Table 5.

The narrow walkway (experiment 2): a stride lengthened during negotiation of the obstacle

	Stride Length, cm		Stride Height, cm		Stride Duration, s		Swing Duration, s		Swing Proportion in Stride, %		Swing Velocity, m/s
Cat	Unobst	Obst	Unobst	Obst	Unobst	Obst	Unobst	Obst	Unobst	Obst	Unobst	Obst	Paw-to-Obstacle Distance, cm
MI
1	50 ± 1.7	54 ± 0.3	3.5 ± 0.2	5.6 ± 0.1	0.65 ± 0.03	0.66 ± 0.02	0.31 ± 0.02	0.33 ± 0.01	50 ± 3	50 ± 1	1.6 ± 0.1	1.7 ± 0.1	2.6 ± 0.1
2	46 ± 2.6	52 ± 1.3	3.6 ± 0.3	6.1 ± 0.5	0.65 ± 0.03	0.73 ± 0.06	0.29 ± 0.02	0.35 ± 0.03	45 ± 2	47 ± 2	1.6 ± 0.1	1.5 ± 0.1	5.3 ± 2.1
SF
1	44 ± 1.1	48 ± 1.0	4.0 ± 0.5	5.3 ± 0.8	0.74 ± 0.04	0.72 ± 0.06	0.31 ± 0.02	0.31 ± 0.02	43 ± 2	44 ± 2	1.4 ± 0.1	1.5 ± 0.1	2.3 ± 0.3
2	38 ± 3.6	42 ± 2.3	2.1 ± 0.2	3.0 ± 0.6	0.85 ± 0.04	0.80 ± 0.06	0.35 ± 0.02	0.33 ± 0.01	40 ± 3	40 ± 2	1.1 ± 0.1	1.2 ± 0.2	2.6 ± 0.3
TI
1	50 ± 1.4	55 ± 1.5	2.7 ± 0.3	4.5 ± 0.1	0.71 ± 0.02	0.67 ± 0.03	0.32 ± 0.01	0.32 ± 0.02	45 ± 1	48 ± 1	1.6 ± 0.1	1.7 ± 0.1	7.7 ± 0.6
2	50 ± 1.7	56 ± 1.6	3.4 ± 0.3	5.0 ± 0.1	0.72 ± 0.02	0.73 ± 0.02	0.33 ± 0.01	0.35 ± 0.02	46 ± 1	48 ± 1	1.5 ± 0.1	1.6 ± 0.1	6.1 ± 0.8

Values are means ± SD for each cat for numbered sessions as indicated. Obst, a stride that negotiated the obstacle; Unobst, a corresponding stride of unobstructed walking. Pairs of categories that were different (P < 0.05, t-test) are in bold.