Neuromuscular and Occupational Performance Laboratory, Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, TX, US.
Electrical and Computer Engineering, Integrative Center for Athletic and Sport Technology, College of Engineering, University of Alabama, Tuscaloosa, AL, US.
Med Eng Phys. 2024 Feb;124:104103. doi: 10.1016/j.medengphy.2024.104103. Epub 2024 Jan 10.
Recent works have shown bioelectrical impedance spectroscopy (BIS) may assess tissue quality. The purpose of this project was to examine associations between ultrasound echo intensity (EI) of quadriceps muscles (vastus lateralis [VL], vastus medialis [VM], vastus intermedius [VI], rectus femoris [RF]) and BIS parameters (R0, R1, C, α, fp), and if the associations are specific to individual muscles or associated with a representation of the entire quadriceps. Twenty-two participants (age: 22 ± 4 years; BMI: 25.47 ± 3.26 kg/m) participated in all study activities. Participants had transverse ultrasound scans of each individual quadriceps muscle taken at 25, 50, and 75 % of the muscle length to generate an average EI for the VL, VM, VI, and RF, which were further averaged to generate an EI for the entire quadriceps. For BIS, participants were seated with electrodes placed on the thigh to measure the segmental quadriceps. The Cole-impedance model parameters that best fit the BIS data for each participant was used for all analyses. Pearson's correlation coefficient (r) were calculated to determine associations between muscles' EI and BIS parameters. The results suggest averaged EI of individual VL, VM, VI, RF muscles and the average EI of the segmental quadriceps were significantly related to the R0, C, α metrics of the Cole-impedance model representing quadriceps segmental tissues. This supports that segmental BIS may be an appropriate technique for rapid evaluation of segmental muscle quality.
最近的研究表明，生物电阻抗光谱（BIS）可用于评估组织质量。本研究旨在探讨股四头肌超声回波强度（EI）与 BIS 参数（R0、R1、C、α、fp）之间的相关性，以及这些相关性是特定于单个肌肉还是与整个股四头肌的代表相关。22 名参与者（年龄：22±4 岁；BMI：25.47±3.26kg/m）参与了所有研究活动。参与者接受了股四头肌各个肌肉的横向超声扫描，在肌肉长度的 25%、50%和 75%处进行扫描，以生成 VL、VM、VI 和 RF 的平均 EI，然后进一步平均生成整个股四头肌的 EI。对于 BIS，参与者坐在大腿上放置电极以测量节段性股四头肌。使用最适合每位参与者 BIS 数据的 Cole 阻抗模型参数进行所有分析。计算 Pearson 相关系数（r）以确定肌肉 EI 和 BIS 参数之间的相关性。结果表明，个体 VL、VM、VI、RF 肌肉的平均 EI 以及节段性股四头肌的平均 EI 与 Cole 阻抗模型的 R0、C、α 指标显著相关，代表股四头肌节段组织。这支持节段性 BIS 可能是评估节段性肌肉质量的一种合适技术。
