Fig. 5

Box-and-whisker plots of lower extremities muscle strength showing the percentage change from baseline for four groups at pretest and posttest. The box’s width represents the interquartile range, the horizontal line within the boxes represents the median, the upper and below whiskers represent the minimum and maximum values. (*, ** and ***represent significant difference between groups at < 0.05, < 0.01 and < 0.001, respectively)