Movie 1.

Illustration of the combined measurements of whole-body kinematics and muscle activity for the transition to upward walking. (Top row) Raw EMG recordings from antagonistic hind leg muscles retractor (Ret) and protractor (Pro). (Left panel) 3D motion-capture-based schematic animation of a stick insect walking freely along a walkway with a step-change in slope from level to +45° upward walking. (Right panel) Complementary, synchronized side-view video used for visual validation and movement annotation.