Fig. 7. Single leg peak GRFs of one step measured when only one foot was on the force platform. Red lines and bars represent normal forces, whereas blue lines and bars represent fore–aft forces. Values are means ± s.e.m. (A) Forefoot GRF tracing from a single individual. (B) Hindfoot GRF tracing from a single individual. (C) Mean peak forefoot GRF magnitudes and phases (N=10). (D) Mean peak hindfoot GRF magnitudes and phases (N=14). Fore- and hindfeet both produce positive normal forces, showing geckos did not exert any detachment force.