Extended Data Figure 7: Locomotor performance based on stride parameters.

This is the same as Fig. 3, but the ratios compare the two predators and the two prey species. All values are averaged per stride or represent the change over a stride. a–e, Acceleration. a, Positive net work performed in each stride. b, Stride frequency. c, Stride power. d, Increase in speed per stride. e, Forward acceleration with the curved lines representing a mean power of 30, 60, 90, 120 and 150 W. f–j, Deceleration. f–j, As a–e but for decelerating strides. k–n, Turning. k, Centripetal acceleration. l, The relationship between speed and turn radius with limit lines for a coefficient of friction (μ) of 0.6 and 1.3. m, Change in heading versus speed. n, Lateral versus tangential acceleration with limits as for μ. In n, F represents pure forward acceleration; B, deceleration; and C, acceleration to the side. In each panel, there is one line per species that represents the 98th percentile for data in speed bins (bins always include 400 data points, therefore bin width varies). Cheetah, blue; impala, red; lion, purple; zebra, yellow. Bottom, the ratio of that parameter for cheetah to lion (green circle) and impala to zebra (magenta circle) is given for each speed bin.