<P> Excess post-exercise oxygen consumption (EPOC, informally called afterburn) is a measurably increased rate of oxygen intake following strenuous activity . In historical contexts the term "oxygen debt" was popularized to explain or perhaps attempt to quantify anaerobic energy expenditure, particularly as regards lactic acid / lactate metabolism; in fact, the term "oxygen debt" is still widely used to this day . However, direct and indirect calorimeter experiments have definitively disproven any association of lactate metabolism as causal to an elevated oxygen uptake . </P> <P> In recovery, oxygen (EPOC) is used in the processes that restore the body to a resting state and adapt it to the exercise just performed . These include: hormone balancing, replenishment of fuel stores, cellular repair, innervation and anabolism . Post-exercise oxygen consumption replenishes the phosphagen system . New ATP is synthesized and some of this ATP donates phosphate groups to creatine until ATP and creatine levels are back to resting state levels again . Another use of EPOC is to fuel the body's increased metabolism from the increase in body temperature which occurs during exercise . </P> <P> EPOC is accompanied by an elevated consumption of fuel . In response to exercise, fat stores are broken down and free fatty acids (FFA) are released into the blood stream . In recovery, the direct oxidation of free fatty acids as fuel and the energy consuming re-conversion of FFAs back into fat stores both take place . </P>

What is the purpose of epoc (excess postexercise oxygen consumption)
find me the text answering this question