Low-frequency vibratory exercise reduces the risk of bone fracture more than walking: a randomized controlled trial
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1693558/
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BMC Musculoskelet Disord
PMC1693558
BMC =usculoskelet Disord. 2006; 7: 92.
Published online 2006 Nov =0. doi: 10.1186/1471-2474-7-92
PMCID: PMC1693558
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1
EFTA_R1_01261995
EFTA02330378
trial
Low-frequency =ibratory exercise reduces the risk of bone fracture more than walking: = randomized controlled
Narcis =usi,1 Armando =aimundo,2 and Alejo Leal3 Author information ►Article notes ►Copyright and License information ► This article has been cited by other =rticles in PMC. Go =o:
Abstract
Background
Whole-body vibration (WBV) is a new type of exercise =hat has been increasingly tested for the ability to prevent bone =ractures and osteoporosis in frail people. There are two currently =arketed vibrating plates: a) the whole plate oscillates up and down; b) =eciprocating vertical displacements on the left and right side of a =ulcrum, increasing the lateral accelerations. A few studies have shown =ecently the effectiveness of the up-and-down plate for increasing Bone =ineral Density (BMD) and balance; but the effectiveness of the =eciprocating plate technique remains mainly unknown. The aim was to =ompare the effects of WBV using a reciprocating platform at frequencies =ower than 20 Hz and a walking-based exercise programme on BMD and =alance in post-menopausal women.
Methods
Twenty-eight physically untrained post-menopausal women were =ssigned at random to a WBV group or a Walking group. Both experimental =rogrammes consisted of 3 sessions per week for 8 months. Each vibratory =ession included 6 bouts of 1 min (12.6 Hz in frequency and 3 cm in =mplitude with 60' of knee flexion) with 1 min rest between bouts. =ach walking session was 55 minutes of walking and 5 minutes of =tretching. Hip and lumbar BMD (g•cm-2) were measured using =ual-energy X-ray absorptiometry and balance was assessed by the blind =lamingo test. ANOVA for repeated measurements was adjusted by baseline =ata, weight and age.
Results
After 8 months, BMD at the femoral neck in the WBV group was =ncreased by 4.3% (P = 0.011) compared to the =alking group. In contrast, the BMD at the lumbar spine was unaltered in =oth groups. Balance was improved in the WBV group (29%) but not in the =alking group.
Conclusion
The 8-month course of vibratory exercise using a =eciprocating plate is feasible and is more effective than walking to =mprove two major determinants of bone fractures: hip BMD and =alance. Go to:
Background
Bone fracture is among the =ommonest and most expensive health problems in the population, =articularly in postmenopausal women [1]. The =ajor determinants of bone fractures are falls, bone fragility, loss of =alance and decrease of lower limb strength[2,3J. =hysical exercise is considered as an effective strategy, frequently =ecommended in general practice, for the prevention and management of =ostmenopausal osteoporosis[4,5]. =erobics, weight bearing and resistance exercises were all effective =ncreasing bone mass density[6]. =owever, arduous bone stress induced by vigorous weight-bearing =ctivities can increase the risk of injuries, particularly in the =Iderly[7]. =herefore, alternative strategies with a lower risk of injury have been =ought and usually included in the medical advice, such as walking