Habitual physical activity and peak anaerobic power in elderly women |
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| Authors: | Tomasz Kostka Marc Bonnefoy Laurent M Arsac Sophie E Berthouze Alain Belli and Jean-René Lacour |
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| Institution: | (1) Service de Médecine Gériatrique, Centre Hospitalier Lyon-Sud, F-69495 Pierre-Bénite Cedex, Lyon, France, FR;(2) Department of Preventive Medicine, Medical University, Lodz, Poland, PL;(3) Départment de Rééducation et Réadaptation Fonctionnelles – GIP Exercice, Faculté de Médecine, Université Jean Monnet, Saint-Etienne, France, FR;(4) Laboratoire de Physiologie – GIP Exercice, Faculté de Médecine de Lyon-Sud, Lyon, France, FR |
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| Abstract: | The aim of this study was to investigate the relationship between maximal anaerobic power (P
max) and corresponding optimal velocity (V
opt) and habitual physical activity (PA) on the one hand and with maximal oxygen consumption (V˙O2max) on the other hand, in elderly women. Twenty-nine community dwelling, healthy women aged 66–82 years participated in the
study. PA was evaluated using the Questionnaire d'Activite Physique Saint-Etienne (QAPSE) and expressed using two QAPSE activity
indices: mean habitual daily energy expenditure (MHDEE) and daily energy expenditure corresponding to leisure time sports
activities (sports activity). The subjects' P
max and V
opt were measured while they cycled on a friction-loaded non-isokinetic cycle ergometer. P
max was expressed relative to body mass P
max/kg(W · kg−1)], and relative to the mass of two quadriceps muscles P
max
/Quadr(W·kgQuadr
−1)]. A negative relationship between P
max/kg (Spearman's r = −0.56; P < 0.01), P
max/Quadr (r = −0.53; P < 0.01) and V
opt (r = −0.45; P < 0.05) and age was found. P
max/kg was positively associated with MHDEE (r = 0.51; P < 0.01) and sports activity (r = 0.58; P < 0.01), as were P
max/Quadr and V
opt (r = 0.55; P < 0.01 and r = 0.54; P < 0.01, respectively). P
max/kg, P
max/Quadr and V
opt correlated positively with V˙O2max. The positive relationship between ergometer measurements and PA indices was similar to that between V˙O2max and PA. P
max/kg was, moreover, closely related to V
opt (r = 0.77; P < 0.001). When a multiple stepwise regression analysis was used to select the variables influencing ergometer measurements,
MHDEE contributed significantly to P
max/kg variance, whereas sports activity contributed to P
max/Quadr and V
opt variances. In conclusion, the data from this cross-sectional study suggest that in healthy elderly women habitual PA, and
especially leisure time PA, alleviates the decline of the P
max of the quadriceps muscles.
Accepted: 30 January 1997 |
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| Keywords: | Exercise Training Cycle ergometer Maximal power Optimal velocity |
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