Aerobic And Anerobic Exercise (PAPER 1) Flashcards
where does energy come from?
Energy comes from food, like carbohydrates which are converted to GLUCOSE.
what is oxygen vital for
OXYGEN is vital for aerobic energy production.
Production of energy with oxygen is called:
Aerobic respiration (glucose + oxygen → carbon dioxide + water + energy)
Production of energy without oxygen is called:
Anaerobic respiration (glucose → carbon dioxide + lactic acid + energy
Aerobic Exercise
Exercise at a low to moderate intensity and/or long duration e.g. marathon running
This exercise is steady enough for the heart to supply all the working muscles with the oxygen they need to produce energy aerobically.
process of aerobic exercise:
Glucose (from carbohydrates), fatty acids (from fat) and oxygen are brought via the blood to the working muscles.
The by-products (or waste products) = carbon dioxide and water.
H2O is removed via sweat and breathing out (exhalation) water vapour.
CO2 is absorbed by the blood and taken away to the heart and THEN taken to the lungs to be removed during exhalation.
Any exercise that increases your heart rate to a certain level – around 60-80% Max HR – is aerobic exercise.
Anaerobic Exercise
Exercise at a high intensity for a low duration e.g 100m sprint, is anaerobic exercise.
Your muscles need lots of energy for this type of exercise, but your body cannot deliver enough oxygen to them fast enough!
This means that energy production has to anaerobic instead.
Anaerobic Energy Production
The Anaerobic equation is:
glucose → carbon dioxide + lactic acid + energy
Lactic acid can cause problems when we exercise!
After a while it makes your muscles ache. They get fatigued and do not work as efficiently.
Higher work rate =»» Quicker Build Up of lactic acid.
Approximately maximum of 60 seconds anaerobic exercise before you feel the effects.
