The Company of Biologists

Table 1.

Duty factors and gait statistics for flat and rough terrain running

	Duty factor			P-values for Flat vs Rough terrain (t-tests)
Leg^{^*}	Flat terrain	Rough terrain	Duty factor	Stance initiation phase	Swing initiation phase
FL	0.51±0.01	0.54±0.02	0.454	0.409	0.079
FR	0.53±0.01	0.54±0.02	0.974	0.112	0.318
ML	0.60±0.01	0.61±0.02	0.602	0.456	0.346
MR	0.58±0.01	0.58±0.02	0.904	0.487	0.998
HL	0.50±0.01	0.52±0.03	0.130	N/A^{^†}	0.130
HR	0.50±0.01	0.50±0.03	0.437	0.348	0.056

	Duty factor			P-values for Flat vs Rough terrain (t-tests)
Leg^{^*}	Flat terrain	Rough terrain	Duty factor	Stance initiation phase	Swing initiation phase
FL	0.51±0.01	0.54±0.02	0.454	0.409	0.079
FR	0.53±0.01	0.54±0.02	0.974	0.112	0.318
ML	0.60±0.01	0.61±0.02	0.602	0.456	0.346
MR	0.58±0.01	0.58±0.02	0.904	0.487	0.998
HL	0.50±0.01	0.52±0.03	0.130	N/A^{^†}	0.130
HR	0.50±0.01	0.50±0.03	0.437	0.348	0.056

Values are means ± s.e.m.

FL, front left; FR, front right; ML, middle left; MR, middle right; HL,hind left; HR, hind right

Since hind left leg stance initiation defines a phase of zero there can be no comparison