Quarter Horse Movement Symmetry Data

Data sets comprising:1) baseline movement symmetry data of N=30 Quarter horses. Baseline data are from straight-line, in0hand trotups on reining purpose arena surface and from left and right rein lunge exercise on the same surface..2) normalized movement symmetry data from in-hand, lunge and ridden exercise of the same N=30 horses for which baseline symmetry data are available. Movement symmetry data are normalized (for each parameter separately) so that a) a positive value for movement symmetry is observed for straight-line, in-hand exercise and b) left and right reins are recategorized with respect to the direction of asymmetry seen during the baseline, straight-line, in-hand exercise, such that an 'inside rein' is when the horse is trotting with the limb on the inside of the circle and the corresponding asymmetry parameter indicates a reduction in force production during the stance phase of said limb during the baseline trot.Movement symmetry parameters are:in mmHDmin, HDmax, HDup for vertical head movementWDmin, WDmax, WDup for vertical withers movementPDmin, PDmax, PDup for vertical mid-pelvic movement.Parameters labelled 'min' indicate the differences between the two minima in vertical movement over a stride cycle.Labelled with 'max': differences between the maxima.Labelled with 'up': differences between the upward movement amplitudes.Sign convention before normalization: asymmetries indicating a reduction in force with the left limb have negative values, indicating a reduction in force with the right limb have positive values.Data are labelled with respect to the horse (ID), the Gait (trot), the Surface (Soft), whether the values was taken during in-hand or ridden exercise, the rein (either straight, left, right or straight, inside, outside), the numbers of strides averaged to calculate the value (N), the average stride time (in ms).

本数据集包含两部分内容：1）N=30匹夸特马（Quarter Horse）的基线运动对称性数据。基线数据采集于驭马术专用场地表面上的直线牵行慢跑，以及同一表面上的左右缰打圈训练。2）同批N=30匹已获取基线对称性数据的夸特马，其经标准化处理的运动对称性数据，采集场景涵盖牵行、打圈及骑乘三种训练方式。运动对称性数据已针对每个参数单独进行归一化处理，具体规则为：a）直线牵行运动的对称性取值为正；b）依据基线直线牵行运动中观测到的不对称方向，对左右缰训练场景进行重新分类：当马匹在圆周运动中某侧肢体处于圆周内侧时，该侧缰位即为"内缰"，此时对应的不对称参数表示，在基线慢跑过程中，该肢体支撑阶段的肌力生成量有所降低。运动对称性参数包括：用于表征头部垂直运动的mmHDmin、HDmax、HDup；用于表征鬐甲（withers）垂直运动的WDmin、WDmax、WDup；用于表征骨盆中部垂直运动的PDmin、PDmax、PDup。其中标注为"min"的参数代表一个步周期内两次垂直运动最小值之间的差值；标注为"max"的参数代表两次最大值之间的差值；标注为"up"的参数代表两次向上运动幅度之间的差值。归一化前的符号约定为：左侧肢体肌力降低的不对称性取值为负，右侧肢体肌力降低的不对称性取值为正。数据集的标注项包括：马匹编号（ID）、步态（慢步（trot））、场地表面类型（Soft）、训练方式（牵行或骑乘）、缰位类型（直线、左缰、右缰，或直线、内缰、外缰）、用于计算该指标的平均步幅数量（N）、平均步幅时长（单位：毫秒（ms））。