Fig. 9. (A) Total contact duration, flight duration and limb overlap duration as a function of speed. Values are means ± s.d. of individual horse mean data. Quadratic lines of best fit (P<0.000) are shown for the population. These were calculated using mean data. Coefficients: contact: b₀=633.89, b₁=-41.187 and b₂=1.302; flight: b₀=-55.25, b₁=34.405 and b₂=-1.4337; overlap: b₀=395.43, b₁=-26.42 and b₂=0.2757. (B) Contact, flight and limb overlap as a percentage of total stride duration as a function of speed. Quadratic lines of best fit (P<0.000) are shown for the population. These were estimated using mean data. Coefficients: contact: b₀=117.12, b₁=-7.5431 and b₂=0.2901; flight: b₀=-17.116, b₁=7.5431 and b₂=-0.2901; overlap: b₀=65.381, b₁=-3.1195 and b₂=-0.0215.