Reynolds T R
Am J Phys Anthropol. 1987 Jan;72(1):101-15. doi: 10.1002/ajpa.1330720113.
Primate stride lengths during quadrupedal locomotion are very long when compared to those of nonprimate quadrupedal mammals at the speed of trot/gallop transition. These exceptional lengths are a consequence of the relatively long limbs of primates and the large angular excursions of their limbs during quadrupedalism. When quadrupedal primates employ bipedal gaits they exhibit much lower angular excursions. Consequently their bipedal stride lengths do not appear to be exceptional in length when compared to other mammals. Angular excursions of the lower limbs of modern humans are not exceptionally large. However, when running, humans exhibit relatively long periods of flight (i.e., they have low duty factors) when compared to other mammals including primates. Because of these long periods of flight and their relative long lower limbs, humans have running stride lengths that are at the lower end of the range of stride lengths of quadrupedal primates. The stride length of the Laetoli hominid trails are evaluated in this context.
与非灵长类四足哺乳动物相比，灵长类在小跑/疾驰转换速度下的四足运动步幅非常长。这些超长步幅是灵长类相对较长的四肢以及它们在四足行走时四肢较大的角位移的结果。当四足灵长类动物采用双足步态时，它们的角位移要小得多。因此，与其他哺乳动物相比，它们的双足步幅在长度上似乎并不突出。现代人类下肢的角位移并不大。然而，与包括灵长类在内的其他哺乳动物相比，人类在奔跑时表现出相对较长的腾空期（即，他们的步频较低）。由于这些较长的腾空期以及他们相对较长的下肢，人类的跑步步幅处于四足灵长类动物步幅范围的下限。在此背景下对莱托利古人类足迹的步幅进行了评估。
