Associations between sedentary time, physical activity and bone health among older people using compositional data analysis

Irene Rodríguez-Gómez, Asier Mañas, José Losa-Reyna, Leocadio Rodríguez-Mañas, Sebastien F. M. Chastin, Luis M. Alegre, Francisco J. García-García, Ignacio Ara

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Abstract

Introduction Aging is associated with a progressive decrease in bone mass (BM), and being physical active is one of the main strategies to combat this continuous loss. Nonetheless, because daily time is limited, time spent on each movement behavior is co-dependent. The aim of this study was to determine the relationship between BM and movement behaviors in elderly people using compositional data analysis. Methods We analyzed 871 older people [395 men (76.9±5.3y) and 476 women (76.7±4.7y)]. Time spent in sedentary behavior (SB), light physical activity (LPA) and moderate-to-vigorous physical activity (MVPA), was assessed using accelerometry. BM was determined by bone densitometry (DXA). The sample was divided according to sex and bone health indicators. Results The combined effect of all movement behaviors (PA and SB) was significantly associated with whole body, leg and femoral region BM in the whole sample (p=0.05), with leg and pelvic BM (p
Original languageEnglish
Pages (from-to)e0206013
JournalPLoS ONE
Volume13
Issue number10
DOIs
Publication statusPublished - 22 Oct 2018

Keywords

  • sedentary time
  • physical activity
  • bone health
  • older people

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