Heglund N C, Taylor C R, McMahon T A
Science. 1974 Dec 20;186(4169):1112-3. doi: 10.1126/science.186.4169.1112.
The stride frequency at which animals of different size change from one gait to another (walk, trot, gallop) changes in a regular manner with body mass. The speed at the transition from trot to gallop can be used as an equivalent speed for comparing animals of different size. This transition point occurs at lower speeds and higher stride frequencies in smaller animals. Plotting stride frequency at the trot-gallop transition point as a function of body mass in logarithmic coordinates yields a straight line.
不同大小的动物从一种步态（行走、小跑、疾驰）转变为另一种步态时的步频会随着体重有规律地变化。从小跑转变为疾驰时的速度可作为一个等效速度，用于比较不同大小的动物。在较小的动物中，这种转变点出现在较低的速度和较高的步频下。在对数坐标中，将小跑 - 疾驰转变点处的步频作为体重的函数进行绘图，会得到一条直线。
