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Title: Ultrasound imaging in women's arm flexor muscles : intra-rater reliability of muscle thickness and echo intensity
Authors: Vieira, Amilton
Siqueira, Angelina Freitas
Ferreira Júnior, João B.
Pereira, Paulo
Wagner, Dale
Bottaro, Martim
Assunto:: Ultrassonografia
Hipertrofia muscular
Issue Date: Nov-2016
Publisher: Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia
Citation: VIEIRA, Amilton et al. Ultrasound imaging in women's arm flexor muscles: intra-rater reliability of muscle thickness and echo intensity. Brazilian Journal of Physical Therapy, São Carlos, v. 20, n. 6, p. 535-542, nov./dez. 2016. Disponível em: <>. Acesso em: 4 jan. 2018. Epub Sep 22, 2016. doi:
Abstract: Background Different ultrasound parameters have been frequently used to assess changes associated with training, aging, immobilization, and neuromuscular diseases. However, an exploratory reliability analysis of the echo intensity (EI) and muscle thickness (MT) of the forearm flexors is scarce, especially in women. Objective The purpose of the present study was to determine the intra-rater reliability of MT and EI assessed by ultrasound in young women. Method Ultrasonographic MT and EI were acquired in the forearm flexors of 41 young women (22±2 yrs). Reliability was calculated using intraclass correlation coefficient (ICC2,1), standard error of measurement (SEM), coefficient of variation (CV), smallest detectable change (SDC), and Bland and Altman plot analysis. Results ICC values for MT and EI were 0.88 (95% CI: 0.78-0.93). The SEM and CV values were lower than 10%. Bland and Altman analysis revealed that ultrasound mean differences were 0.27 mm (Limits of Agreement - LOA 95%: - 2.6 to 3.2 mm) and -0.09 a.u. (LOA 95%: - 10.9 to 10.7 a.u.). Conclusion MT and EI assessed by ultrasonography in young women appear to be reliable and may be used to monitor changes in muscle mass induced by strength training when these changes exceed the precision of ultrasound.
Licença:: Brazilian Journal of Physical Therapy - This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0). Fonte: Acesso em: 4 jan. 2018.
Appears in Collections:FEF - Artigos publicados em periódicos

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