Over 450 adverse incidents have been reported in infant inclined sleep products over the past 10 years, with many infants found dead in both the supine and prone positions. The unique design of inclined sleep products may present unexplored suffocation risks related to how these products impact an infant’s ability to move. The purpose of this study was to assess body movement and muscle activity of healthy infants when they lie supine and prone on different inclined sleep products. Fifteen healthy full-term infants (age: 17.7±4.9 weeks) were recruited for this IRB-approved study. Three inclined sleep products with unique features, representative of different sleeper designs, were included. Surface electromyography (EMG) was recorded from infants’ cervical paraspinal, abdominal, and lumbar erector spinae muscles for 60 seconds during supine and prone positioning. Neck and trunk sagittal plane movements were evaluated for each testing condition. Paired t-tests and Wilcoxon signed-rank tests were performed to compare each inclined sleeper to a flat crib mattress (0° baseline condition). During prone positioning, abdominal muscle activity significantly nearly doubled for all inclined sleep products compared to the flat crib mattress, while erector spinae muscle activity decreased by up to 48%. Trunk movement significantly increased compared to the flat crib mattress during prone lying. During prone lying, inclined sleep products resulted in significantly higher muscle activity of the trunk core muscles (abdominals) and trunk movement, which has the potential to exacerbate fatigue and contribute to suffocation if an infant cannot self-correct to the supine position.

在过去的 10 年中，婴儿倾斜睡眠产品已报告了 450 多起不良事件，发现许多婴儿在仰卧和俯卧位时死亡。倾斜睡眠产品的独特设计可能会带来与这些产品如何影响婴儿活​​动能力相关的未曾探索的窒息风险。本研究的目的是评估健康婴儿仰卧和俯卧使用不同倾斜睡眠产品时的身体运动和肌肉活动。这项 IRB 批准的研究招募了 15 名健康足月婴儿（年龄：17.7±4.9 周）。包括三种具有独特功能的倾斜睡眠产品，代表不同的睡眠设计。表面肌电图 (EMG) 从婴儿的颈椎旁、腹部、仰卧位和俯卧位时，腰部竖脊肌锻炼 60 秒。针对每个测试条件评估颈部和躯干矢状面运动。进行配对 t 检验和 Wilcoxon 符号秩检验以将每个倾斜的睡眠者与平坦的婴儿床床垫（0° 基线条件）进行比较。在俯卧位期间，与扁平婴儿床床垫相比，所有倾斜睡眠产品的腹部肌肉活动显着增加了近一倍，而竖脊肌活动减少了高达 48%。俯卧时，与扁平婴儿床床垫相比，躯干运动显着增加。在俯卧时，倾斜睡眠产品导致躯干核心肌肉（腹部）和躯干运动的肌肉活动显着增加，