Table 5.

Statistical comparison of scaled hind limb muscle moment arm lengths, muscle fascicle length to moment arm ratios and maximum moments of force in the Quarter Horse and Arab.

		MA lengths	MFL : MA	MMF
Muscle	Joint	P value	P value	P value
Gluteus medius L1	Hip	0.476	0.363	0.728
Gluteus medius L2	Hip	0.154	0.293	0.410
Gluteus medius L3	Hip	0.595	0.925	0.618
Gluteus medius L4	Hip	0.442	0.742	0.799
Gluteus medius L5	Hip	0.360	0.698	0.445
Biceps femoris	Hip	**0.041	**0.047	0.592
Semitendinosus	Hip	0.389	0.261	0.196
Biceps femoris (vertebral head)	Stifle	0.445	0.357	0.375
Biceps femoris (intermediate head)	Stifle	0.194	0.521	0.427
Biceps femoris (caudal head)	Stifle	0.711	0.195	0.343
Semitendinosus	Stifle	0.343	0.272	0.865
Vastus lateralis	Stifle	0.532	0.713	0.945
Gastrocnemius lateralis	Stifle	**0.003	0.549	0.751
Gastrocnemius medialis	Stifle	0.228	0.157	0.349
Gastrocnemius	Tarsus	1.00	1.00	**0.041
Tibialis cranialis	Tarsus	0.073	0.804	0.090

MA lengths, muscle moment arm lengths; MFL : MA, muscle fascicle length to moment arm ratios; MMF, maximum moments of force.

Significance level set at P = 0.05.

^**Indicates a significant difference.