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).本数据集包含两类内容：1）N=30匹夸特马（Quarter Horse）的基础运动对称性数据。该类基础数据采集自驭马术专用调教场地面的直线快步（trot）训练，以及同一场地上的左、右缰长缰训练（lunge exercise）。2）同批30匹已获取基础对称性数据的夸特马，在徒手牵行训练（in-hand exercise）、长缰训练（lunge exercise）及骑乘训练下的标准化运动对称性数据。运动对称性数据已针对各参数单独完成归一化处理，以满足两项要求：a）直线行进与徒手牵行训练中的运动对称性取值为正；b）依据基础直线徒手牵行训练中观测到的不对称方向，对左、右缰进行重新分类：当马匹以圆周运动内侧肢快步行进时，该侧为「内缰」，且对应不对称参数表明该肢在基础快步的支撑期内发力降低。运动对称性参数涵盖：头部垂直运动的mmHDmin、HDmax、HDup；鬐甲（withers）垂直运动的WDmin、WDmax、WDup；骨盆中部垂直运动的PDmin、PDmax、PDup。其中标注为「min」的参数指单个步周期内垂直运动两个最小值的差值；标注为「max」的参数指两个最大值的差值；标注为「up」的参数指两次向上运动幅度的差值。归一化前的符号规则为：左侧肢发力降低的不对称性取值为负，右侧肢发力降低的不对称性取值为正。数据集标注字段包含：马匹编号（ID）、步态（快步）、地面材质（Soft，软质地面）、训练类型（徒手牵行或骑乘）、缰型（直线、左缰、右缰，或直线、内缰、外缰）、用于计算该值的平均步幅数量（N）、平均步幅时长（单位：毫秒，ms）。