barbingermany on 2009-11-17
So we know this
This link has been bookmarked by 41 people . It was first bookmarked on 11 Nov 2009, by T Cook.
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17 Nov 09
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Then came a raft of unexpected findings, some showing that competitive swimmers had lower-than-anticipated bone density, others that, as an earlier Phys Ed column pointed out, competitive cyclists sometimes had fragile bones and, finally, some studies suggesting, to the surprise of many researchers, that weight lifting did not necessarily strengthen bones much. In one representative study from a few years ago, researchers found no significant differences in the spine or neck-bone densities of young women who did resistance-style exercise training (not heavy weight lifting) and a similar group who did not.
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Surprisingly, brisk walking has been found to be effective at increasing bone density in older women, Dr. Barry says. But it must be truly brisk. “The faster the pace,” he says — and presumably the greater the bending within the bones — the lower the risk that a person will fracture a bone.
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here seems to be a plateau, however, that has also surprised and confounded some researchers. Too much endurance exercise, it appears, may reduce bone density. In one small study completed by Dr. Barry and his colleagues, competitive cyclists lost bone density over the course of a long training season. Dr. Barry says that it’s possible, but not yet proved, that exercise that is too prolonged or intense may lead to excessive calcium loss through sweat.
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In the meantime, the current state-of-the-science message about exercise and bone building may be that, silly as it sounds, the best exercise is to simply jump up and down, for as long as the downstairs neighbor will tolerate.
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f hopping seems an undignified exercise regimen
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It tends to aid in balance,
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16 Nov 09
Tom MurphyIn the meantime, the current state-of-the-science message about exercise and bone building may be that, silly as it sounds, the best exercise is to simply jump up and down, for as long as the downstairs neighbor will tolerate.
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15 Nov 09
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C. DavisResearchers readily admit that they don't fully understand why some exercise is good for bones and some just isn't.
health bones exercise fitness bone.density best.exercise IMPORTANT
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14 Nov 09
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the study found that the 12-month mortality rate associated with the injury still hovers at more than 20 percent,
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about one in five people over age 65 will die.
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that weight lifting did not necessarily strengthen bones much
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Researchers readily admit that they don’t fully understand why some exercise is good for bones and some just isn’t.
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Until fairly recently, many thought that the pounding or impact that you get from running, for instance, deformed the bone slightly
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But many scientists now think that that process doesn’t apply to bones.
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during certain types of exercise, the bone bends, but this doesn’t stretch cells; it squeezes fluids from one part of the bone matrix to another. The extra fluid inspires the cells bathed with it to respond by adding denser bone.
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only certain types of exercise adequately bend bones and move the fluid to the necessary bone cells.
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For most of us, weight lifting isn’t explosive enough to stimulate such bone bending. Neither is swimming. Running can be
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Surprisingly, brisk walking has been found to be effective at increasing bone density in older women, Dr. Barry says. But it must be truly brisk.
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There seems to be a plateau, however,
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Too much endurance exercise, it appears, may reduce bone density.
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it’s possible, but not yet proved, that exercise that is too prolonged or intense may lead to excessive calcium loss through sweat.
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a long-term study to determine whether supplementing with calcium-fortified chews before and after exercise reduces the bone-thinning response in competitive cyclists.
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the best exercise is to simply jump up and down
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hopping
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has one additional benefit: It tends to aid in balance, which may be as important as bone strength in keeping fractures at bay.
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If hopping seems an undignified exercise regimen, bear in mind that it has one additional benefit: It tends to aid in balance, which may be as important as bone strength in keeping fractures at bay.
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helmwoodfarm Dennen-ReedResearchers readily admit that they don't fully understand why some exercise is good for bones and some just isn't.
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sharon edwardshealthy muscles, strong bones, longer life
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13 Nov 09
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Then came a raft of unexpected findings, some showing that competitive swimmers had lower-than-anticipated bone density, others that, as an earlier Phys Ed column pointed out, competitive cyclists sometimes had fragile bones and, finally, some studies suggesting, to the surprise of many researchers, that weight lifting did not necessarily strengthen bones much.
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So he and many other researchers now maintain that bone receives the message to strengthen itself in response to exercise by a different means. He says that during certain types of exercise, the bone bends, but this doesn’t stretch cells; it squeezes fluids from one part of the bone matrix to another. The extra fluid inspires the cells bathed with it to respond by adding denser bone.
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Why should it matter what kind of message bones are receiving? Because, Professor Robling and others say, only certain types of exercise adequately bend bones and move the fluid to the necessary bone cells. An emerging scientific consensus seems to be, he says, that “large forces released in a relatively big burst” are probably crucial.
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The bone, he says, “needs a loud signal, coming fast.” For most of us, weight lifting isn’t explosive enough to stimulate such bone bending. Neither is swimming.
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Dr. Barry says that it’s possible, but not yet proved, that exercise that is too prolonged or intense may lead to excessive calcium loss through sweat. The body’s endocrine system may interpret this loss of calcium as serious enough to warrant leaching the mineral from bone.
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the best exercise is to simply jump up and down,
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12 Nov 09
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11 Nov 09
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