Table 1. Average Data of Four Parameters in Four Different Postures.

Parameter	Body posture
	Standing	Chair sitting	Kneel sitting (Japanese)	Cross-legged sitting (Korean)
LLA (°)	37.1	17.9	31.8	9.8
SS (°)	35.3	20.3	38.3	13.4
PT (°)	15.7	28.2	14.2	38.3
PI (°)*	51.0	49.5	52.5	51.7

LLA: lumbar lordotic angle, SS: sacral slope, PT: pelvic tilt, PI: pelvic incidence.

^*PI = SS + PT.