Fig. 2

a Predicted relationship between \({\dot{\text{V}}\text{O}}_{2}\) (ml min⁻¹) and DBA (g) while pygmy goats were walking on a treadmill at three different slopes; level (0°), negative slope (–15°), and positive slope (+ 15°). The shaded area shows the 95% confidence interval. b The correlation between DBA (g) and walking speed (km s⁻¹), while goats are walking on a treadmill at different speeds and different slopes