aerobic anaerobic respiration

• does aerobic exercise use oxygen


  yes
• what exercises do aerobic respiration?

  • low to moderate levels of exercise
  • exercises that can be maintained for a long period of time
  • gentle duration exercise (marathon)
• what does normal breathing do?

  supplies the oxygen needed to the working muscles
• equation for aerobic respiration

  glucose + oxygen -> energy + carbon dioxide + water
• what is oxygen used for in aerobic respiration?

  • break down foods like glucose
  • provides energy so can continue exercising
  • produces waste products like C02 and water (doesn't harm exercise)
• does anaerobic respiration use oxygen?


  no
• what exercises do anaerobic respiration?

  • intense exercise
  • only maintained for a short period of time, bursts of exercise. e.g 100m sprint.
  • energy needed during exercise is provided in absence of oxygen
• equation for anaerobic respiration

  glucose -> energy + lactic acid
• what does the absence of oxygen in anaerobic respiration do?


  • no oxygen is used breaks down foods.
  • this is why anaerobic exercise cannot be maintained for more than a minute or so.
• what is oxygen debt?

  excess post exercise 02 consumption
• what is EPOC?


  Excess Post Exercise Oxygen consumption= increased rate of oxygen intake following strenuous activity
• what happens after exercise?

  1. athlete will be breathing heavy- breaking down lactic acid
  2. body takes in more oxygen to repay oxygen debt
  3. occurs due to having to break down glucose without oxygen
  4. recovery
• what are the immediate effects of exercise?

  • heart
  • breathing rate
  • body temp
• the heart


  • heart rate increases
  • heart contracts more powerfully, more blood pumped around body to supply glucose and oxygen
• breathing rate


  • breathing rate and depth increases
  • leads to more gaseous exchange, more 02 in and C02 out
• body temp


  • body temp increases, generates heat and sweat
  • muscles contracting more often
  • skin goes red as blood vessels near surface open to lose heat by radiation
• what are the short term effects of exercise?

  • fatigue- muscles worked hard
  • dizzy and lightheaded- low blood sugar or pressure
  • nausea- over exertion and lack of water. can cause blood flow to be taken away from full stomach
  • pain and stiffness- delayed onset muscle soreness (DOMS), tiny tears in muscle fibres
  • cramps- involuntary muscle contraction caused by fatigue or strain, dehydration
• precautions to avoid effects of exercise?

  • cool down- decrease body temp and remove lactic acid
  • rehydration- replace fluids lost in exercise through sweating
  • ice baths- repairs tears and constricts blood vessels, helps DOMS
  • massage- helps prevent DOMS by encouraging blood flow
• long term affects of exercise?

  • reduced body weight- fat stores used to supply glucose for energy
  • muscle hypertrophy- muscle growth
  • fitness developed- strength
  • muscles, tendons and ligaments- stronger and more stable
  • reduction in resting heart rate- bradycardia