REGIONAL BODY COMPOSITION AND MUSCLE STRENGTH ARE RELATED TO BONE MINERAL CONTENT IN ELDERLY
ABSTRACT Introduction: The increase, or maintenance, of lean body mass and muscle strength are major determinants of functional independence in the elderly, since they are associated with bone remodeling, and therefore with a reduced risk of falls and fractures. However, the regional relationship between lean body mass/strength and bone mineral content (BMC) has not sufficient theoretical support. Objective: To analyze whether regional body composition and muscle strength are factors potentially related to BMC. Methods: Ten older men (63.3±6.4 years, 169.4±6.8 cm and 79.3±10.5 kg) underwent body composition assessments using dual energy X-ray absorptiometry (DXA) to obtain regional and whole-body lean mass and BMC measures. The subjects also underwent the one-repetition maximum (1RM) test involving flat bench press, 45° leg press, arm curl and knee extension. Regional/whole-body composition and 1RM values were correlated to BMC using Pearson's coefficient (r). The level of significance for the correlations was p ≤0.05, the confidence interval was 95% (Z1-a/2=1.96), and the sample power was 80% (1-b). Results: The flat bench press 1RM was related to BMC in the left (r=0.764) and right (r=0.748) arms, while the 45° leg press 1RM was associated with BMC in the left (r=0.677) and right (r=0.714) legs and trunk (r=0.810), with sample power of 77.7%, 66.8%, 12.7%, 40.4% and 97.0%, respectively. Whole-body BMC was related to abdominal skinfold (r=0.819), lean mass of left arm (r=0.834), left (r=0.845) and right (r=0.868) legs, and whole-body lean mass (r=0.787), with sample power of 98.4%, 99.6%, 99.9%, 100.0% and 90.1%, respectively. Conclusion: The results supported regional lean body mass as a parameter related to BMC, with potential similar to that consistently reported for whole-body lean mass. Results also suggested that muscle strength plays an important role in improving or maintaining regional and whole-body BMC. Level of Evidence II; Development of diagnostic criteria in consecutive patients (with “gold” benchmark standard applied).
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Sociedade Brasileira de Medicina do Exercício e do Esporte
2018
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oai:scielo:S1517-869220180005003662018-10-24REGIONAL BODY COMPOSITION AND MUSCLE STRENGTH ARE RELATED TO BONE MINERAL CONTENT IN ELDERLYSiqueira,Leandro Oliveira Da CruzMachado,César FernandesSiminato,Astor ReisSancassani,AndreiSantos,Luiz Gustavo Almeida dosGomes,Larissa Aparecida TakehanaZago,Anderson SaranzPessôa Filho,Dalton Muller Muscle strength Body composition Bone density Aged ABSTRACT Introduction: The increase, or maintenance, of lean body mass and muscle strength are major determinants of functional independence in the elderly, since they are associated with bone remodeling, and therefore with a reduced risk of falls and fractures. However, the regional relationship between lean body mass/strength and bone mineral content (BMC) has not sufficient theoretical support. Objective: To analyze whether regional body composition and muscle strength are factors potentially related to BMC. Methods: Ten older men (63.3±6.4 years, 169.4±6.8 cm and 79.3±10.5 kg) underwent body composition assessments using dual energy X-ray absorptiometry (DXA) to obtain regional and whole-body lean mass and BMC measures. The subjects also underwent the one-repetition maximum (1RM) test involving flat bench press, 45° leg press, arm curl and knee extension. Regional/whole-body composition and 1RM values were correlated to BMC using Pearson's coefficient (r). The level of significance for the correlations was p ≤0.05, the confidence interval was 95% (Z1-a/2=1.96), and the sample power was 80% (1-b). Results: The flat bench press 1RM was related to BMC in the left (r=0.764) and right (r=0.748) arms, while the 45° leg press 1RM was associated with BMC in the left (r=0.677) and right (r=0.714) legs and trunk (r=0.810), with sample power of 77.7%, 66.8%, 12.7%, 40.4% and 97.0%, respectively. Whole-body BMC was related to abdominal skinfold (r=0.819), lean mass of left arm (r=0.834), left (r=0.845) and right (r=0.868) legs, and whole-body lean mass (r=0.787), with sample power of 98.4%, 99.6%, 99.9%, 100.0% and 90.1%, respectively. Conclusion: The results supported regional lean body mass as a parameter related to BMC, with potential similar to that consistently reported for whole-body lean mass. Results also suggested that muscle strength plays an important role in improving or maintaining regional and whole-body BMC. Level of Evidence II; Development of diagnostic criteria in consecutive patients (with “gold” benchmark standard applied).info:eu-repo/semantics/openAccessSociedade Brasileira de Medicina do Exercício e do EsporteRevista Brasileira de Medicina do Esporte v.24 n.5 20182018-09-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-86922018000500366en10.1590/1517-869220182405182694 |
