Validation of vertical ground reaction forces on individual limbs calculated from kinematics of horse locomotion
Validation of vertical ground reaction forces on individual limbs calculated from kinematics of horse locomotion
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DOI：
10.1242/jeb.02774
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发表时间：
2007-06-01
影响因子：
2.8
通讯作者：
Weishaupt, Michael A.
中科院分区：
文献类型：
--
作者：
Bobbert, Maarten F.;Gomez Alvarez, Constanza B.;Weishaupt, Michael A.
本研究的目的是确定是否可以准确地计算单个肢体的力量，从运动学的小跑和步行的马。我们收集了运动学数据，并测量了7匹温血盛装舞步马的单个肢体上的垂直地面反作用力，在跑步机上以3.4 m s（-1）的速度小跑，以1.6 m s（-1）的速度行走。首先，使用节段模型，我们从运动学计算出总地面反作用力矢量及其相对于每个蹄的力臂。其次，对于仅由两个肢体支撑身体的阶段，我们计算了这些肢体上的各个反作用力。第三，我们假设远端肢体的线性弹簧，并确定他们的力长度关系，使用计算的个别肢体的力量小跑。最后，我们计算了个别肢体力-时间的历史，从远端肢体长度。一个很好的对应关系，得到计算和测量的个人肢体力量。小跑时，前肢上的平均峰值垂直反作用力计算值为11.5 +/- 0.9 N kg（-1），测量值为11.7 +/- 0.9 N kg（-1），后肢上的这些值分别为9.8 +/- 0.7 N kg（-1）和10.0 +/- 0.6 N kg（-1）。行走时，前肢的平均峰值垂直反作用力计算值为6.9 +/- 0.5 N kg（-1），测量值为7.1 +/- 0.3 N kg（-1），后肢的这些值分别为4.8 +/- 0.5 N kg（-1）和4.7 +/- 0.3 N kg（-1）。得出的结论是，所提出的方法计算个人肢体反作用力是足够准确的检测轻中度跛行小跑文献中报道的负载变化。
The purpose of this study was to determine whether individual limb forces could be calculated accurately from kinematics of trotting and walking horses. We collected kinematic data and measured vertical ground reaction forces on the individual limbs of seven Warmblood dressage horses, trotting at 3.4 m s(-1) and walking at 1.6 m s(-1) on a treadmill. First, using a segmental model, we calculated from kinematics the total ground reaction force vector and its moment arm relative to each of the hoofs. Second, for phases in which the body was supported by only two limbs, we calculated the individual reaction forces on these limbs. Third, we assumed that the distal limbs operated as linear springs, and determined their force-length relationships using calculated individual limb forces at trot. Finally, we calculated individual limb force-time histories from distal limb lengths. A good correspondence was obtained between calculated and measured individual limb forces. At trot, the average peak vertical reaction force on the forelimb was calculated to be 11.5 +/- 0.9 N kg(-1) and measured to be 11.7 +/- 0.9 N kg(-1), and for the hindlimb these values were 9.8 +/- 0.7 N kg(-1) and 10.0 +/- 0.6 N kg(-1), respectively. At walk, the average peak vertical reaction force on the forelimb was calculated to be 6.9 +/- 0.5 N kg(-1) and measured to be 7.1 +/- 0.3 N kg(-1), and for the hindlimb these values were 4.8 +/- 0.5 N kg(-1) and 4.7 +/- 0.3 N kg(-1), respectively. It was concluded that the proposed method of calculating individual limb reaction forces is sufficiently accurate to detect changes in loading reported in the literature for mild to moderate lameness at trot.