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The primary form of energy that is used for muscle contractions
is Adenosine triphosphate (ATP). Within the body there are four sources
from which ATP is created or found. Muscle contractions can not occur
without ATP.
1. ATP yields ADP + P + energy
There is very little available ATP in the body, therefore this source
of ATP is relatively limited.
2. Creatine phosphate yields Creatine + Phosphate
+ Energy
Creatine phosphate (CP) is used to phosphoralate ADP to form ATP.
CP acts as a phosphate donor.
3. Glucose yields 2 Pyruvic acid + 2 ATP (energy)
This is the anaerobic process of Glycolysis.
4. Pyruvic Acid yields O2 + CO2+ H2O+ 36ATP(energy)
+ Heat
This process is aerobic therefore it requires sufficient oxygen levels.
Prolonged work can be done if O2 is present.
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