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Sports Science

Sports Science. 5.5 Recovery after exercise. Learning objectives. Be able to define and describe aerobic and anaerobic respiration Understand how blood glucose levels are controlled. Anaerobic respiration. Releases energy from glucose without using oxygen

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Sports Science

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  1. Sports Science 5.5 Recovery after exercise

  2. Learning objectives • Be able to define and describe aerobic and anaerobic respiration • Understand how blood glucose levels are controlled

  3. Anaerobic respiration • Releases energy from glucose without using oxygen • Strenuous sport – oxygen not supplied quick enough • By-product lactic acid – makes your muscles ache

  4. Oxygen Debt • Lungs and heart couldn’t keep up – Anaer. Resp. • Lactic acid needs to be removed • Broken down into carbon dioxide and water • Needs oxygen • Muscles don’t work properly until: • Removed lactic acid (20 min) • Replaced energy (20 min) • Top up haemoglobin (24 hrs) • Replenish glycogen (24 hrs)

  5. Repaying debt • Warming down – keeps your heart rate and breathing rate up • ‘Active recovery’ • Repays oxygen debt – removing lactic acid • Lactic acid stays in your blood if you don’t ward down

  6. Glycogen • Glucose cannot be stored as glucose • Converted to starch called glycogen • Stored in Liver (20%) and muscles (80%) • Blood sugar controlled by 2 hormones produced by liver • Insulin and glucagon • Diabetics – can’t produce insulin • Dangerously high blood sugar

  7. Too much Digesting carbohydrates Increase blood glucose Stimulate pancreas to produce insulin Liver converts glucose into glycogen Stored energy Too little Exercise/respiration Reduces blood glucose Stimulates pancreas to produce glucagon Liver converts glycogen to glucose Released energy Controlling blood glucose

  8. Key points • Your body cannot store glucose in your blood. Instead you store it as starch, called glycogen, in your liver (20%) and your muscles (80%) • The hormones insulin and glucagon control your blood sugar levels

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