Table 4.

Allometric equations relating relative stride length and duty factor to body mass in horses trotting at equal Froude number

95% CL
Froude numberabLowerUpperMAPD (%)
RSL
Including horses 18-21
0.501.430.00−0.040.033.7
0.751.490.01−0.020.043.3
1.001.660.01−0.010.043.1
Excluding horses 18-21
0.501.300.01−0.040.073.4
0.751.370.03−0.030.083.2
1.001.610.02−0.030.073.1
DF
Including horses 18-21
0.500.470.00−0.030.032.5
0.750.44−0.01−0.040.033.5
1.000.390.00−0.030.043.7
Excluding horses 18-21
0.500.410.02−0.030.082.5
0.750.380.02−0.040.083.5
1.000.320.04−0.020.103.2
  • RSL, relative stride length; DF, duty factor.

    Equations of the form: RSL or DF=aMbb, where Mb is body mass in kg.

    CL, confidence limits for the scaling exponent, b.

    MAPD: mean absolute percent deviation of measured values from the fitted relationship.

    Relationships are given both including and excluding data for horses 18-21.