The current study was carried out with the aim of investigating the effect of maximally relaxed lying posture on disfluencies in young adults who stutter. A total of 24 participants (17 males, seven females; mean age = 24.9 ± 6.2 years) with developmental stuttering were a part of the study. The participants were asked to perform spontaneous speaking and reading aloud tasks in standard sitting and maximally relaxed lying postures. The severity of stuttering for the studied postures was estimated by using the Stuttering Severity Instrument. The results on the Stuttering Severity Instrument showed that stuttering parameters improved during the maximally relaxed lying posture compared with the standard sitting position. The results are discussed in the light of motor control concepts. It is concluded that the maximally relaxed lying posture can facilitate improvement in stuttering scores during spontaneous speaking as well as reading aloud in young adults who stutter. Reduced stuttering scores in the maximally relaxed lying posture suggest that speech therapists can position participants in this position while treating people who stutter.

进行本研究的目的是调查最大程度地放松躺卧姿势对口吃年轻成年人的不便感的影响。该研究共包括24例发育性口吃的参与者（男17例，女7例；平均年龄= 24.9±6.2岁）。要求参与者以标准的坐姿和最大程度的放松躺卧姿势进行自发的说话和朗读任务。通过使用“口吃严重程度仪器”估计了所研究姿势的口吃严重程度。口吃严重程度仪器的结果表明，与标准坐姿相比，最大放松的躺姿期间的口吃参数得到了改善。将根据电动机控制概念来讨论结果。结论是，最大程度地放松的躺卧姿势可以促进自发说话期间口吃分数的提高，以及在口吃的年轻人中大声朗读。最大程度地放松躺姿时的口吃分数降低表明，言语治疗师可以在治疗口吃者的同时将参与者定位在该位置。