Influence of muscle depth and thickness on ultrasound echo intensity of the vastus lateralis
Influence of muscle depth and thickness on ultrasound echo intensity of the vastus lateralis
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DOI：
10.1177/0284185120958405
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发表时间：
2020-09-30
期刊：
影响因子：
1.3
通讯作者：
Wells, Adam J.
中科院分区：
文献类型：
--
作者：
Varanoske, Alyssa N.;Coker, Nicholas A.;Wells, Adam J.
背景超声用于评估肌肉质量(即回声强度[EI])，但超声波在更深的组织中发生衰减，可能会影响这些测量。目的确定肌肉厚度(MT)是否影响EI，以及EI在肌肉浅层和深层之间是否存在差异。材料与方法对33例接受阻力训练的男性股外侧肌(VL)的MT、EI、皮下脂肪组织厚度(SAT)、皮下脂肪组织厚度(DISDEEP)、EI、EIFULL、EIDEEP、EISUPF进行测量。计算EISUPF与EIDEEP之间的差值(EIDIFF)。用重复测量方差分析(ANOVA)分析EIFULL、EISUPF和EIDEEP之间的平均差异。结果EISUPF大于EIDEEP(P<；0.001)和EIFUL(P<；0.001)。MT与EIFUL呈负相关(P<；0.001)，与EIDIFF呈正相关(P<；0.001)。SAT与任何EI指标均无相关性，但DISDEEP与EIDIFF呈正相关(P<；0.001)。结论VL的EI具有异质性，深部EI低于浅部EI。较厚的肌肉表现为较低的EI，但浅层和深层之间的EI差异较大。虽然SAT与EI不相关，但DISDEEP与EIDIFF相关，说明在评估肌肉质量时应考虑MT和SAT的组合。未来的研究是必要的，以确定阻力训练后EI的变化是否由MT的增加所驱动。
Background Ultrasonography is used to evaluate muscle quality (i.e. echo intensity [EI]), but an attenuation of ultrasound waves occurs in deeper tissues, potentially affecting these measures. Purpose To determine whether muscle thickness (MT) affects EI and if EI varies between the superficial and deep portions of the muscle. Materials and Methods MT, EI, subcutaneous adipose tissue thickness (SAT), tissue depth (DISDEEP), and EI of the overall (EIFULL) as well as deep (EIDEEP) and superficial (EISUPF) portions of the vastus lateralis (VL) were assessed in 33 resistance-trained males using ultrasonography. The difference (EIDIFF) between EISUPF and EIDEEP was calculated. Mean differences between EIFULL, EISUPF, and EIDEEP were analyzed using a repeated-measures analysis of variance (ANOVA). Relationships between measures of muscle depth/ thickness and EI were examined using Pearson's r. Results EISUPF was greater than EIDEEP (P < 0.001) and EIFULL (P < 0.001). MT was negatively correlated with EIFULL (P < 0.001) and positively correlated with EIDIFF (P < 0.001). SAT was not correlated with any EI measure, but DISDEEP was positively correlated with EIDIFF (P < 0.001). Conclusion EI of the VL is heterogeneous, as the deeper portion produces lower values than the superficial portion. Thicker muscles present lower EI but have greater discrepancies in EI between the superficial and deep portions. Although SAT was not correlated with EI, DISDEEP was related to EIDIFF, demonstrating that the combination of MT and SAT should be considered when evaluating muscle quality. Future research is necessary to determine if changes in EI following resistance training are driven by increases in MT.