Association between physical activity levels and physiological factors underlying mobility in young, middle-aged and older individuals living in a city district.

Maintaining adequate levels of physical activity is known to preserve health status and functional independence as individuals grow older. However, the relationship between determinants of physical activity (volume and intensity) and physiological factors underlying mobility (cardio-respiratory fitn...

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Autores principales:	Luca Laudani, Giuseppe Vannozzi, Zimi Sawacha, Ugo della Croce, Andrea Cereatti, Andrea Macaluso
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c7cfbc11535e4ba7ab330bb2923ff0a6
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spelling	oai:doaj.org-article:c7cfbc11535e4ba7ab330bb2923ff0a62021-11-18T08:56:28ZAssociation between physical activity levels and physiological factors underlying mobility in young, middle-aged and older individuals living in a city district.1932-620310.1371/journal.pone.0074227https://doaj.org/article/c7cfbc11535e4ba7ab330bb2923ff0a62013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24040209/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Maintaining adequate levels of physical activity is known to preserve health status and functional independence as individuals grow older. However, the relationship between determinants of physical activity (volume and intensity) and physiological factors underlying mobility (cardio-respiratory fitness, neuromuscular function and functional abilities) is still unclear. The aim of this study was to investigate the association between objectively quantified physical activity and a spectrum of physiological factors underlying mobility in young, middle-aged and older individuals living in a city district. Experiments were carried out on 24 young (28 ± 2 years), 24 middle-aged (48 ± 2 years) and 24 older (70 ± 3 years) gender-matched volunteers. Physical activity was monitored by a wearable activity monitor to quantify volume and intensity of overall physical activity and selected habitual activities over 24 hours. Ventilatory threshold was assessed during an incremental cycling test. Torque, muscle fiber conduction velocity and agonist-antagonist coactivation were measured during maximal voluntary contraction of knee extensors and flexors. Ground reaction forces were measured during sit-to-stand and counter-movement jump. K-means cluster analysis was used to classify the participants' physical activity levels based on parameters of volume and intensity. Two clusters of physical activity volume (i.e., high and low volume) and three clusters of physical activity intensity (i.e. high, medium and low intensity) were identified in all participants. Cardio-respiratory fitness was associated with volume of overall physical activity as well as lying, sitting, standing, walking and stair climbing. On the other hand, neuromuscular function and functional abilities showed a significant association with intensity of overall physical activity as well as postural transition, walking and stair climbing. As a practical application, the relative role played by volume and intensity of overall physical activity and selected habitual activities should be taken into account in the design of preventative training interventions to preserve mobility as individuals grow older.Luca LaudaniGiuseppe VannozziZimi SawachaUgo della CroceAndrea CereattiAndrea MacalusoPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 9, p e74227 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Luca Laudani Giuseppe Vannozzi Zimi Sawacha Ugo della Croce Andrea Cereatti Andrea Macaluso Association between physical activity levels and physiological factors underlying mobility in young, middle-aged and older individuals living in a city district.
description	Maintaining adequate levels of physical activity is known to preserve health status and functional independence as individuals grow older. However, the relationship between determinants of physical activity (volume and intensity) and physiological factors underlying mobility (cardio-respiratory fitness, neuromuscular function and functional abilities) is still unclear. The aim of this study was to investigate the association between objectively quantified physical activity and a spectrum of physiological factors underlying mobility in young, middle-aged and older individuals living in a city district. Experiments were carried out on 24 young (28 ± 2 years), 24 middle-aged (48 ± 2 years) and 24 older (70 ± 3 years) gender-matched volunteers. Physical activity was monitored by a wearable activity monitor to quantify volume and intensity of overall physical activity and selected habitual activities over 24 hours. Ventilatory threshold was assessed during an incremental cycling test. Torque, muscle fiber conduction velocity and agonist-antagonist coactivation were measured during maximal voluntary contraction of knee extensors and flexors. Ground reaction forces were measured during sit-to-stand and counter-movement jump. K-means cluster analysis was used to classify the participants' physical activity levels based on parameters of volume and intensity. Two clusters of physical activity volume (i.e., high and low volume) and three clusters of physical activity intensity (i.e. high, medium and low intensity) were identified in all participants. Cardio-respiratory fitness was associated with volume of overall physical activity as well as lying, sitting, standing, walking and stair climbing. On the other hand, neuromuscular function and functional abilities showed a significant association with intensity of overall physical activity as well as postural transition, walking and stair climbing. As a practical application, the relative role played by volume and intensity of overall physical activity and selected habitual activities should be taken into account in the design of preventative training interventions to preserve mobility as individuals grow older.
format	article
author	Luca Laudani Giuseppe Vannozzi Zimi Sawacha Ugo della Croce Andrea Cereatti Andrea Macaluso
author_facet	Luca Laudani Giuseppe Vannozzi Zimi Sawacha Ugo della Croce Andrea Cereatti Andrea Macaluso
author_sort	Luca Laudani
title	Association between physical activity levels and physiological factors underlying mobility in young, middle-aged and older individuals living in a city district.
title_short	Association between physical activity levels and physiological factors underlying mobility in young, middle-aged and older individuals living in a city district.
title_full	Association between physical activity levels and physiological factors underlying mobility in young, middle-aged and older individuals living in a city district.
title_fullStr	Association between physical activity levels and physiological factors underlying mobility in young, middle-aged and older individuals living in a city district.
title_full_unstemmed	Association between physical activity levels and physiological factors underlying mobility in young, middle-aged and older individuals living in a city district.
title_sort	association between physical activity levels and physiological factors underlying mobility in young, middle-aged and older individuals living in a city district.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/c7cfbc11535e4ba7ab330bb2923ff0a6
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Association between physical activity levels and physiological factors underlying mobility in young, middle-aged and older individuals living in a city district.

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