Echo Intensity Versus Muscle Function Correlations in Older Adults are Influenced by Subcutaneous Fat Thickness

Ultrasound in Medicine & Biology
Matt S StockBrennan J Thompson

Abstract

Recently, an equation that allows investigators to correct echo intensity for subcutaneous fat was developed. We evaluated correlations between uncorrected and corrected echo intensity versus measures of lower-extremity function. Twenty-three older adults (11 men, 12 women; mean age = 72 y) participated. B-Mode ultrasonography was used to quantify rectus femoris echo intensity and subcutaneous fat thickness. Knee extensor isometric peak torque and rate of torque development at 200 ms (RTD200) were determined (joint angle = 90°). Fast gait speed was evaluated at 10- and 400-m distances. Partial correlations between normalized peak torque, RTD200 and 10- and 400-m gait speed versus uncorrected echo intensity were weak and insignificant. Correction for subcutaneous fat strengthened the correlations (peak torque r = -0.500, RTD200 r= -0.425, 10-m r = -0.409, 400-m r = -0.410). Correcting echo intensity values for subcutaneous fat strengthened the associations with lower-extremity muscle function in older adults.

Citations

May 26, 2020·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Matt S StockDavid C Phan
Jan 10, 2020·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Dustin J OranchukJohn B Cronin
May 27, 2020·Aging Clinical and Experimental Research·Daniel KomfortiMatt S Stock
Aug 11, 2020·Experimental Gerontology·Akash U BaliMatt S Stock
Feb 13, 2021·Research in Sports Medicine·Jayden GarrettGlen Johnson
Nov 23, 2020·European Journal of Applied Physiology·Matt S Stock, Brennan J Thompson
Feb 27, 2021·Physiological Measurement·Hayden K GiulianiEric D Ryan
Nov 7, 2020·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Jonathan Neto MüllerHeiliane de Brito Fontana
May 5, 2021·Ultrasound in Medicine & Biology·Steven J ObstLee Barber
Oct 7, 2020·Journal of Clinical Densitometry : the Official Journal of the International Society for Clinical Densitometry·Jun Seob SongJeremy P Loenneke
Sep 15, 2021·Journal of Ultrasound·Jaquelini Betta CaneverKelly Mônica Marinho E Lima
Jan 16, 2022·International Journal of Obesity : Journal of the International Association for the Study of Obesity·Yesenia García-AlonsoRobinson Ramírez-Vélez

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