Effects of endurance exercise on free testosterone concentration and the binding affinity of sex hormone binding globulin (SHBG)

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Title translated into German:Auswirkungen von Ausdauerbelastung auf die Konzentration des freien Testosterons und die Bindungsaffinitaet des sexualhormonbindenden Globulins
Author:Fahrner, C.L.; Hackney, A.C.
Published in:International journal of sports medicine
Published:19 (1998), 1 , S. 12-15, Lit.
Format: Publications (Database SPOLIT)
Publication Type: Journal article
Media type: Print resource
Language:English
ISSN:0172-4622, 1439-3964
Keywords:
man
Online Access:
Identification number:PU199802209847
Source:BISp
id PU199802209847
bisp-collection db
format Literatur
last_indexed 2009-04-27T15:20:13Z
first_indexed 2001-07-24T13:39:12Z
publication_source BISp
subformat Zeitschriftenartikel
hierarchy_top_id JO00000000664
hierarchy_parent_id JOI199891400000664
hierarchy_top_title International journal of sports medicine
hierarchy_parent_title International journal of sports medicine, 1998, 1
is_hierarchy_id PU199802209847
is_hierarchy_title Effects of endurance exercise on free testosterone concentration and the binding affinity of sex hormone binding globulin (SHBG)
hierarchy_sequence 0012
recordtype bisparticle
publishDate 1998
publishDate_facet 1998
language eng
title Effects of endurance exercise on free testosterone concentration and the binding affinity of sex hormone binding globulin (SHBG)
spellingShingle Effects of endurance exercise on free testosterone concentration and the binding affinity of sex hormone binding globulin (SHBG)
Ausdauerbelastung
Belastung, körperliche
Endokrinium
Globulin, hormonbindendes
Hormonkonzentration
Hormonproduktion
Mann
Noradrenalin
Sportmedizin
Sympathikotonus
Testosteron
title_sort effects of endurance exercise on free testosterone concentration and the binding affinity of sex hormone binding globulin shbg
title_short Effects of endurance exercise on free testosterone concentration and the binding affinity of sex hormone binding globulin (SHBG)
title_alt Auswirkungen von Ausdauerbelastung auf die Konzentration des freien Testosterons und die Bindungsaffinitaet des sexualhormonbindenden Globulins
title_alt_lang deu
media_type Gedruckte Ressource
city Stuttgart
abstract Our purpose was to examine the changes in free testosterone concentration following moderately prolonged endurance exercise to determine whether such changes were due to alterations in the binding affinity of sex hormone binding globulin (SHBG). Ten trained men completed control (45 min rest) and exercise (45 min, 70% VO2max) experimental sessions. Blood samples were collected before (pre-) and immediately after (post-) each of the sessions and analyzed for total testosterone, free testosterone, LH, FSH, cortisol, estradiol, SHBG, epinephrine and norepinephrine. The association constant (Ka) of SHBG for testosterone was assessed to evaluate binding affinity. No significant difference was seen between the pre-control and the pre-exercise session values for any of the measures. However, within the exercise session significant (p<0.01) increases in post samples were evident for total testosterone (+32.0%), free-testosterone (+39.6%), cortisol (+38.0%), norepinephrine (+365.2%) and epinephrine (+225.8%). All other hormonal changes and the responses for Ka were non-significant. The results of the correlation analysis indicated that only norepinephrine was significantly (p<0.05) related to the changes observed in free testosterone (r=+0.92). We conclude that the free testosterone increase with moderate, prolonged endurance exercise was not associated with the change in the binding affinity of SHBG. Furthermore, the data suggest that the exercise-induced increase in testosterone involves increased production which may be mediated by sympathetic stimulation of the testicles. Verf.-Referat
abstract_lang eng
abstract_type author
author2 Fahrner, C.L.
Hackney, A.C.
author_facet Fahrner, C.L.
Hackney, A.C.
author2-role Autor
Autor
author_author_facet Fahrner, C.L.
Hackney, A.C.
spelling Fahrner, C.L.
Hackney, A.C.


0172-4622
1439-3964
603122-5
IJSMD
Ausdauerbelastung
Belastung, körperliche
Endokrinium
Globulin, hormonbindendes
Hormonkonzentration
Hormonproduktion
Mann
Noradrenalin
Sportmedizin
Sympathikotonus
Testosteron
endocrinium
endurance load
hormone-binding globulin
hormone concentration
hormone production
man
noradrenaline
physical load
sports medicine
sympathetic tone
testosterone
Belastung, langdauernde
Dauerbelastung
Steady-state-Belastung
Belastung
Hormonspiegel
Anstrengung
Belastung, physische
Männerklasse
Medizin
Geschichte der Medizin
Untersuchung, sportmedizinische
Wasserdampf
endurance exercise
physical workload
physical strain
physical exercise
physical work
physical stress
endocrine system
Effects of endurance exercise on free testosterone concentration and the binding affinity of sex hormone binding globulin (SHBG)
PU199802209847
199802209847
issn 0172-4622
1439-3964
zdb 603122-5
coden IJSMD
topic Ausdauerbelastung
Belastung, körperliche
Endokrinium
Globulin, hormonbindendes
Hormonkonzentration
Hormonproduktion
Mann
Noradrenalin
Sportmedizin
Sympathikotonus
Testosteron
topic_facet Ausdauerbelastung
Belastung, körperliche
Endokrinium
Globulin, hormonbindendes
Hormonkonzentration
Hormonproduktion
Mann
Noradrenalin
Sportmedizin
Sympathikotonus
Testosteron
topic_en endocrinium
endurance load
hormone-binding globulin
hormone concentration
hormone production
man
noradrenaline
physical load
sports medicine
sympathetic tone
testosterone
topic_en_facet endocrinium
endurance load
hormone-binding globulin
hormone concentration
hormone production
man
noradrenaline
physical load
sports medicine
sympathetic tone
testosterone
synonym Belastung, langdauernde
Dauerbelastung
Steady-state-Belastung
Belastung
Hormonspiegel
Anstrengung
Belastung, physische
Männerklasse
Medizin
Geschichte der Medizin
Untersuchung, sportmedizinische
Wasserdampf
synonym_en endurance exercise
physical workload
physical strain
physical exercise
physical work
physical stress
endocrine system
journal_facet International journal of sports medicine
container_title International journal of sports medicine
container_volume 19
container_issue 1
container_start_page S. 12-15
has_references 1
institution BISp
journal_fac JO00000000664
journal_year 1998
journal_issue 1
_version_ 1655184253145579520
score 13,23493