Linear and nonlinear associations between physical activity, body composition, and multimorbidity over 10 years among community-dwelling older adults

Balogun, Saliu A, Aitken, Dawn, Wu, Feitong, Scott, David, Jones, Graeme and Winzenberg, Tania 2021, Linear and nonlinear associations between physical activity, body composition, and multimorbidity over 10 years among community-dwelling older adults, Journals of gerontology: series A, pp. 1-6, doi: 10.1093/gerona/glab086.

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Title Linear and nonlinear associations between physical activity, body composition, and multimorbidity over 10 years among community-dwelling older adults
Author(s) Balogun, Saliu A
Aitken, Dawn
Wu, Feitong
Scott, DavidORCID iD for Scott, David orcid.org/0000-0001-5226-1972
Jones, Graeme
Winzenberg, Tania
Journal name Journals of gerontology: series A
Start page 1
End page 6
Total pages 6
Publisher Oxford University Press
Place of publication Oxford, Eng.
Publication date 2021-03-29
ISSN 1079-5006
1758-535X
Keyword(s) body composition
dynapenia
physical activity
sarcopenia
Summary Background This study aims to describe the relationships between physical activity (PA), body composition, and multimorbidity over 10 years. Method Participants (N = 373; 49% women; average age 61.3 ± 6.7 years) were followed for 10 years. Multimorbidity was defined by self-report as the presence of 2 or more of 12 listed chronic conditions. PA (steps per day) at baseline was assessed by pedometer, handgrip strength (HGS) by dynamometer, and appendicular lean mass (ALM) and total body fat mass by dual-energy x-ray absorptiometry. Relative HGS and ALM were calculated by dividing each body mass index (BMI). Regression cubic splines were used to assess evidence for a nonlinear relationship. Results After 10 years, 45% participants had multimorbidity. There was a nonlinear relationship between PA and multimorbidity—PA was associated with lower multimorbidity risk among individuals who engaged in <10 000 steps/d (relative risk [RR] = 0.91, 95% CI: 0.85, 0.97, per 1 000 steps/d), but not among those who participated in ≥10 000 steps/d (RR = 1.04, 95% CI: 0.93, 1.09, per 1 000 steps/d). Higher BMI (RR = 1.05, 95% CI: 1.02, 1.08, per kg/m2) and fat mass (RR = 1.03, 95% CI: 1.01, 1.04, per kg), and lower relative HGS (RR = 0.85, 95% CI: 0.77, 0.94, per 0.1 psi/kg/m2) and ALM (RR = 0.93, 95% CI: 0.88, 0.98, per 0.1 kg/kg/m2) were linearly associated with a higher risk of multimorbidity. Absolute HGS and ALM were not significantly associated with multimorbidity. Discussion These findings highlight the potential clinical importance of maintaining adequate levels of PA and of reducing adiposity and maintaining muscle function for minimizing the risk of multimorbidity in older adults.
Notes In Press article
Language eng
DOI 10.1093/gerona/glab086
Indigenous content off
Field of Research 1103 Clinical Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30149696

Document type: Journal Article
Collections: Faculty of Health
School of Exercise and Nutrition Sciences
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