Table 1.

Subject demographics, and target and resultant gait parameters, by group.

Group	N	Female	Age (yrs) Mean (SD)	Height (m) Mean (SD)	Weight (kg) Mean (SD)	Target Step Length (/bh)	Resultant Step Length (/bh) Mean (SD)	Target Gait Speed*	Resultant Gait Speed* Mean (SD)
A	19	8	28.9 (6.9)	1.7 (0.1)	69.2 (14.9)	0.434	.433 (.035)	0.4**	.396 (.039)
B	18	11	24.3 (4.9)	1.7 (0.1)	65.4 (13.5)	0.301	.309 (.027)	0.2	.203 (.017)
C	20	14	24.9 (5.1)	1.7 (0.2)	68.0 (12.6)	0.434	.422 (.027)	0.2	.204 (.013)

^*This is a dimensionless measure: sacral velocity normalized by $\sqrt{\mathit{\text{g}}\ast \mathit{\text{bh}}}$ where g is the acceleration due to gravity and bh is the subject's body height.

^**Target for the initial 8 subjects was 0.47; analysis revealed that the subjects could not consistently reach this target, so the target was adjusted to 0.4 for the remaining 11 subjects.