TABLE 2.

Median R² values

Subject	RIG1	RIG4	SR	SI	SRI
S1	0.99	0.99	0.98	0.83†*	0.61†*
S2	0.93	0.95	0.97†	0.93	0.94
S3	0.32	0.90	0.44*	0.17*	0.61*
S4	0.94	0.98	0.91*	0.94	0.56†*
S5	0.96	0.96	0.94	0.98*	0.96*
S6	0.38	0.90	0.91†	0.81	0.64*

Median R² values are shown for each subject from regression of FZ onto FY during the load phase. Kolmogorov–Smirnov test was used to compare the R² distributions between rigid and nonrigid conditions. Significantly different

^†(P < 0.05) from RIG1 or

^*RIG4.