5 years ago5,000+ Views
I was always told that low impact exercises like swimming were ideal for keeping your body from becoming too stressed or overworked. This was especially true when my mother got her hip replaced and tried to strengthen the muscles around the new hip without aggravating the brand new "bone" in her hip. It turns out that as long as you aren't recovering from a surgery like my mother's, high-impact exercises can actually strengthen your bones! Just be sure that your body hasn't grown used to low impact, as you may have a negative reaction. Read this article for more info on the subject. This article appeared in the March 9, 2014 issue of The New York Times Magazine. "Bones should be jarred, for their own good. Past experiments have definitively established that subjecting bones to abrupt stress prompts them to add mass or at least reduces their loss of mass as people age. What has been in dispute, however, is how much force is needed to stimulate bone — and how to apply that force in daily life. Recently researchers at the University of Bristol gathered male and female adolescents — the body accumulates bone mass rapidly at this time of life — and had them go about their daily routines while they wore activity monitors. The bone density of the volunteers’ hips was also measured. A week later, the scientists reclaimed the monitors to check each teenager’s exposure to G forces­, a measure of impact. Those who experienced impacts of 4.2 G’s or greater — though these were infrequent — had notably sturdier hipbones. Additional work done by the same researchers showed that running a 10-minute mile or jumping up onto and down from a box at least 15 inches high was needed to produce forces that great. The significance of these findings is that people should probably run pretty fast or jump high to generate forces great enough to help build bone. Unfortunately, few older adults are likely to be doing so. In follow-up experiments, the same researchers equipped 20 women older than 60 with activity monitors and ran them through an aerobics class, several brief and increasingly brisk walks and a session of stepping onto and off a foot-high box. None of the women reached the 4-G threshold ­— none, in fact, generated more than 2.1 G’s of force at any point during the various exercises. The implications are somewhat concerning. Dr. Jon Tobias, a professor of rheumatology at the University of Bristol who led the experiments, says that while impacts that produce fewer than 4 G’s of force may help adults maintain bone mass — a possibility that he and his colleagues are exploring in ongoing experiments — it’s unclear what level of force below 4 G’s is needed. So, Dr. Tobias says, young people and healthy adults should probably pound the ground, at least sometimes. Sprint. Jump off a box 15 inches or higher at your gym and jump back up. Hop in place. A study by other researchers published in January found that women between 25 and 50 who hopped at least 10 times twice a day, with 30 seconds between each hop, significantly increased their hipbone density after four months. Another group of subjects, who hopped 20 times daily, showed even greater gains. Alas, a kind of Catch-22 confronts older individuals who have not been engaging in high-impact exercise: Their bodies and bones may not be capable of handling the types of activity most likely to improve bone health. Dr. Tobias and his colleagues hope to better understand what level of impact will benefit these people. In the meantime, anyone uncertain about the state of his or her bones should consult a physician before undertaking high-impact exercise (a caveat that also applies to those with a history of joint problems, including arthritis). For his part, Dr. Tobias says, “I plan to keep running until my joints wear out.”
Well it's nice to know that all those years running and jumping around the tennis court didn't completely ruin my knees! I hope this article is right!
I've done a lot of running since I was quite young and never seemed to have any problems. I take calcium supplements and try to drink milk and eat other foods high in calcium - aside from that I always take time to warm up but I don't know if that makes much difference to my bones..?
I will still stick to my low impact routines. I just don't feel comfortable running too hard, etc
I feel like I've made my body accustomed to light treatment, I dont think I'd react well to too much high impact now
@sophiamor I remember my knees hurting during long tennis matches too :/ @flymetothemoon calcium is great for bone health!!
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