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. 2014 Mar;26(3):377-80.
doi: 10.1589/jpts.26.377. Epub 2014 Mar 25.

Development and comparative evaluation of new shapes of pillows

Jin-Gang Her  1 , Do-Heung Ko  2 , Ji-Hae Woo  1 , Young-Eun Choi  3
Affiliations

Development and comparative evaluation of new shapes of pillows

Jin-Gang Her et al. J Phys Ther Sci. 2014 Mar.

Abstract

The purpose of this study was to determine pillow designs suitable for supine and side-lying positions. [Subjects] Twenty female and twenty male subjects with a mean age of 22.7 years (SD = 1.3) participated in the study. [Methods] First, a three-dimensional motion analysis system was used to analyze the movements of the head and the shoulder joints during changes from supine positions to side-lying positions. Second, the height from the face to the shoulder and the height from the floor to the middle of the neck in a side-lying position were measured. Third, the weight distribution ratios of the head and the trunk were compared using general pillows (polyester sponge), memory foam, and prototype pillows. [Results] During position changes from supine positions to side-lying positions, the head moved in a fan shape, and the shoulder joint moved an average of 4.4 cm upward. The height from the face to the shoulder was 9 cm on average. The height from the floor to the middle of the neck was 11 cm on average. The weight distribution ratios between the head and the trunk were compared among general pillows (polyester sponge), memory foam, and prototype pillows. The results showed significant differences in the side-lying position. [Conclusion] Pillows with uniform heights are not suitable for a supine or side-lying position. In the case of both positions, users should be allowed to select pillows in shapes that can support the neck.

Keywords: Motion analysis; Pillow; Sleep position.

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Figures

Fig. 1.
Fig. 1.
Prototype pillow A: An indent was made in the part of the surface of the pillow that contacted the shoulder in side-lying positions. B: The height from the face to the shoulder. C: The height from the floor to the middle neck. D: 23 × 9.5-cm air bag was built.
Fig. 2.
Fig. 2.
Head movement trajectory during movement from the supine to side-lying position
See this image and copyright information in PMC

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