title: Relationships between field fitness test and basal serum testosterone and cortisol levels in soccer players.
abstract: The aim of this study was to investigate the existence of a relationship between performance capacities and blood levels of testosterone (T) and cortisol (C). Thirty-two professional soccer players volunteered for the study. Morning levels of hormones were plotted against results of maximal vertical jump with a preparatory counter-movement (CMJ), 30 m running, and Cooper's 12-min running test. The serum T was positively related to both CMJ and average running speed (r=0.43 and r=0.47, respectively). Serum levels of C and T were in negative correlation (r= -0.40 and r= -0.49, respectively) with the results of Cooper's test. It was concluded that athletes with better explosive strength and sprint running performances have a higher basal level of testosterone. The results suggest a relationship between testosterone production and development of fast twitch muscle fibres in athletes.
authors: School of Specialization in Sport Medicine, University G D'Annunzio Chieti, Italy.
authors: C
authors: C
authors: Bosco
authors: J
authors: J
authors: Tihanyi
authors: A
authors: A
authors: Viru
mesh_terms: D000328:Adult; D000332:Aerobiosis / Q000502:physiology; D006801:Humans; D006854:Hydrocortisone / Q000097:blood*; D008297:Male; D010807:Physical Endurance / Q000502:physiology; D010809:Physical Fitness; D012420:Running / Q000502:physiology; D012916:Soccer; D013739:Testosterone / Q000097:blood*
chemical_list: D013739:Testosterone; D006854:Hydrocortisone