • Estimated by: 12-minute run, beep test
  • Training increases VO2 max

Lung Capacity

  • Definition: the amount of air the lungs can hold
  • Vital capacity (amount of air expelled after maximum inspiration) increases slightly post exercise
  • Tidal volume (amount of air breathed in and out during normal inspiration) is stable at resting + sub maximal, increases at maximal

Haemoglobin Levels

  • Haemoglobin: bonds to O2 and transports it around the body
  • Levels increase with training (esp at high altitudes) as there is more plasma and red blood cells

Blood Pressure

  • Definition: the pressure that the blood exerts against the inner walls of the arteries
  • Training slightly decreases blood pressure

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