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Osteoporosis International

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Open Access 01-07-2010 | Original Article

Is there a U-shaped association between physical activity and falling in older persons?

Authors: G. M. E. E. Peeters, N. M. van Schoor, S. M. F. Pluijm, D. J. H. Deeg, P. Lips

Published in: Osteoporosis International | Issue 7/2010

Abstract

Summary

This study tests whether the relationship between physical activity and (recurrent) falling is U-shaped. Among 1,337 community-dwelling older persons, no evidence for a nonlinear association was found. If all older persons increase their physical activity level with 100 units, 4% may be prevented to become recurrent fallers.

Introduction

Previous studies suggest a U-shaped relationship between physical activity and falling. This study tests this hypothesis and examines whether this relationship is modified by level of physical functioning.

Methods

Community-dwelling persons (65+) from the Longitudinal Aging Study Amsterdam (LASA) were prospectively followed on falls for 3 years after baseline assessment in 1995/1996 (n = 1,337). Outcome measures were time to first fall and time to recurrent falling. The LASA Physical Activity Questionnaire was used to calculate physical activity in minutes per day weighted for intensity (range 0–2000). Physical functioning was measured with physical performance tests and self reported functional limitations. Confounders were age, sex, body mass index, chronic diseases, psychotropic medication, cognitive functioning, depressive symptoms, and fear of falling.

Results

No evidence for a nonlinear association was found (p for physical activity² > 0.20). No significant association was found between physical activity and time to first fall. An increase in physical activity of 100 units led to a 4% decrease in risk of recurrent falling (adjusted hazard ratio 0.96, 95% confidence interval 0.92, 0.99). No interactions with physical performance or functional limitations were found (p > 0.50).

Conclusions

The hypothesized U-shaped relationship between physical activity and falling could not be confirmed. At higher levels of physical activity, the risk of recurrent falling decreased, while no association was found with fall risk.

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Title: Is there a U-shaped association between physical activity and falling in older persons?
Authors: G. M. E. E. Peeters
N. M. van Schoor
S. M. F. Pluijm
D. J. H. Deeg
P. Lips
Publication date: 01-07-2010
Publisher: Springer-Verlag
Published in: Osteoporosis International / Issue 7/2010
Print ISSN: 0937-941X
Electronic ISSN: 1433-2965
DOI: https://doi.org/10.1007/s00198-009-1053-4

At a glance: The STEP trials

Springer Medicine

Is there a U-shaped association between physical activity and falling in older persons?

Abstract

Summary

Introduction

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Summary

Introduction

Methods

Results

Conclusions

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