Women's Health Research Laboratory, Department of Physical Therapy, Federal University of São Carlos, São Carlos, São Paulo, Brazil.
Department of Prevention and Rehabilitation in Physiotherapy, Biological Sciences Sector, Federal University of Paraná - UFPR, Curitiba, Paraná, Brazil.
J Manipulative Physiol Ther. 2021 Nov-Dec;44(9):743-750. doi: 10.1016/j.jmpt.2022.03.005. Epub 2022 Jun 24.
The purpose of this study was to assess the immediate effect of verbal and visual feedback on pelvic floor muscles (PFM) in nulliparous women without pelvic floor dysfunction.
In this observational, single-assessor, cross-sectional study, 45 female university students were evaluated using bidigital vaginal palpation and vaginal surface electromyography (EMG). EMG assessments were performed at 2 time points (T1 and T2). According to the protocol, participants performed 5 maximal voluntary contractions (MVC) with 10-second intervals, 5 sustained voluntary contractions (SVC) for 10 seconds, and a 60-second voluntary contraction until fatigue (CUF) before (T1) and after (T2) receiving verbal instructions and visual feedback on PFM contractions. At T2, women received visual feedback on their PFM contraction. Root mean square (RMS) for each repetition (MVC and VCF) was recorded, and mean value was calculated. Compensatory mechanisms during contraction were recorded visually. The difference in mean RMS (mV) for MVC, SVC, and CUF; curve integral for MVC, SVC, and CUF; median frequency (Hz) for CUF between T1 and T2 were analyzed with repeated measures multivariate analysis of variance.
Before the instructions, most participants (95.6%) performed PFM MVC using at least 1 compensatory mechanism. PFM EMG outcomes changed at T2: RMS and curve integral were reduced in T2 (P < .05) for MVC, SVC, and CUF. The median frequency increased from T1 to T2 in the CUF group (P = .01).
Verbal and visual feedback had an immediate impact on the EMG activity of PFM in nulliparous continent women.
本研究旨在评估言语和视觉反馈对无盆底功能障碍的初产妇盆底肌（PFM）的即刻影响。
在这项观察性、单评估者、横断面研究中，通过双指阴道触诊和阴道表面肌电图（EMG）对 45 名女大学生进行评估。EMG 评估在 2 个时间点（T1 和 T2）进行。根据方案，参与者在 T1 前和 T2 后（即 T1 前和 T2 后）进行 5 次 10 秒间隔的最大自主收缩（MVC）、5 次 10 秒的持续自主收缩（SVC）和 60 秒的自主收缩直至疲劳（CUF），同时接受 PFM 收缩的口头指令和视觉反馈。在 T2，女性接受了关于其 PFM 收缩的视觉反馈。记录了每个重复（MVC 和 VCF）的均方根（RMS），并计算了平均值。视觉记录收缩时的代偿机制。分析 T1 和 T2 之间 MVC、SVC 和 CUF 的平均 RMS（mV）差异、MVC、SVC 和 CUF 的曲线积分差异以及 CUF 的中值频率（Hz）差异，采用重复测量多元方差分析。
在接受指导之前，大多数参与者（95.6%）至少使用 1 种代偿机制进行 PFM MVC。T2 时 PFM EMG 结果发生变化：MVC、SVC 和 CUF 的 RMS 和曲线积分在 T2 时降低（P<.05）。CUF 组的中值频率从 T1 到 T2 增加（P=.01）。
言语和视觉反馈对无盆底功能障碍的初产妇的 PFM 肌电图活动有即刻影响。
