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Lack of correlation between 6-month fluctuations in habitual physical activity and testosterone. Concentrations in
M Bonnefoy1, T Kostka, M C Patricot
1Service de Médecine Gériatrique, Centre Hospitalier Lyon-Sud and Centre de Recherche en Nutrition Humaine de Lyon (CNRHL), Lyon, France. bonnefoy@chu-lyon.fr
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.
Experimental Design:
6-month prospective study.
Setting:
University research departments of exercise physiology and geriatric medicine.
Participants:
thirty-one independent, community dwelling elderly subjects (16 men and 15 women) aged > 65 who volunteered to participate.
Interventions:
correlational study.
Measures:
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.