AEROBIC AND ANAEROBIC ENERGY SYSTEMS

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AEROBIC AND ANAEROBICENERGY SYSTEMS

• DIFFERENCES BETWEEN THE TWO

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AEROBIC FITNESS

• ATTAINABLE THROUGH LOW INTENSITY TRAINING AND IS
  NEEDED FOR ENDURANCE AND RECOVERY FROM THE
  REMOVAL OF LACTIC ACID. IT PROVIDES A GOOD
  FOUNDATION FOR REACHING HIGHER LEVELS OF TRAINING.

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ANAEROBIC FITNESS

• INVOLVES HIGHER INTESITY TRAINING AND IS NEEDED
  FOR SHORT, EXPLOSIVE BURSTS OF ACTIVITY. IT
  REQUIRES A GOOD FOUNDATION OF AEROBIC FITNESS.

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Training the energy systems

• Most sports are a mixture of aerobic and
  anaerobic work. You may use all out effort
  during a tennis volley(anaerobic) then slow down
  again(aerobic). Training makes both energy
  systems work better. But the training is
  different for each. So, you must study your
  sport to see how much of each system you use.
  Then decide the best mix of training.

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How the energy systems work aerobic respiration

• Is the release of energy from the breakdown of
  glucose..by combining it with oxygen in the
  living cells.

CO2 WATER ENERGY
GLUCOSE O2
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AEROBIC RESPIRATION
GLUCOSE AND OXYGEN These are brought to the
respiring cells by the bloodstream.
Carbon dioxide Is taken to the lungs, and
breathed out.
Energy Is used for muscle contraction, metabolism
and maintaining temperature
Water Passes into the blood and is lost as sweat,
moist breath and urine.
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Facts about aerobic respiration

• This is a very efficient method of producing
  energy, and 1 molecule of glucose can provide
  TWENTY TIMES as much energy as anaerobic
  respiration.
• It occurs during normal day to day activity and
  accounts for our energy production up to about
  60 of maximum effort.
• The drawback is that it doesnt produce energy
  very quickly-only about 1/3 as quickly as
  anaerobic.

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Energy supplied steadily
ENERGY
glucose
O2
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ANAEROBIC RESPIRATION

• Is the release of a little bit of energy, VERY
  QUICKLY, from the incomplete breakdown of glucose
  in the ABSENCE OF OXYGEN.
• This happens when the muscles need to work so
  hard that.
• .the lungs and bloodstream cant deliver enough
  oxygen to respire the available glucose
  aerobically.

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The Equation
glucose
lactic acid little energy
GLUCOSE From the bloodstream and GYCOGEN in the
muscles
LACTIC ACID Accumulates in the muscles making
them feel tired and rubbery.
A BIT OF ENERGY But produced quickly and used for
explosive activity.
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OXYGEN DEBT

• Because the glucose can only be partly broken
  down in the absence of oxygen
• .lactic acid is produced together with a much
  smaller amount of energy.
• Build up of lactic acid causes acute fatigue and
  results in OXYGEN DEBT
• .which must be repaid by continued deep
  breathing after exercise.

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Energy supplied explosively
glucose
energy
lactic acid
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Facts about anaerobic respiration

• Anaerobic respiration is an inefficient process
  since it produces only 1/20th as much energy as
  aerobic respiration.
• However, it produces energy three times faster
  and so it is used during high intensity
  (explosive) activity over a short period.
• After a relatively short time, (1min/1 ½) the
  build up of lactic acid affects the performance
  of the muscles and an OXYGEN DEBT occurs.

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Aerobic and Anaerobic training

• Aerobic training should
• Be strenuous, rhythmical and prolonged.
• Be between 60-85 of maximum heart rate.
• Use large muscle groups.

• Anaerobic training should.
• Be very strenuous in short bursts.
• Be around or close to 85 of maximum heart rate.
• Include rest and recovery periods.
• Be undertaken with caution.

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Fitness demands of different activities
weight lifting
cross-country skier
hockey
rugby
200m
anaerobic
100
100
aerobic
1500m
downhill skiing
100m sprint
tennis
marathon runner
football
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Training methods
50
anaerobic
100
100
aerobic
circuits
weight
interval
continuous
fartlek
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Heart rate training zones