EPINEPHRINE PREWORKOUT ELEVATION MAY OFFSET EARLY MORNING MELATONIN CONCENTRATIONS TO MAINTAIN MAXIMAL MUSCULAR FORCE AND POWER IN TRACK ATHLETES.

The article reports on research which was conducted to investigate the relationship between physical performance, epinephrine, and melatonin concentrations in the early morning and late afternoon in elite collegiate male track and field athletes. Researchers evaluated several jumpers and sprinters. They found that a preworkout elevation of epinephrine may offset concentrations of melatonin in the morning and help track athletes maintain maximum muscle force and power and that quickness and power were worse in athletes in the morning.