The energy for muscle contraction comes from the hydrolysis of ATP.
Energy is generated for the contraction of muscles and other body activities through the hydrolysis of adenosine triphosphate (ATP) molecules.
ATP is the energy currency of all biological systems. For muscle contractions, the ATP molecule is hydrolyzed during cross-bridge cycling. This leads to the conversion of the chemical energy in ATP to mechanical energy.
The mechanical energy is stored in muscle tissues and utilized in carrying out work during muscle contractions.
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