Table 3.

Approximate comfort levels and corresponding RMS accelerations¹

${\overline{\alpha }}_{\mathrm{R}\mathrm{M}\mathrm{S}}$ , m/s2	Comfort Level
<0.315	Not uncomfortable
0.315–0.63	A little uncomfortable
0.5–1.0	Fairly uncomfortable
0.8–16	Uncomfortable
1.25–2.5	Very uncomfortable
>2.0	Extremely uncomfortable

¹Values taken from ISO 2631-1 (ISO 2631-1, 1997).