Abstract
BackgroundExposure to higher magnitude vertical impacts is thought to benefit bone health. The correlates of this high-impact physical activity (PA) in later life are unknown.MethodsParticipants were from the Cohort for Skeletal Health in Bristol and Avon, Hertfordshire Cohort Study and MRC National Survey of Health and Development. Associations of demographic, behavioural, physiological and psychological factors with vertical acceleration peaks ≥1.5 g (i.e. high-impact PA) from 7-day hip-worn accelerometer recordings were examined using linear regression.ResultsA total of 1187 participants (mean age = 72.7 years, 66.6% females) were included. Age, sex, education, active transport, self-reported higher impact PA, walking speed and self-rated health were independently associated with high-impact PA whereas BMI and sleep quality showed borderline independent associations. For example, differences in log-high-impact counts were 0.50 (P < 0.001) for men versus women and −0.56 (P < 0.001) for worst versus best self-rated health. Our final model explained 23% of between-participant variance in high impacts. Other correlates were not associated with high-impact activity after adjustment.ConclusionsBesides age and sex, several factors were associated with higher impact PA in later life. Our findings help identify characteristics of older people that might benefit from interventions designed to promote osteogenic PA.
Highlights
Exposure to higher magnitude vertical impacts is thought to benefit bone health
Our findings help identify characteristics of older people that might benefit from interventions designed to promote osteogenic physical activity (PA)
We showed that walking speed and self-reported higher impact PA were related to accelerometer-measured higher impact PA among older adults from the general population,[19] and that older age and worse physical performance were related to lower levels of high-impact PA among older adults attending an aerobics class.[13]
Summary
Exposure to higher magnitude vertical impacts is thought to benefit bone health. The correlates of this high-impact physical activity (PA) in later life are unknown. Consultant Senior Lecturer Charlotte Moss, Research Assistant Mark H. Consultant Rheumatologist Elaine Dennison, Professor of Musculoskeletal Epidemiology Tim Gaysin, Research Assistant Diana Kuh, Professor of Life Course Epidemiology Andrew Wong, NSHD Study Manager Kenneth R.
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