Any muscle contraction involves metabolic processes that are necessary. As muscles contract harder, more and more Adenosine triphosphate is lost and needs to be replenished for the muscle to continue contracting.
Adenosine triphosphate (ATP) is an organic substance that supplies energy for a variety of functions in living cells , including muscular contraction, nerve impulse transmission, condensate dissolving, and chemical synthesis. The "molecular unit of currency" of intracellular energy transfer, ATP is a substance that is present in all known forms of life. When ingested through metabolic processes, it either transforms into adenosine monophosphate (AMP) or adenosine diphosphate (ADP) (AMP). Some other procedures renew ATP. Each day, the human body recycles an amount of ATP equal to its own body weight. It functions as a coenzyme and is a precursor to DNA and RNA.
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