This study aimed to determine the load-bearing capacity of trotting Kiso horses using gait analysis. Ten Kiso horses with a height at withers of 128 cm were included. Their riders were fitted with a marker (70 mm in diameter placed on their chest) recorded by two digital DVD cameras while trotting along a short, straight course. In total, eight tests were performed for each horse: the first with a 70 kg load; six with randomly loaded weights ranging 80-130 kg; and then a final test again with a 70 kg load. Three-dimensional movement of the marker was analyzed using a motion capture system. The time series of vertical displacement of the marker underwent spectrum analysis by the maximum entropy method, and the autocorrelation coefficient was calculated. The first two peaks of the autocorrelation were defined as symmetry and regularity, and their sum was defined as stability. Regularity in the 120 kg test (0.54) was lower than that in the first 70 kg test (0.61), and stability in the 120 kg test (1.31) was lower than that in the first 70 kg test (1.42). We concluded that the maximum permissible load for a trotting Kiso horse is < 120 kg, which represents 31% of its bodyweight.

中文翻译：

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木曾马在短短直道上小跑的最大允许负荷。

本研究旨在通过步态分析确定小跑木曾马的承重能力。包括十只高度为128厘米的木曾马。他们的骑手装备了一个记号笔（直径70毫米，放置在他们的胸口），该记号笔由两台数字DVD摄像机记录，同时沿一条短而直线的小跑小跑。总共对每匹马进行了八项测试：第一项负载70公斤；六只，随机装载的重量在80-130公斤之间；然后再进行70公斤负载的最终测试。使用运动捕获系统分析了标记的三维运动。用最大熵法对标记物的垂直位移的时间序列进行频谱分析，计算出自相关系数。自相关的前两个峰定义为对称性和规则性，他们的总和被定义为稳定性。120公斤测试的规则性（0.54）低于前70公斤测试的规则性（0.61），而120公斤测试的稳定性（1.31）低于前70公斤测试的稳定性（1.42）。我们得出的结论是，小跑Kiso马的最大允许负载为<120公斤，占其体重的31％。