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Rivista di Medicina dello Sport

Official Journal of the Italian Sports Medicine Federation
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Medicina dello Sport 2004 June;57(2):115-20

lingua: Inglese

Exercise-­induced tes­tos­te­rone, growth hor­mone and cor­ti­sol respons­es at the ­first ­three stag­es of sex­u­al mat­u­ra­tion in ­boys

Viru A., Karelson K., Kuusler K., Janson T., Viru M.

Institute of Exercise Biology, University of Tartu, Tartu, Estonia


Aim. The pur­pose of the ­study was to inves­ti­gate wheth­er the sex­u­al mat­u­ra­tion influ­enc­es tes­tos­te­rone, cor­ti­sol and ­growth hor­mone respons­es dur­ing 20-min ergo­met­ric aero­bic exer­cise in ­boys.
Methods. The sub­jects ­were 19 ­healthy ­boys ­aged 10 to 13 ­years at the ­first experi­men­tal ­trials. After a ­year 15 ­boys and ­after two ­years 7 ­boys ­were retest­ed ­again. In ­venous ­blood ser­um tes­tos­te­rone, cor­ti­sol and ­growth hor­mone con­cen­tra­tions ser­um ­were deter­mined ­before and ­after 20-min ergom­e­ter exer­cise. These ­results ­were com­pared ­with ­those ­obtained in 50 ­adults (­mean age 22.5±3.5 ­years).
Results. The sex­u­al mat­u­ra­tion ­effect on tes­tos­te­rone ­basal lev­el did not coin­cide ­with sig­nif­i­cant dif­fer­enc­es in cor­ti­sol and ­growth hor­mone pre-exer­cise lev­els ­between sex­u­al mat­u­ra­tion stag­es 1, 2 and 3 (mat­u­ra­tion stag­es ­were eval­u­at­ed by the ­basal tes­tos­te­rone lev­el) ­although in ­boys the lev­els of tes­tos­te­rone and cor­ti­sol ­were low­er and ­growth hor­mone high­er ­than in ­adults.
Conclusions. The ­post-exer­cise tes­tos­te­rone lev­el ­increased ­with sex­u­al mat­u­ra­tion, but tes­tos­te­rone ­response (dif­fer­ence ­between pre- and ­post-exer­cise con­cen­tra­tions) was not sig­nif­i­cant at the ­first ­three stag­es of sex­u­al mat­u­ra­tion. Significant cor­ti­sol ­response ­appeared at ­stage 2. Growth hor­mone respons­es ­were sig­nif­i­cant in all ­three stag­es of mat­u­ra­tion. According to MANO­VA sex­u­al mat­u­ra­tion but not chron­o­log­i­cal age or ­height had sig­nif­i­cant ­effect on hor­mone respons­es dur­ing exer­cise at ­first ­three stag­es of sex­u­al mat­u­ra­tion.

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