[Purpose] This study was performed to investigate the difference in body pressure–related
sensory changes between the floor and mattress in a static supine position for
physiotherapy research. [Subjects and Methods] To analyze body pressure, the Body Pressure
Measurement System was used. Body pressure sensors were attached to mattresses and the
floor beneath the subjects. The level of pain was evaluated using pain score tools before
the static supine position was adopted, at 1, 5, 10, and 15 min, and in total for specific
body points. [Results] In analysis of digitized images, there was no significant
difference observed between floor and mattress body pressure values at the start position.
However, the head pressure intensity was significantly higher than that of the other body
parts. In analysis of pain scores, all body part pain scores except those for both legs
were significantly higher for the floor than for the mattress. Furthermore, the pain
scores of the floor group were significantly increased at minute 1 compared with those of
the mattress group. [Conclusion] These results suggest that properties that change in a
time-dependent manner and postural changes need to be carefully considered when applying
physical therapy.