title: Using testosterone and cortisol as biomarker for training individualization in elite basketball: a 4-year follow-up study.
abstract: The purpose of this study was to determine the responses of testosterone and cortisol, with special reference to playing positions, playing time (PT), and phase of the season. We performed a follow-up study during 4 consecutive seasons to investigate the effects of PT, positional role, and phase of the season on anabolic-catabolic biomarkers (plasma total testosterone -TT- and cortisol -C-) on 20 professional male basketball players (27.0 ± 4.2 years; 24.4 ± 1.2 kg·m). First blood samples were collected right after the off-season period and considered as baseline. Samples were taken periodically every 4-6 weeks, always after a 24- to 36-hour break after the last game played. Statistical procedures were nonparametric mainly. Hormonal status was playing position-dependent, power forward (PF) showed the lowest TT values (median ± interquartile range [IQR]; PF: 18.1 ± 4.9; nmol·L), and small forwards showed the highest ones of cortisol (0.55 ± 0.118 μmol·L). Players who played between 13 and 25 minutes per game showed the highest values of TT (22.8 ± 6.9 nmol·L) and TT/C (47.1 ± 21.2). March and April showed the most catabolic or stressed hormonal state (low TT/C values and high ones of cortisol) and that is necessary to take into account according to PT (>25-minute per game) and specific playing position. Monitoring plasma TT and cortisol is recommended to prevent excessive stress caused by professional basketball season requirements.
authors.affiliation: 1Bàsquet Manresa SAD, Manresa, Spain; 2University of Basque Country, Vitoria, Spain; 3National Institute of Physical Education of Catalonia (INEFC), Lleida, Spain; and 4University of Oviedo, Oviedo, Spain.
authors.forename: Xavi
authors.initials: X
authors.lastname: Schelling
authors.forename: Julio
authors.initials: J
authors.lastname: Calleja-González
authors.forename: Lorena
authors.initials: L
authors.lastname: Torres-Ronda
authors.forename: Nicolás
authors.initials: N
authors.lastname: Terrados
mesh_terms: D000293:Adolescent; D000328:Adult; D001490:Basketball / Q000502:physiology*; D015415:Biomarkers / Q000097:blood; D005500:Follow-Up Studies; D006801:Humans; D006854:Hydrocortisone / Q000097:blood*; D008297:Male; D012621:Seasons; D013312:Stress, Physiological / Q000502:physiology*; D013739:Testosterone / Q000097:blood*; D055815:Young Adult
chemical_list: D015415:Biomarkers; D013739:Testosterone; D006854:Hydrocortisone