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PURPOSE: The aim of this study was to assess the agreement between various methods commonly used for quantifying SMM and evaluate the relationship between single site vastus lateralis (VL) MT and leg lean soft tissue mass (LSTM) in young, healthy women.

METHODS: 21 young, healthy women (BMI: 20.0-34.4 kg/m 2) arrived at the laboratory following a 12 h overnight fast. Participants underwent a series of body composition assessments, including DXA (GE-Lunar iDXA), BIA (InBody 770), and muscle US. DXA and BIA were used to assess WB and segmental LSTM and SMM, respectively. US was used to measure ALM and VL MT. The agreement between the various methods was assessed using Bland-Altman plots. Additionally, the relationship between DXA single-leg LSTM and VL MT was evaluated using Pearson correlations.

RESULTS: Bland-Altman analysis revealed a large bias between BIA …