title: Sex effect on catecholamine responses to sprint exercise in adolescents and adults.
abstract: The purpose of this study was to clarify the effect of sex on plasma catecholamine responses to sprint exercise in adolescents and adults. Thirty-six untrained participants took part in this study-9 girls and 10 boys (Tanner Stage 4) and 9 women and 8 men. Each participant performed a 6-s sprint test on a cycle ergometer. Plasma adrenaline (A) and noradrenaline (NA) concentrations were determined successively at rest (A0 and NA0), immediately after the 6-s sprint test (AEX and NAEX), and after 5 min of recovery (A5 and NA5). Peak power, expressed in absolute values or relative to body weight and fat-free mass, was significantly higher in boys than in girls and higher in men than in women (p < .001). No sex effect was observed in AEX in the adolescents, but the NA increase was significantly higher in boys in response to the 6-s sprint (p < .05). In adults, no sex difference was found in NAEX, but AEX was significantly higher in men than in women (p < .05). NAEX was significantly higher in women than in girls (p < .05), and AEX was significantly higher in men than in boys (p < .01). The results of this study suggest that male and female adolescents and young adults might exhibit different catecholamine responses to sprint exercise.
authors.affiliation: Laboratory of Physiology and Biomechanics of Muscular Exercise, University of Rennes, France.
authors.forename: Maïtel
authors.initials: M
authors.lastname: Botcazou
authors.forename: Christophe
authors.initials: C
authors.lastname: Jacob
authors.forename: Arlette
authors.initials: A
authors.lastname: Gratas-Delamarche
authors.forename: Sophie
authors.initials: S
authors.lastname: Vincent
authors.forename: Danièle
authors.initials: D
authors.lastname: Bentué-Ferrer
authors.forename: Paul
authors.initials: P
authors.lastname: Delamarche
authors.forename: Hassane
authors.initials: H
authors.lastname: Zouhal
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D004837:Epinephrine / Q000097:blood / Q000378:metabolism*; D015444:Exercise / Q000502:physiology*; D005260:Female; D005498:Follicular Phase / Q000502:physiology; D006801:Humans; D008297:Male; D009638:Norepinephrine / Q000097:blood / Q000378:metabolism*; D012420:Running / Q000502:physiology*; D012737:Sex Factors
chemical_list: D009638:Norepinephrine; D004837:Epinephrine