Figure 6
From: Mallard hindlimbs locomotion system respond to changes in sandy ground hardness and slope
Instantaneous joint angles of the hip on natural flat sand ground, natural uphill sand ground, and hard uphill sand ground. (A) At touch-down; (B) at mid-stance; (C) at lift-off; (D) at mid-swing. Each operating condition involved the analysis of 24 stride cycles. The box plot shows the median, upper and lower quartiles, and highest and lowest values. A hollow rectangle indicates the horizontal mean, and a solid diamond represents outliers. Significant differences identified via Bonferroni's test are indicated with asterisks (p < 0.05).
