Article

Strength training preserves the bone mineral density of postmenopausal women without hormone replacement therapy.

Federal University of São Paulo and Heart Institute, Medical School of São Paulo University, Rue General Chagas Santos 392, CEP: 04146-050. São Paulo, Brazil.
Journal of Aging and Health (impact factor: 1.56). 02/2009; 21(3):519-27. DOI:10.1177/0898264309332839 pp.519-27
Source: PubMed

ABSTRACT The study was designed to evaluate the effects of strength training (ST) on the bone mineral density (BMD) of postmenopausal women without hormone replacement therapy.
Subjects were randomized into untrained (UN) or trained (TR) groups. The TR group exercised three ST sessions per week for 24 weeks, and body composition, muscular strength, and BMD of the lumbar spine and femur neck were evaluated.
Body weight, mass index, and fat percentage were lower after 24 weeks only in the TR group (p < .05). SR also improved the one repetition maximum test in 46% and 39% of upper and lower limbs, respectively. The percentage of demineralization was higher in the UN group than in the TR group at the lumbar spine and femoral neck (p < .05).
Results indicated that 24 weeks of ST improved body composition parameters, increased muscular strength, and preserved BMD in postmenopausal women.

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    Article: Moderate resistive training maintains bone mineral density and improves functional fitness in postmenopausal women.
    Danilo Sales Bocalini, Andrey Jorge Serra, Leonardo Dos Santos
    [show abstract] [hide abstract]
    ABSTRACT: Twenty five subjects were randomized to untrained (UN) and resistive-trained (RT) groups. The RT group exercised three sessions per week at 60%-70% of the load according to individual 1RM test during 24 weeks. Both groups were evaluated before and after protocol period assessing lumbar spine (LS) and femoral neck (FN) BMD by dual-energy X-ray absorptiometry, VO(2) max, and neuromuscular fitness. After 24 weeks, there were significant reductions in LS (0.89 ± 0.16% loss) and FN BMD (1.54 ± 0.35% loss) for UN but no change was found in the TR (LS: 0.01 ± 0.12% and FN: 0.04 ± 0.05% loss). The UN group had no changes in neuromuscular performance. However, RT exhibited a significant improvement on the functional fitness parameters evaluated, with the exception of agility. Our results indicate RT suppresses the decline in BMD and simultaneously improves the functional fitness of postmenopausal women without hormone replacement therapy, which may reduce fall risk and related bone fractures.
    Journal of aging research 01/2010; 2010:760818.
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Keywords

body composition
 
body composition parameters
 
Body weight
 
bone mineral density
 
demineralization
 
hormone replacement therapy
 
lower limbs
 
lumbar spine
 
mass index
 
muscular strength
 
one repetition maximum test
 
postmenopausal women
 
strength training
 
TR
 
TR group
 
UN
 
UN group
 
untrained