The Anaerobic Energy Systems 7
(ETC) increased lactic acid production.
· The above due to both lack of O 2 and the
recruitment of fast twitch fibres.
· Lactic acid lactate diffuses into blood
for buffering and rapid removal.
Lactic Acid as an Energy Source
· Lactic acid allows high rates of ATP
production for short duration (2-3 minutes).
· As exercise intensity slows or during
recovery sufficient O2 available again
NAD scavenges H+ from lactate and takes
it to the ETC lactate reconverts to
pyruvate to join oxidative system.
Cont...
· Lactate helps the dissociation of O 2 from
haemoglobin
· At higher intensities of exercise lactate
production outstrips the cell's removal
capacity, thus accumulation occurs.
Cont...
· Endurance trained: lower blood lactate
concentrations than untrained individuals
at both the same relative and absolute
intensity.
Due to either a delay in the onset of lactate
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