Fernando Pessoa University, Porto, Portugal; Transdisciplinary Center of Consciousness Studies of Fernando Pessoa University, Porto, Portugal.
Fernando Pessoa University, Porto, Portugal; Transdisciplinary Center of Consciousness Studies of Fernando Pessoa University, Porto, Portugal; Longevity and Development Observatory of Fernando Pessoa University, Porto, Portugal.
J Voice. 2023 Jul;37(4):635.e15-635.e27. doi: 10.1016/j.jvoice.2021.03.029. Epub 2021 May 21.
Myofascial release (MFR) comprises a set of manual therapeutic techniques applied to many conditions, but specific evidence concerning its effects on body posture, muscle tension and voice has been lacking. Thus, the aim of this study was to verify the effects of MFR in teachers' posture, muscular tension and voice quality.
Randomized controlled trial - crossover.
Twenty-four teachers, after completing a Sociodemographic and Clinical Questionnaire and providing written informed consent, were randomly distributed into two groups designated Group 1 (G1; n = 12; received MFR first) and Group 2 (G2; n = 12; belong to control group first). All participants received treatment and were into control group, since, after a 14 day period, procedures were switched between groups. Photogrammetry, muscle tension assessed through palpation, algometry, aerodynamic assessment of voice, acoustic and auditory-perceptual analysis of voice were performed before and after interventions.
Regarding voice, statistically significant differences were found when intervention was applied to both groups for maximum phonation time (MPT) (G1 P = 0.019; G2 P = 0.004). The acoustic variables did not differ. Concerning the auditory-perceptual analysis of voice statistically significant differences were found when intervention was applied in both groups for Grade in G2 (P = 0.046) and for Roughness in G1 (P = 0.025). Regarding the photogrammetry assessment statistically significant differences were found when intervention was applied to both groups in many parameters while as control group they did not. Concerning the algometry and muscle tension assessed through palpation statistically significant differences were found when intervention was applied in all muscles.
Findings indicated that MFR seems to be an effective therapy in improving MPT, two subscales (Grade and Roughness) of the GRABASH scale, muscle tension assessed through palpation and algometry. Regarding photogrammetry, MFR had an immediately effect in improvement of the posture, especially related with head.
肌筋膜松解术（MFR）包含了一组应用于多种疾病的手动治疗技术，但关于其对身体姿势、肌肉紧张和声音影响的具体证据一直缺乏。因此，本研究旨在验证 MFR 对教师姿势、肌肉紧张和声音质量的影响。
随机对照交叉试验。
24 名教师完成社会人口学和临床问卷并书面同意后，随机分为两组，第 1 组（G1；n=12；先接受 MFR）和第 2 组（G2；n=12；先接受对照组）。所有参与者均接受治疗并进入对照组，因为在 14 天的间隔后，两组之间的程序进行了切换。在干预前后进行了摄影测量、通过触诊评估的肌肉紧张度、测力、声音的空气动力学评估、声音的声学和听觉感知分析。
关于声音，当对两组都应用干预时，最大发音时间（MPT）有统计学显著差异（G1 P=0.019；G2 P=0.004）。声学变量没有差异。关于声音的听觉感知分析，当对两组都应用干预时，G2 的等级（P=0.046）和 G1 的粗糙度（P=0.025）有统计学显著差异。关于摄影测量评估，当对两组都应用干预时，许多参数都有统计学显著差异，而作为对照组时则没有。关于触诊评估的肌肉紧张度和测力，当对所有肌肉都应用干预时，都有统计学显著差异。
研究结果表明，MFR 似乎是一种有效的治疗方法，可改善 MPT、GRABASH 量表的两个子量表（等级和粗糙度）、触诊评估的肌肉紧张度和测力。关于摄影测量，MFR 对姿势的改善有立即作用，尤其是与头部相关的姿势。
