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Walking Economy and Preferred Speed in Old and Very Old Men.
Luneau, Eric; Rozand, Vianney; Rimaud, Diana; Foschia, Clément; Millet, Guillaume Y.
Afiliación
  • Luneau E; Université Jean Monnet Saint-Etienne, Lyon 1, Université Savoie Mont-Blanc, Laboratoire Interuniversitaire de Biologie de la Motricité, Saint-Etienne, FRANCE.
  • Rimaud D; Service de médecine physique et de réadaptation, Hôpital Universitaire de Saint-Etienne, Saint-Etienne, FRANCE.
  • Foschia C; Service de Physiologie Clinique et de l'Exercice, Hôpital Universitaire de Saint-Etienne, Saint-Etienne, France.
Med Sci Sports Exerc ; 2024 Sep 17.
Article en En | MEDLINE | ID: mdl-39285590
ABSTRACT

PURPOSE:

With aging, the decline in preferred walking speed (PWS), influenced by the increased energy cost of walking (CoW), is a key predictor of morbidity. However, the determinants associated with PWS and CoW remain poorly understood, especially after 80 years old. The aim of the study was to characterize the amplitude and mechanisms of age-related decline in CoW and PWS in old (OM) and very old (VOM) men.

METHODS:

Thirty-nine young men (YM, 22.1 ± 3.4 years), 34 OM (71.7 ± 4.1 years) and 23 VOM (85.8 ± 2.7 years) performed aerobic, neuromuscular, and gait assessments. Net CoW was measured on a treadmill. Physical activity (PA) was evaluated by questionnaire and accelerometry.

RESULTS:

Net CoW was 32% (p < 0.001), 19% (p < 0.01), 26% (p < 0.001) higher in VOM compared to OM for 1.11, 1.67 m.s-1 and PWS. Net CoW was also 27% (p < 0.001), 26% (p < 0.01), and 29% (p < 0.001) higher in OM compared to YM at these speeds. Linear regression stratified by age showed that net CoW at PWS was associated to step frequency (r = 0.79; p < 0.001) for OM and to both CV of stride mean time (r = 0.48; p < 0.05) and maximal strength of knee extensors (r = -0.54; p < 0.05) for VOM. The same analysis revealed that PWS was correlated with net CoW (r = -0.56; p < 0.05) and PA (r = 0.47; p < 0.05) in VOM.

CONCLUSIONS:

The progressive increase in net CoW with age was associated with gait and neuromuscular impairments, particularly after the age of 80. This increase in net CoW was related to a decrease in PWS in VOM, suggesting an adaptation of PWS to compensate for the increase in energy demand. Maintaining a high level of PA may potentially delay the age-related decline in PWS despite an age-related increase in net CoW.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Med Sci Sports Exerc Año: 2024 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Med Sci Sports Exerc Año: 2024 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Estados Unidos