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Slide 2

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Only be
· Athletes
replenish
can seek
ed when
to extend
exercise
time they
is stopped
can use
· Only1mol this
e of ATP · Anaerobic
system
system
can be
Can use
· therefore
recycled
PC
· through creatine
doesn't
1
resynthes suppleme
need
mole of
is is only ntation
oxygen
PC
possible · No
in the fatiguing
presence
· Only by-
of oxygen ATP is
· products
limited
resynthes
reducing
supply of
ised
recovery
Phosphoc
quickly.
time
reatine
· PC stores
· Only lasts
are
for up to
recovered
10
quickly.
seconds
Disadvantages Advantages…read more

Slide 3

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The Lactic Acid System
Most activities last longer than 10 seconds therefore must find another energy
to resythesis ATP
The body switches to GLYCOGEN ...
It is then broken down
Glycogen is converted Energy is then released Due to no oxygen the
into pyruvate by the
into glucose-6- to facilitate ATP pyruvate is changed into
enzyme PFKThis process
phosphate resythesis lactic acid
is called GLYCOSIS…read more

Slide 4

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Left over
lactic acid
· Can cause can be
muscular used as a
pain and metabolic
fatigue fuel by
easily if
unfit reconversi
through on into
build up of pyruvate
Only a
· lactic small
acid and enter
amount of · Anaerobic
the aerobic
process so
energy can system
be released doesn't
from need to
glycogen wait for
without the oxygen to
Accumulate
· presence of
d lactic acid be present
oxygen
means it
stops · ATP can be
energy resynthesi
production sed
and relatively
intensity quickly
needs to be
stopped or
reduced
Disadvantages Advantages…read more

Slide 5

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The Aerobic System
When there is a supply of
oxygen glycogen is first
converted to glucose-6-
phosphate
There are 2 key stages, the
It is broken down into
Krebs Cycle and Electron
pyruvate
transport system
This is then converted into
The energy release sigh t
acetyl-coenzyme- A by
moves to the mitochondria
PDH…read more

Slide 6

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Krebs Cycle and the Electron Transport
System
2 ATP
Glycogen
Glucose-6-phosphate
Insufficient O2
Acetyl-coenzyme-A Lactic Acid
Pyruvic Acid
Electron Transport
System
Citric acid H
H + e-
2 ATP H + e-
34
O2 ATP
CO2 H20…read more

Slide 7

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