eCite Digital Repository
Pedometer determined ambulatory activity and bone mass: a population-based longitudinal study in older adults
Citation
Foley, S and Quinn, S and Jones, G, Pedometer determined ambulatory activity and bone mass: a population-based longitudinal study in older adults, Osteoporosis International, 21, (11) pp. 1809-1816. ISSN 0937-941X (2009) [Refereed Article]
DOI: doi:10.1007/s00198-009-1137-1
Abstract
In this large population-based study, walking was
assessed twice yearly for a week, each time by pedometer,
had consistent clinically important associations with hip
areal bone mineral density (aBMD) in both sexes which
appears most important in those over 65 years of age
suggesting that walking becomes more important with
increasing age.
Introduction Walking is advocated as a preventative strategy
for osteoporosis but the evidence is conflicting in females and
lacking in males. The aim of this population-based longitudinal
study in community dwelling older people (n=875) was to
determine the association between pedometer determined
ambulatory activity (PAA) and bone mass.
Methods Bone mass was assessed as aBMD at the hip and
spine using dual X-ray absorptiometry. Steps per day were
measured using pedometers for 1 week on four occasions at
least 6 months apart. Data were analysed using linear mixed
models.
Results At baseline, PAAwas positively associated with hip
aBMD. An age interaction was present with steps having a
stronger association for those aged over 65 years. Longitudinally,
the effect of steps on hip aBMD was constant, but
not additive over time. For those over 65 years, the
difference in hip aBMD between the lowest and highest
steps quartiles ranged from 3.1% to 9.4%. With regard to
the spine, the relationship between daily steps and spine
aBMD was modified by sex. For males; there was no
significant relationship between steps and spine aBMD.
However, for females, higher steps were associated with
higher spine aBMD with the effect being constant over time
but not additive. There was no evidence of a threshold
effect.
Conclusion In conclusion, pedometer-determined ambulatory
activity has consistent clinically important associations
with hip aBMD in both sexes which appears most
important in those over 65 years of age. The associations
for spine aBMD were both weaker and inconsistent
suggesting site specificity.
Item Details
Item Type: | Refereed Article |
---|---|
Keywords: | Dual X-ray absorptiometry; Elderly; Pedometers |
Research Division: | Biomedical and Clinical Sciences |
Research Group: | Clinical sciences |
Research Field: | Rheumatology and arthritis |
Objective Division: | Health |
Objective Group: | Clinical health |
Objective Field: | Clinical health not elsewhere classified |
UTAS Author: | Foley, S (Ms Stella Foley) |
UTAS Author: | Quinn, S (Dr Stephen Quinn) |
UTAS Author: | Jones, G (Professor Graeme Jones) |
ID Code: | 60693 |
Year Published: | 2009 |
Web of Science® Times Cited: | 19 |
Deposited By: | Menzies Institute for Medical Research |
Deposited On: | 2010-02-16 |
Last Modified: | 2017-04-26 |
Downloads: | 0 |
Repository Staff Only: item control page