Does work posture affect static postural stability?

Fatigue that occurs following non-ergonomic work postures is a major reason for occupational falls. This study aimed to investigate the effects of four work postures (bending, squatting, sitting, and standing) on static postural stability. Twenty volunteers were recruited, and their static balance was assessed before (PRE), immediately after (POST 1), and after 10 minutes of resting (POST 2) following a simulation task in the four work postures until fatigue. Each postural sway variable in the four work postures during PRE, POST 1, and POST 2 was analysed using a one-way Analysis of Variance (ANOVA). Additionally, each postural sway variable in four work postures at POST 1 and POST 2 was analysed using one-way ANOVA. Results demonstrated poor static stability immediately after fatigue, especially in the sitting position. The findings of this study may aid in providing suggestions for re-designing certain work tasks to prevent falls and fall-related injuries.