exercise

• Aristotle: '"A man falls into ill health as a result of not caring for exercise"'
• Categories of exercise or physical activity

  • Moderate exercise (brisk walking, ballroom dancing, doubles tennis)
  • Vigorous exercise (running, singles tennis, aerobics, jumping rope, jogging)
• Acute exercise


  A single bout of activity, often described in relation to an individual's maximum aerobic power for certain duration
• Chronic exercise

  The accumulation of regular bouts of exercise/training
• Regular exercise with moderate impact

  • Strengthens the immune system

  
• Moderate exercise


  • Can improve the immune system

  
• Maximal exercise

  • Can suppress the immune system, thus increasing the risk of infection

  
• Athletes with high intensity, acute exercise and longer training periods


  • May suffer mild suppression of immune system

  
• Extreme, intense or prolonged exercise

  • Can lead to a short-term immune impairment particularly in cellular immunity