The Relation between Exercise Duration and Intensity on Phosphocreatine (PCr) Level: an Article Review
Keywords:Exercise duration, Exercise intensity, PCr, Phosphocreatine
Exercise is a physical activity that planned, structured, and sustainable. Exercise has 4 criteria, that is
frequency, intensity, type, and duration. During exercise, phosphocreatine (PCr) depletion increases, and
early intracellular acidosis has occurred. These changes contribute to a decrease in training capacity in
terms of training duration. This literature review aimed to determine the relationship between the intensity
and duration of exercise with the concentration of PCr and recovery factors. The literature study has carried
out by selecting an Experiment research design. The results of the review showed that PCr was the largest
energy contributor in the first 10 seconds of exercise in the heavy-intensity exercise where phosphocreatine
triggers energy without oxygen or anaerobic. The recovery of PCr influenced by a person’s health condition
and age. The concentration of PCr in children was higher than in adults because of the relatively high rate
of oxidative ATP formation. It proved that there was a significant relationship between PCr and the duration
and intensity of exercise.
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