In
general, activities that involve influences with the earth, such as jumping and
running, are the most useful way to improve bone health, according to Dr. Jon
Tobias, a professor of rheumatology at the University of Bristol.
They originate ground-reaction forces that move through your
bones and stimulate them to “remodel” themselves and add density, he said.
They also entail strong muscular contractions that tug at
and slightly bend attached bones, redoubling the stimulating effects of the
exercise.
Hopping and sprinting are the most obvious and well-studied
examples of high-impact exercises. Interestingly, weight training on its own
seems to be only a moderately effective way to enhance bone density.
Fortunately for those of us reluctant to take up speed
skating or hurdling later in life, the amount of pounding required to stimulate
bone remodeling in older people is likely less than it is for the young.
Walking may be sufficient, if it is speedy.
So-called odd impacts, created when you move in a direction
other than straight ahead, can initiate remodeling throughout the hipbone and
spine in older people, a few recent studies suggest. So, too, may shake up the
bones by standing on a whole-body vibration platform, available nowadays at
many health clubs.
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