caa a22 4500 469055480 CHVBK 20180323132842.0 cr unu---uuuuu 170328e19920701xx s 000 0 eng 10.1007/BF00636228 doi (NATIONALLICENCE)springer-10.1007/BF00636228 Hormonal adaptations and modelled responses in elite weightlifters during 6 weeks of training [Elektronische Daten] [T. Busso, K. Häkkinen, A. Pakarinen, H. Kauhanen, P. Komi, J. Lacour] Summary: The concentrations of serum testosterone, sex-hormone-binding-globulin (SHBG) and luteinizing hormone (LH) were examined throughout 1-year of training in six elite weightlifters. A systems model, providing an estimation of fatigue and fitness, was applied to records of training volume and performance levels in clean and jerk. The analysis focused on a 6-week training period during which blood samples were taken at 2-week intervals. A 4-week period of intensive training (period I) could be distinguished from the following 2-week period of reduced training (period II). During period I, decreases in serum testosterone (P<0.05) and increases in serum LH concentrations (P<0.01) were observed; a significant correlation (r=0.90,P<0.05) was also observed between the changes in serum LH concentration and in estimated fitness. The magnitude of LH response was not related to the change in serum androgens. On the other hand, the change in testosterone: SHBG ratio during period II was significantly correlated (r=0.97,P<0.01) to the LH variations during period I. These finding suggested that the LH response indicated that the decrease in testosterone concentration was not primarily due to a dysfunction of the hypothalamic-pituitary system control, and that the fatigue/fitness status of an athlete could have influenced the LH response to the decreased testosterone concentration. The negative effect of training on hormonal balance could have been amplified by its influence on the hypothalamic-pituitary axis. A decrease in physiological stress would thus have been necessary for the completion of the effect of LH release on androgenic activity. Springer-Verlag, 1992 Strength training nationallicence Systems model nationallicence Fatigue nationallicence Fitness nationallicence Serum hormones nationallicence Busso T. Laboratoire de Physiologie - GIP Exercice, Faculté de Médecine Saint-Etienne, F-42023, Saint-Etienne Cedex 2, France aut Häkkinen K. Department of Biology of Physical Activity, University of Jyväskylä, SF-40100, Jyväskylä, Finland aut Pakarinen A. Department of Clinical Chemistry, University of Oulu, SF-90220, Oulu, Finland aut Kauhanen H. Department of Biology of Physical Activity, University of Jyväskylä, SF-40100, Jyväskylä, Finland aut Komi P. Department of Biology of Physical Activity, University of Jyväskylä, SF-40100, Jyväskylä, Finland aut Lacour J. Laboratoire de Physiologie - GIP Exercice, Faculté de Médecine Lyon-Sud, F-69921, Oullins Cedex, France aut European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 64/4(1992-07-01), 381-386 0301-5548 64:4<381 1992 64 421 https://doi.org/10.1007/BF00636228 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00636228 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Busso T. Laboratoire de Physiologie - GIP Exercice, Faculté de Médecine Saint-Etienne, F-42023, Saint-Etienne Cedex 2, France aut NATIONALLICENCE 700 1- Häkkinen K. Department of Biology of Physical Activity, University of Jyväskylä, SF-40100, Jyväskylä, Finland aut NATIONALLICENCE 700 1- Pakarinen A. Department of Clinical Chemistry, University of Oulu, SF-90220, Oulu, Finland aut NATIONALLICENCE 700 1- Kauhanen H. Department of Biology of Physical Activity, University of Jyväskylä, SF-40100, Jyväskylä, Finland aut NATIONALLICENCE 700 1- Komi P. Department of Biology of Physical Activity, University of Jyväskylä, SF-40100, Jyväskylä, Finland aut NATIONALLICENCE 700 1- Lacour J. Laboratoire de Physiologie - GIP Exercice, Faculté de Médecine Lyon-Sud, F-69921, Oullins Cedex, France aut NATIONALLICENCE 773 0- European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 64/4(1992-07-01), 381-386 0301-5548 64:4<381 1992 64 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer