title: Lack of correlation between 6-month fluctuations in habitual physical activity and testosterone. Concentrations in elderly subjects.
abstract: BACKGROUND
  To examine the influence of long-term modifications in habitual physical activity (PA) on resting total testosterone (TT) concentrations in a group of healthy elderly subjects.
  
  
  METHODS
  
  
  
  METHODS
  6-month prospective study.
  
  
  METHODS
  University research departments of exercise physiology and geriatric medicine.
  
  
  METHODS
  thirty-one independent, community dwelling elderly subjects (16 men and 15 women) aged > 65 who volunteered to participate.
  
  
  METHODS
  correlational study.
  
  
  METHODS
  PA was evaluated by a questionnaire QAPSE (Questionnaire d Activité Physique Saint-Etienne) and expressed by two activity indices: mean habitual daily energy expenditure (MHDEE) and daily energy expenditure corresponding to leisure time sports activities (Sports activity index).
  
  
  RESULTS
  Changes in resting TT concentrations were not related to changes in MHDEE (r = -0.28; p = 0.30 and r = -0.001; p=0.99) and Sports activity (r = -0.30; p = 0.26 and r = -0.05; p = 0.85) in men and women, respectively. Similarly, relative (%) changes in TT were not related to relative changes in MHDEE (r = -0.16; p=0.55 and r = 0.17; p=0.55) and Sports activity (r = -0.11; p=0.68 and r = 0.02; p = 0.92).
  
  
  CONCLUSIONS
  The levels of habitual PA undertaken by an average senior do not appear to affect TT levels in healthy active elderly men and women.
authors.affiliation: Service de Médecine Gériatrique, Centre Hospitalier Lyon-Sud and Centre de Recherche en Nutrition Humaine de Lyon (CNRHL), Lyon, France. bonnefoy@chu-lyon.fr
authors.forename: M
authors.initials: M
authors.lastname: Bonnefoy
authors.forename: T
authors.initials: T
authors.lastname: Kostka
authors.forename: M C
authors.initials: MC
authors.lastname: Patricot
authors.forename: S E
authors.initials: SE
authors.lastname: Berthouze
authors.forename: J R
authors.initials: JR
authors.lastname: Lacour
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D000886:Anthropometry; D004734:Energy Metabolism; D005260:Female; D006801:Humans; D008297:Male; D010809:Physical Fitness / Q000502:physiology*; D011446:Prospective Studies; D013223:Statistics as Topic; D018709:Statistics, Nonparametric; D011795:Surveys and Questionnaires; D013739:Testosterone / Q000097:blood*
chemical_list: D013739:Testosterone