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).本数据集涵盖两部分内容： 1) 30匹夸特马（Quarter Horse）的基础运动对称性数据。基础数据采集自驭马术专用场地表面的直线徒手快步（in-hand trot），以及同一表面上左右缰圈驭训练（lunge exercise）的相关数据。 2) 针对上述已获取基础运动对称性数据的30匹夸特马，采集其徒手、圈驭及骑乘状态下的标准化运动对称性数据。运动对称性数据已针对每个参数单独完成标准化处理，以满足两项规则： a) 直线徒手运动状态下的运动对称性数值为正； b) 左右缰将根据基础直线徒手运动中观测到的不对称方向重新分类：当马匹快步时，若某侧肢体处于圆环内侧，则该侧为「内缰（inside rein）」，且对应的不对称参数表示在基础快步过程中，该肢体支撑阶段的力量生成能力出现下降。 运动对称性参数包括： - 垂直头部运动参数：mmHDmin、HDmax、HDup； - 垂直肩隆（withers）运动参数：WDmin、WDmax、WDup； - 垂直骨盆中部运动参数：PDmin、PDmax、PDup。 标注为「min」的参数表示单个步周期内垂直运动的两个极小值之差；标注为「max」的参数表示两个极大值之差；标注为「up」的参数表示向上运动幅度之差。 归一化前的符号约定：左侧肢体力量下降对应的不对称性数值为负，右侧肢体力量下降对应的不对称性数值为正。 数据将通过以下维度进行标识：马匹编号（ID）、步态（快步（trot））、场地表面类型（软质（Soft））、运动状态（徒手或骑乘）、缰侧类型（直线、左缰、右缰，或直线、内缰、外缰）、用于计算均值的步幅数量（N）、平均步幅时间（单位：毫秒（ms））。