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Young women who exercise regularly and
use birth control pills may not get a boost in bone strength
seen in women who exercise and do not use oral contraceptives.
The study found that regular resistance
training and aerobic exercise strengthened bones in women
aged 18 to 31 over a 2-year period. However, oral contraceptives
appeared to prevent the build-up of bone in the spine that
was seen in women who exercised.
The findings
suggest that women who exercise and take birth control pills
may be compromising their chances of attaining peak bone mass
at key sites of the body.
Medicine &
Science in Sports & Exercise 2001;33:873-880
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