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The present study aimed to investigate the effects of age and habitual PA level on Pmax and VO2max.<\/jats:p>\n               <jats:p>Thirty-nine young men (YM, 22.1\u2005\u00b1\u20053.4 years), 34 old men (OM, 71.7\u2005\u00b1\u20054.1 years), and 23 very old men (VOM, 85.8\u2005\u00b1\u20052.7 years) performed an incremental test to determine VO2max and a force\u2013velocity profile to assess Pmax, maximal force (F0) and maximal velocity (V0). The threshold of 10\u2005000 steps per day (SPD) was used to dichotomize participants into high-PA and low-PA groups.<\/jats:p>\n               <jats:p>Compared with YM, Pmax decreased by 40% and 64% in OM and VOM, respectively, whereas VO2max decreased by 29% and 51% (all p\u2005&amp;lt;\u2005.001). Compared with YM, F0 declined by 29% and 52% in OM and VOM, respectively, whereas V0 decreased by 17% and 28% (all p\u2005&amp;lt;\u2005.01). VO2max, but not Pmax, was greater in high-PA versus low-PA. In VOM, SPD was related to VO2max (r\u2005=\u20050.79; p\u2005&amp;lt;\u2005.001) and F0 (r\u2005=\u20050.51; p\u2005&amp;lt;\u2005.05), and VO2max was positively correlated with F0 (r\u2005=\u20050.72; p\u2005&amp;lt;\u2005.01).<\/jats:p>\n               <jats:p>The decline in Pmax, mainly mediated by the loss of force, was greater than the decrease in VO2max. Whereas PA was associated with higher level of VO2max, it does not appear to have an effect on Pmax. The relationships between SPD, VO2max and F0 suggest that above 80 years, a greater strength allows to achieve a greater amount of SPD, ultimately improving VO2max.<\/jats:p>","DOI":"10.1093\/gerona\/glaf048","type":"journal-article","created":{"date-parts":[[2025,3,4]],"date-time":"2025-03-04T19:24:55Z","timestamp":1741116295000},"source":"Crossref","is-referenced-by-count":2,"title":["Are Maximal Power and Maximal Aerobic Capacity in Older and Very Old Adults Dependent on their Level of Physical Activity?"],"prefix":"10.1093","volume":"80","author":[{"given":"Eric","family":"Luneau","sequence":"first","affiliation":[{"name":"Universit\u00e9 Jean Monnet Saint-Etienne, Universit\u00e9 Savoie Mont-Blanc, Laboratoire Interuniversitaire de Biologie de la Motricit\u00e9 , Saint-Etienne ,","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vianney","family":"Rozand","sequence":"additional","affiliation":[{"name":"Universit\u00e9 Jean Monnet Saint-Etienne, Universit\u00e9 Savoie Mont-Blanc, Laboratoire Interuniversitaire de Biologie de la Motricit\u00e9 , Saint-Etienne ,","place":["France"]},{"name":"INSERM UMR1093-CAPS, Universit\u00e9 Bourgogne Franche-Comt\u00e9, UFR des Sciences du Sport , Dijon ,","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guillaume Y","family":"Millet","sequence":"additional","affiliation":[{"name":"Universit\u00e9 Jean Monnet Saint-Etienne, Universit\u00e9 Savoie Mont-Blanc, Laboratoire Interuniversitaire de Biologie de la Motricit\u00e9 , Saint-Etienne ,","place":["France"]},{"name":"Institut Universitaire de France (IUF) , Paris ,","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2025,3,4]]},"reference":[{"issue":"9","key":"2025072807464841200_CIT0001","doi-asserted-by":"publisher","first-page":"1311","DOI":"10.1007\/s40279-016-0489-x","article-title":"Ageing, muscle power and physical function: a 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