(HealthDay News) — Lower levels of physical capability are associated with increased mortality, and daily activity is inversely associated with disability in those with or at risk of knee osteoarthritis, according to two studies published online April 29 in BMJ.
Rachel Cooper, PhD, from University College London, and colleagues examined correlations between objective measures of physical capability (grip strength, chair rise speed, and standing balance time) at age 53 and all-cause mortality in 1,355 men and 1,411 women. The researchers found that mortality rates were higher for participants unable to perform each of the three tests or those performing in the lowest versus the highest fifth. The rates of death were considerably higher for those who could not perform any of the three tests (hazard ratio, 8.40), compared with those who could perform all tests.
Dorothy D. Dunlop, PhD, from the Northwestern University Feinberg School of Medicine in Chicago, and colleagues examined the correlation between light intensity physical activity and incident disability in 1,680 community-dwelling adults, aged ≥49 years, with or with risk factors for knee osteoarthritis. The correlation with disability progression was assessed in 1,814 adults. The researchers observed a significant inverse correlation between time spent in light intensity activities and incident disability. Increasing quartiles of daily time spent in light intensity physical activities correlated with less incident disability and less disability progression, after adjustment for socioeconomic and health factors.
“An increase in daily physical activity time may reduce the risk of disability, even if the intensity of that additional activity is not increased,” Dunlop and colleagues write.
The Dunlop study was partially funded by pharmaceutical companies.