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Weight bearing
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Weight bearing - July 8, 2005 5:03:00 AM
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jwillardPTA
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Joined: July 7, 2005
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Does anyone have any articles or references related to the benefits of weight bearing?
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Re: Weight bearing - July 8, 2005 2:02:00 PM
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karmzack
Posts: 181
Joined: March 20, 2005
From: Hawaii
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aquatherapysc, I don’t agree with that article(see below), cycling is not an effective bone density builder.
Also I read somewhere that if you what to increase total bone density by weight training you should perform exercises that place the load through the spine, such as squats, I don’t think it’s all that surprising.
Total and regional bone density in male runners, cyclists, and controls.
STEWART, A. D., and J. HANNAN. Total and regional bone density in male runners, cyclists, and controls. Med. Sci. Sports Exerc., Vol. 32, No. 8, pp. 1373-1377, 2000.
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.
There has to be more than a few NASA studies related to the benefits of weightbearing.
_____________________________
Zack Solomon MPT, OCS, CSCS
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Re: Weight bearing - July 8, 2005 2:07:00 PM
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jma
Posts: 2432
Joined: August 24, 2000
From: NY
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You can probably do a medline search of weight bearing and osteoporosis and get a multitude of articles. Here is one that you might find interesting. See below.
"Nippon Eiseigaku Zasshi. 2003 Sep;58(3):328-37. Related Articles, Links
[Exercise and physical activities for the prevention of osteoporotic fractures: a review of the evidence]
[Article in Japanese]
Yoshimura N.
Department of Public Health, Wakayama Medical University, School of Medicine, 811-1 Kimiidera, Wakayama 641-0012, Japan. norinori@wakayama-med.ac.jp
According that osteoporosis is the common condition in an aging society such as in Japan, much progress has been made in understanding the treatment and prevention of osteoporosis. Among potential risk factors, exercise and physical activities have been recognized as lifestyle factors that might influence the risk of osteoporosis and osteoporotic fractures. To assess the relationship between exercises including physical activities and the risk for low bone mass and osteoporosis-related fractures, a literature search over past 13 years was conducted. Accumulating evidence indicates that exercises decrease the risk for hip fractures among middle aged and older men and women. Exercises also help to maintain muscle strength, muscle volume, balance, and joint flexibility, which might prevent falls and fall-related fractures. One randomized controlled trial showed back-stretching exercise reduced the risk for vertebral fractures. The literature search also indicates that high-impact and/or weight-bearing exercise might increase the bone density in the elderly and the peak bone mass among young women, while there is no association between moderate or lower-impact exercise and bone mineral density. Future research should be required to evaluate the types and quantity of physical activity needed for the prevention of osteoporosis.
PMID: 14533562 [PubMed - indexed for MEDLINE]"
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Re: Weight bearing - July 8, 2005 7:45:00 PM
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Randy Dixon
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Joined: August 6, 2004
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weight bearing as opposed to what? Bedrest? I think their is a lot of research on the effects of bedrest.
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