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Skeletal muscle mass estimation in Brazilian Jiu-Jitsu athletes: validation of predictive equations.

Year: 2025

Type: article

Abstract: < 0.001), although with proportional underestimation (slope = 0.642). Reliability was acceptable for all equations (ICC > 0.79), and the Sagayama equation demonstrated the lowest CV% (13.4%, 95% CI: 9.44%-17.36%). Bland-Altman analysis revealed systematic biases, particularly for the Kim equation. All three equations provided accurate validity and reliability for estimating absolute SMM (kg) in BJJ athletes. However, the McCarthy and Sagayama equations showed less bias and greater agreement by DXA, supporting their use for accurate quantification of SMM in this population. Their validation with magnetic resonance imaging is needed.

Source: PubMed

DOI: 10.3389/fnut.2025.1595259

Authors: Alex Ojeda-Aravena, Eduardo Báez-San Marín, Xurxo Dopico-Calvo, Mauricio Cresp-Barría, Jorge Olivares-Arancibia, Jairo Azócar-Gallardo

Institutions: Universidad de Los Lagos, Viña del Mar University, Universidad de Playa Ancha de Ciencias de la Educación, Universidade da Coruña, Universidad Católica de Temuco, University of the Americas

Language: English

Topic: Body Composition Measurement Techniques

Subfield: Physiology

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: green

OpenAlex ID: W4412957794

FWCI:

Cites: 24

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Related to: 10