Table 2.

Comparison of studies on lumbar disc compression

	Current study	Neuschwander et al. [7]	Kimura et al. [5]a	Lee et al. [6]b	Tarantino et al. [10]
n (number of subjects)	6	8	8	15	57
Disc compression (standing-supine) (mm)
L1/2	0.45 ± 0.28	0.64 ± 0.18	0.1
L2/L3	0.26 ± 0.29	1.21 ± 0.20	0.2	1.7
L3/L4	0.63 ± 0.29	0.86 ± 0.24	0.8	1.4	1.7
L4/L5	0.69 ± 0.26	0.93 ± 0.30	0.8	1.0
L5/S1	0.65 ± 0.32	1.00 ± 0.30	0.5	0.9
Disc compression (standing ± 10 % BW-supine) (mm)
L1/L2	0.47 ± 0.49	1.10 ± 0.14
L2/L3	0.54 ± 0.43	1.63 ± 0.14
L3/L4	0.69 ± 0.45	1.16 ± 0.34
L4/L5	0.94 ± 0.30	1.59 ± 0.27
L5/S1	0.90 ± 0.38	1.76 ± 0.30

^aKimura et al. [5] utilized a 50 % BW axial load to simulate upright posture. Data were estimated from their previously published graphs

^bAnterior and posterior disc height data from Lee et al. [6] were averaged to estimate disc height