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Siqueira,Leandro Oliveira Da Cruz Machado,César Fernandes Siminato,Astor Reis Sancassani,Andrei Santos,Luiz Gustavo Almeida dos Gomes,Larissa Aparecida Takehana Zago,Anderson Saranz Pessôa Filho,Dalton Muller |
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Siqueira,Leandro Oliveira Da Cruz Machado,César Fernandes Siminato,Astor Reis Sancassani,Andrei Santos,Luiz Gustavo Almeida dos Gomes,Larissa Aparecida Takehana Zago,Anderson Saranz Pessôa Filho,Dalton Muller REGIONAL BODY COMPOSITION AND MUSCLE STRENGTH ARE RELATED TO BONE MINERAL CONTENT IN ELDERLY |
author_facet |
Siqueira,Leandro Oliveira Da Cruz Machado,César Fernandes Siminato,Astor Reis Sancassani,Andrei Santos,Luiz Gustavo Almeida dos Gomes,Larissa Aparecida Takehana Zago,Anderson Saranz Pessôa Filho,Dalton Muller |
author_sort |
Siqueira,Leandro Oliveira Da Cruz |
title |
REGIONAL BODY COMPOSITION AND MUSCLE STRENGTH ARE RELATED TO BONE MINERAL CONTENT IN ELDERLY |
title_short |
REGIONAL BODY COMPOSITION AND MUSCLE STRENGTH ARE RELATED TO BONE MINERAL CONTENT IN ELDERLY |
title_full |
REGIONAL BODY COMPOSITION AND MUSCLE STRENGTH ARE RELATED TO BONE MINERAL CONTENT IN ELDERLY |
title_fullStr |
REGIONAL BODY COMPOSITION AND MUSCLE STRENGTH ARE RELATED TO BONE MINERAL CONTENT IN ELDERLY |
title_full_unstemmed |
REGIONAL BODY COMPOSITION AND MUSCLE STRENGTH ARE RELATED TO BONE MINERAL CONTENT IN ELDERLY |
title_sort |
regional body composition and muscle strength are related to bone mineral content in elderly |
description |
ABSTRACT Introduction: The increase, or maintenance, of lean body mass and muscle strength are major determinants of functional independence in the elderly, since they are associated with bone remodeling, and therefore with a reduced risk of falls and fractures. However, the regional relationship between lean body mass/strength and bone mineral content (BMC) has not sufficient theoretical support. Objective: To analyze whether regional body composition and muscle strength are factors potentially related to BMC. Methods: Ten older men (63.3±6.4 years, 169.4±6.8 cm and 79.3±10.5 kg) underwent body composition assessments using dual energy X-ray absorptiometry (DXA) to obtain regional and whole-body lean mass and BMC measures. The subjects also underwent the one-repetition maximum (1RM) test involving flat bench press, 45° leg press, arm curl and knee extension. Regional/whole-body composition and 1RM values were correlated to BMC using Pearson's coefficient (r). The level of significance for the correlations was p ≤0.05, the confidence interval was 95% (Z1-a/2=1.96), and the sample power was 80% (1-b). Results: The flat bench press 1RM was related to BMC in the left (r=0.764) and right (r=0.748) arms, while the 45° leg press 1RM was associated with BMC in the left (r=0.677) and right (r=0.714) legs and trunk (r=0.810), with sample power of 77.7%, 66.8%, 12.7%, 40.4% and 97.0%, respectively. Whole-body BMC was related to abdominal skinfold (r=0.819), lean mass of left arm (r=0.834), left (r=0.845) and right (r=0.868) legs, and whole-body lean mass (r=0.787), with sample power of 98.4%, 99.6%, 99.9%, 100.0% and 90.1%, respectively. Conclusion: The results supported regional lean body mass as a parameter related to BMC, with potential similar to that consistently reported for whole-body lean mass. Results also suggested that muscle strength plays an important role in improving or maintaining regional and whole-body BMC. Level of Evidence II; Development of diagnostic criteria in consecutive patients (with “gold” benchmark standard applied). |
publisher |
Sociedade Brasileira de Medicina do Exercício e do Esporte |
publishDate |
2018 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-86922018000500366 |
work_keys_str_mv |
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