how does muscles got tired and create cramps?
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High concentrations of potassium (K+) also causes the muscle cells to decrease in efficiency, causing cramping and fatigue. Potassium builds up in the t-tubule system and around the muscle fiber as a result of action potentials. The shift in K+ changes the membrane potential around the muscle fiber.
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For endurance athletes, the two most important factors contributing to muscle cramps are muscle fatigue and inadequate stretching, according to a new theory. Some experts disagree, adding that dehydration or electrolyte imbalance are also contributing factors.
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