The supine and lateral positions occupied large part of the entire sleep
process. Therefore designing a suitable pillow to provide good
support for both supine and lateral positions is important.
The current paper aims to provide a suitable pillow for promoting
sleep quality. Study 1 investigated the proportions of the
four sleep positions and unnatural postures during sleep to derive
key-points of pillow design. Study 2 measured body dimensions
related to pillow design of subjects to determine suitable pillow
sizes. Study 3 proposed a suitable pillow concept according to
design key-points. Study 4 tested sleep quality of subjects by using
the newly designed pillow and the current pillow to validate the
new concept design.