Long-distance running, bone density, and osteoarthritis
N. E. Lane, D. A. Bloch, H. H. Jones, W. H. Marshall Jr, P. D. Wood and J. F. Fries
Forty-one long-distance runners aged 50 to 72 years were compared with 41
matched community controls to examine associations of repetitive, long-term
physical impact (running) with osteoarthritis and osteoporosis.
Roentgenograms of hands, lateral lumbar spine, and knees were assessed
without knowledge of running status. A computed tomographic scan of the
first lumbar vertebra was performed to quantitate bone mineral content.
Runners, both male and female, have approximately 40% more bone mineral
than matched controls. Female runners, but not male runners, appear to have
somewhat more sclerosis and spur formation in spine and weight-bearing knee
x-ray films, but not in hand x-ray films. There were no differences between
groups in joint space narrowing, crepitation, joint stability, or
symptomatic osteoarthritis. Running is associated with increased bone
mineral but not, in this cross-sectional study, with clinical
osteoarthritis.
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