Fig 1.
Our method for identification and evaluation of fatigue indicators.
Fig 2.
Order of the tasks for horses to perform a SET.
Fig 3.
IMUs locations and orientations on horse body.
Table 1.
Number, age (in years), and plasma lactate concentration (post-SET and the maximum value during SET) of horses by datasets.
Table 2.
Extracted features from strides.
Table 3.
Features (mean and variability) with highest weight value based on different subsets, the best performing variability, the average performance results of the SVM classification models from leave-one-subject-out cross validation (reported as mean ± standard deviation), and the number of strides per subset.
Fig 4.
Comparison of biomechanical features of all horses between pre- and post-SET during walk and trot.
The vertical axes of all plots represents the range-normalized value of the feature. The box represents the interquartile range, while the red line (horizontal line within the box) shows the median value. Each box (two for each plot) consists of one value per horse, which was averaged from all strides of the horse.
Fig 5.
Number of horses with increased/decreased (in percentage) features values in post-SET compare to pre-SET.
The vertical axes of all plots represents the range of increase (if positive) or decrease (if negative) of the specified feature value. Each bar represents the number of horses that have an increase or decrease of value within the specified range. Each plot consists of one value per horse, which was averaged from all strides of the horse.
Fig 6.
Comparison of biomechanical features between low and high intensity SETs (datasets 2 and 3) during walk and trot.
The vertical axis represents the increase/decrease percentage of feature value during post-SET compared to pre-SET. The box represents the interquartile range, while the red line (horizontal line within the box) shows the median value. Each box (two for each plot) consists of one value per horse, which was averaged from all strides of the horse.
Fig 7.
Comparison of speed and stride, stance, and swing duration features of all horses between pre- and post-SET during walk.
The vertical axes of all plots represents the range-normalized value. The box represents the interquartile range, while the red line (horizontal line within the box) shows the median value. Each box (two for each plot) consists of one value per horse, which was averaged from all strides of the horse.
Fig 8.
Comparison of speed and stride, stance, and swing duration features of all horses between pre- and post-SET during trot.
The vertical axes of all plots represents the range-normalized value. The box represents the interquartile range, while the red line (horizontal line within the box) shows the median value. Each box (two for each plot) consists of one value per horse, which was averaged from all strides of the horse.
Fig 9.
Comparison of biomechanical features between low and high intensity SETs (datasets 2 and 3) during walk and trot.
The vertical axis represents the increase/decrease percentage of feature value during post-SET compared to pre-SET. The box represents the interquartile range, while the red line (horizontal line within the box) shows the median value. Each box (two for each plot) consists of one value per horse, which was averaged from all strides of the horse.