Stride-to-stride variability while backward counting among healthy young adults

Table 2 F test and P-value of ANCOVA with a repeated measures (n = 98) design comparing mean value of stride time while walking at self-selected speed with and without backward counting, adjusted for walking speed (covariate) and subject effect (n = 49).

Source of variation	Sum of square	df^\|\|	Mean square	F	P-value
Backward counting*	0.001	1	0.0008	1.50	0.227 †
Subjects ‡	0.431	48	0.0090	17.71	0.000
Log (Stride velocity) §	0.124	1	0.1242	244.80	0.000
Residual	0.024	47	0.0005
Total	1.008	97	0.0104

*: Backward counting coded as a binary variable (0 = walking alone, 1 = walking with backward counting), †: Box conservative estimate, ‡: Variability between subjects §: Normalized by taking the logarithmic transformation, ||: Degree of freedom

ISSN: 1743-0003