Biomechanic characteristics of gait of four breeds of dogs with different conformations at walk on a treadmill

Figures & data

Figure 1. Frame obtained from the high-speed video camera. Note the retroflective markers positioned over anatomic references.

Table 1. Mean ± SD of kinetic and kinematic values of four groups of dogs: Canarian warren hound (War), beagle (Bea), German shepherd (Gsh) and Belgian shepherd (Bsh).

	War	Bea	Gsh	Bsh
BW (%)	61.26 ± 3.89	63.85 ± 4.31	32.31 ± 5.9	53.48 ± 3.00
ST	0.64 ± 0.03	0.45 ± 0.01	0.66 ± 0.03	0.50 ± 0.01
ST (%)	57.80 ± 3.30	57.75 ± 5.14	61.49 ± 1.02	53.17 ± 1.50
SwT (%)	42.19 ± 3.30	44.25 ± 5.02	38.50 ± 1.00	46.83 ± 1.50
SL	40.25 ± 1.81	21.35 ± 1.71	49.69 ± 2.90	35.15 ± 0.79
SL/BL (%)	87.36 ± 4.44	39.54 ± 3.55	68.04 ± 4.47	54.91 ± 1.38
SL/WH (%)	74.54 ± 3.75	47.44 ± 4.27	74.16 ± 4.84	61.66 ± 1.55
hip ROM	79.20 ± 9.25	40.20 ± 4.02	47.20 ± 2.38	41.80 ± 1.09
knee ROM	36.60 ± 5.41	44.80 ± 4.32	48.00 ± 5.83	46.00 ± 5.19
tarsal ROM	18.20 ± 3.63	9.20 ± 7.29	12.80 ± 6.94	20.40 ± 5.36

Note: % body weight (BW) was calculated with weight and force expressed in Newtons (N/N); time in seconds; length and height in centimetres; angles in degrees.

Table 2. Resultant p values from the comparison of kinetic and kinematic parameters between the four studied breeds.

	War	Bea	Gsh	Bsh		War	Bea	Gsh	Bsh
BW (%)					ST
War
Bea	0.087					0.04
Gsh	0.00	0.00				0.88	0.01
Bsh	0.00	0.00	0.00			0.00	0.00	0.00
SL					ST (%)
War
Bea	0.00					0.99
Gsh	0.00	0.00				0.30	0.26
Bsh	0.00	0.00	0.00			0.12	0.14	0.00
SwT (%)					SL/BL (%)
War
Bea	0.67					0.00
Gsh	0.30	0.04				0.00	0.00
Bsh	0.11	0.58	0.00			0.00	0.00	0.00
SL/WH (%)					Hip ROM
War
Bea	0.00					0.00
Gsh	0.99	0.00				0.00	0.01
Bsh	0.00	0.00	0.00			0.00	0.396	0.01
Knee ROM					Tar ROM
War
Bea	0.88					0.69
Gsh	0.71	0.73				0.57	0.99
Bsh	0.91	0.87	0.69			0.93	0.48	0.83

Note: Numbers in italics means statistical significant difference.

Figure 2. Box plots showing % body weight (BW) of the four breeds (Canarian warren hound, beagle, German shepherd and Belgian shepherd) of dogs. The plots show the median (line within box), 25th and 75th percentiles (box), minimum and maximum values (whiskers).

Figure 3. Box plots showing temporal and linear kinematic values of the four breeds (Canarian warren hound, beagle, German shepherd and Belgian shepherd) of dogs. The plots show the median (line within box), 25th and 75th percentiles (box), minimum and maximum values (whiskers).

Figure 4. Box plots showing angular kinematic values of the four breeds (Canarian warren hound, beagle, German shepherd and Belgian shepherd) of dogs. The plots show the median (line within box), 25th and 75th percentiles (box), minimum and maximum values (whiskers).