Maximum permissible load weight of a Taishuh pony at a trot
Maximum permissible load weight of a Taishuh pony at a trot
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DOI：
10.2527/jas.2012-5540
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发表时间：
2013-08-01
影响因子：
3.3
通讯作者：
Hodate, K.
中科院分区：
文献类型：
--
作者：
Matsuura, A.;Sakuma, S.;Hodate, K.
本研究的目的是通过运动分析系统进行步态分析来确定小跑 Taishuh 小马的负载能力。 7 匹 Taishuh 小马（5 匹母马和 2 匹骟马）和骑手在它们的胸前安装了一个标记（直径 70 毫米），并由 2 台高分辨率数字 DVD 摄像机（采样频率为 60 Hz）记录它们沿着直线小跑的过程。每匹马进行7次测试：1次负载重量为70公斤的测试，5次负载重量在80公斤至120公斤之间的测试，最后一次负载重量为70公斤的测试。使用运动捕捉系统分析每个标记的三维运动。采用最大熵法对标记垂直位移的时间序列进行谱分析，并计算自相关系数。自相关的前 2 个峰值定义为步态的对称性和规律性，对称性和规律性之和定义为稳定性。还进行了互谱分析（Blackman-Tukey 方法）来分析小马和骑手时间序列之间的时间滞后和互相关系数。在小马中，120 kg 测试中的对称性 (0.54) 显着低于第一个 70 kg 测试中的对称性 (0.75，P < 0.05)，100 kg (1.17) 和 120 kg (1.17) 测试中的稳定性显着低于第一个 70 kg 测试中的稳定性 (1.46，P < 0.05)。对于骑手来说，负载重量之间的对称性、规律性和稳定性没有显着差异。 120公斤测试中马和骑手的时间序列之间的时间滞后（47.6毫秒）显着大于第一个70公斤测试中的时间序列（14.3毫秒，P < 0.05）。这些结果表明，太叔小马以3.0 m/s的速度短距离小跑的最大允许负载重量小于100 kg，是体重的43%。
The aim of this study was to determine the loading capacity of a trotting Taishuh pony by gait analysis using a motion analysis system. Seven Taishuh Ponies (5 mares and 2 geldings) and their rider were fitted with a marker (70 mm in diameter placed on their chest) and recorded by 2 high-resolution digital DVD cameras (at a sampling frequency of 60 Hz) as they were trotting along a straight course. Each horse performed 7 tests: 1 test with a loaded weight of 70 kg, 5 tests with random loaded weights between 80 kg and 120 kg, and a final test with a loaded weight of 70 kg again. Three-dimensional movements of each marker were analyzed using motion capture system. The time series of the vertical displacements of the marker was subjected to spectrum analysis by the maximum entropy method, and the autocorrelation coefficient was calculated. The first 2 peaks of the autocorrelation were defined as symmetry and regularity of the gait, and the sum of symmetry and regularity was defined as stability. The cross-spectrum analysis (Blackman-Tukey method) also was performed to analyze the time lag and cross-correlation coefficient between the time series of both pony and rider. Among ponies, symmetry in the 120 kg test (0.54) was significantly lower than that in the first 70 kg test (0.75, P < 0.05) and stabilities in the 100 kg (1.17) and 120 kg (1.17) tests were significantly less than that in the first 70 kg (1.46, P < 0.05). Regarding the rider, there were no significant differences in symmetry, regularity, and stability between loaded weights. The time lag between the time series of horse and rider in the 120 kg test (47.6 ms) was significantly greater than that in the first 70 kg (14.3 ms, P < 0.05) test. These results suggests that the maximum permissible load weight of the Taishuh pony trotting at 3.0 m/s over a short distance was less than 100 kg, which is 43% of the BW.