Urinary catecholamine excretion during competition in 11 to 23 year old hockey players.

Stress experienced by young athletes (ages 11 to 23 years) during competition was studied by comparing urinary epinephrine (E) and norepinephrine (NE) excretion at rest, during bicycle exercise (55% max) and during a hockey game. Athletes were divided into four groups: 11, 12, 16, and 23 years olds with four subjects in each group. Urinary production rates were similar between experimental conditions and age groups. Both resting E and NE levels …