Reliability of portable electrical impedance myograph SKULPT® for morphological measures of vastus lateralis/ Confiabilidade da impedância elétrica do miógrafo portátil SKULPT® a partir de medidas morfológicas do vastus lateralis
DOI:
https://doi.org/10.34117/bjdv7n4-037Keywords:
Muscle quality, portable electrical impedance, vastus lateralis.Abstract
New devices with clinical applicability are needed to provide fast and precise diagnostics. In this way, the aim of this study was to verify the reliability of the portable electrical impedance myograph (PEIM) Skulpt® for morphological measures of the vastus lateralis (VL). MATERIALS AND METHODS: A cross-sectional evaluation was designed on an independent limb to verify reliability between the PEIM Skulpt® and ultrasound (US) for VL muscle morphological measures. Twelve health men (age=32.17±8.90 years) participated in the study, being evaluated muscle quality (MQ) and fat mass (%FAT) with the PEIM on the frontal thigh position, and echo intensity (EI) and muscle and fat thickness (MT and FT) with the US. RESULTS: Equipment reliability (US vs. PEIM) indicated a moderate correlation [r=-0.53; p=0.770] between MQ and EI. Conversely, intra-rater reliability indicated moderate consistency for EI (p=0.021) and excellent for MT (p=0.008) and FT (p<0.001). In addition, excellent consistency was indicated for MQ (p<0.001) and %FAT (p<0.001). Proposed equations were applied in the contralateral lower limb (n=12). Subsequently, a Bland-Altman plot presented lower bias and higher agreement limits for both adjustment equations for PEIM between the MT and FT with MQ and %FAT, respectively. CONCLUSION: In summary, our results indicate moderate intra-rater reliability consistency for EI, excellent for MT and FT, and excellent for MQ, and %FAT. In addition, our proposed adjustment equation presents clinical application to control %FAT and MQ with different possibilities of application in adults, as it can be applied in aesthetics, health control, and even physiotherapeutic treatments.
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