Sex influences the prediction of both parameters. High hEIM muscle quality relates to greater muscle-size:subcutaneous-fat ratio and contractile tissue content. In conclusion, high hEIM local fat percentage relates to greater subcutaneous fat and intramuscular non-contractile tissue content. Multiple regression analysis showed that SUBfat, EIus, and sex explained 86% of SKfat variance, whereas ACSAQF/SUBfat, sex and EIus explained 75% of MQ variance.

Correlations between MQ, EIus, quadriceps femoris anatomical cross-sectional area (ACSAQF), knee extensors maximum voluntary isometric torque (T), T/ACSAQF, EIus/SUBfat, and ACSAQF/SUBfat were also assessed. Correlations between SKfat, local subcutaneous fat (SUBfat), and echo intensity (EIus) were explored. The right anterior thigh of 90 healthy participants (mean±SD age=22.9☒.9 years 46 men: BMI=23.9 ± 2.4 kgm-2 46 women: BMI=21.1 ± 1.9 kgm-2) was scanned by hEIM and ultrasound. The present study investigated the relationship between local fat percentage (SKfat) and muscle quality (MQ) estimated by a new hand-held electrical impedance myography (hEIM) device or derived from ultrasound and strength assessments. The findings suggest that electrode array should be selected appropriately according to the size of the tested muscle. These results indicate reasonable repeatability of the handheld electrode arrays for EIM measurements. High-frequency current tended to improve the ICC for the small sensor. The ICCs of the large sensor were higher than those of the small sensor for both the intrarater and interrater reliabilities. The repeatability of the resistance, reactance, and phase angle at two different current frequencies (50 and 100 kHz) was assessed by the intraclass correlation coefficient (ICC). The procedures were also repeated 5 to 8 days after the first recording session. Electrical impedance myography of the biceps brachii muscle of twenty healthy individuals was performed by two raters using both large and small sensors. The objective of this study was to evaluate the interrater and intrarater reliability of electrical impedance myography (EIM) using handheld sensors of different sizes.

Kairon yeng