Abstract
Ouabain (OUA) is a cardiotonic glycoside protein known to inhibit Na + / K +-ATPase. It is also considered an endogenous hormone and it is produced in hypothalamus and in adrenal gland, but little is known about its physiological role. However, it has been demonstrated the involvement of the OAU in the acute stress response, where physical exercise is capable of increasing its levels in r…