Department of Physical Education and Sports. Faculty of Sports Sciences, University of Granada, Granada, Spain; Escuela de Kinesiología, Facultad de Ciencias de la Salud, Universidad de Las Américas, Viña Del Mar, Chile.
Department of Physical Education and Sports. Faculty of Sports Sciences, University of Granada, Granada, Spain; Exercise and Rehabilitation Sciences Institute, School of Physical Therapy, Faculty of Rehabilitation Sciences, Universidad Andres Bello, Santiago, Chile.
Gait Posture. 2024 Jul;112:40-45. doi: 10.1016/j.gaitpost.2024.05.004. Epub 2024 May 8.
Despite the significance of muscle oscillation frequency, previous research has not established a correlation with muscle performance due to the challenges of applying resistance without altering natural motion during functional tests.
What is the correlation between muscle oscillation frequency and lower limb muscle strength, power, and work during an instrumented sit-to-stand and stand-to- sit (iSTS-TS) task among sedentary subjects?
In a cross-sectional study, the oscillation frequency of the gastrocnemius medialis (GM), biceps femoralis (BF), and vastus medialis (VM) muscles in both the dominant (D) and non-dominant (ND) legs was assessed with a handheld myotonometer in 34 sedentary individuals before performing the iSTS-TS task.
In the isokinetic mode, no significant correlations were found. In the isotonic mode, the BF muscle oscillation frequency in the D and ND legs exhibited significant positive correlations with peak force, peak power, and work during sitting down, as well as peak power and work during standing up. Positive correlations were observed in both legs between the GM oscillation frequency and sitting down peak force and work. Additionally, significant positive correlation was found with standing up work in the D leg. Muscle oscillation frequency of the VM exhibited a positive correlation with sitting down peak force in the ND leg.
Due to a greater number of correlations found, it is advisable to use the isotonic mode when assessing muscle oscillation frequency in relation to muscle performance during functional iSTS-TS tasks in sedentary subjects.
尽管肌肉振荡频率具有重要意义，但由于在功能测试中应用阻力时无法改变自然运动，因此之前的研究尚未确定其与肌肉性能之间的相关性。
在久坐受试者进行仪器化坐站-站起（iSTS-TS）任务期间，肌肉振荡频率与下肢肌肉力量、功率和功之间存在什么相关性？
在一项横断面研究中，使用手持式肌振仪在 34 名久坐受试者进行 iSTS-TS 任务之前，分别测量了优势（D）和非优势（ND）腿的腓肠肌内侧（GM）、股二头肌（BF）和股直肌（VM）肌肉的振荡频率。
在等速模式下，未发现显著相关性。在等张模式下，D 和 ND 腿的 BF 肌肉振荡频率与坐下时的峰值力、峰值功率和功，以及站立时的峰值功率和功呈显著正相关。GM 振荡频率与坐下时的峰值力和功在两腿之间均呈正相关。此外，D 腿的站立时功与 VM 肌肉振荡频率也呈显著正相关。ND 腿的 VM 肌肉振荡频率与坐下时的峰值力呈正相关。
由于发现了更多的相关性，因此建议在评估久坐受试者进行功能 iSTS-TS 任务时肌肉振荡频率与肌肉性能之间的相关性时，使用等张模式。
