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Med Sci Sports Exerc. 2000 Aug;32(8):1373-7.

Total and regional bone density in male runners, cyclists, and controls.

Author information

  • 1Fitness Assessment and Sports Injury Centre, The University of Edinburgh, United Kingdom. a.d.stewart@abdn.ac.uk

Abstract

PURPOSE:

Male athletes who were runners (N = 12), cyclists (N = 14), or both (N = 13) were compared with nonexercising age-matched controls (N = 23) for total and regional bone mineral density (BMD). All athletic subjects had competed for a minimum of 3 yr and trained for a minimum of 4 h x wk(-1). Runners undertook no cycling and cyclists undertook no running training.

METHODS:

All subjects were scanned for whole body and L1-L4 spine BMD using a Hologic QDR 1000W scanner (Hologic Inc., Bedford, MA).

RESULTS:

There were no differences in age, height, weight, body mass index (BMI), % fat, or hours of training between any of the athletic groups (P > 0.05), although compared with controls, runners and cyclists had lower body mass index (P < 0.01) and all athletic groups had lower % fat (P < 0.001). Compared with controls, runners had greater total and leg BMD (P < 0.05), cyclists had reduced spine BMD (P = 0.05), and athletes of the "both" group had greater total (P < 0.05) and arm BMD (P < 0.01).

CONCLUSION:

Running is associated with increased bone density, particularly in the leg, whereas cycling is associated with a mild decrease in bone density in the spine. In athletes who do both, running exerts a stronger influence than cycling.

PMID:
10949001
[PubMed - indexed for MEDLINE]
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