We have studied the effects of ankle arthrodesis on the gait of three subjects with special attention to the time and sagittal plane kinematic and kinetic characteristics. Each subject had a painless arthrodesis and no other gait limitation. To compensate for this disability they showed an increased range of movement at the ipsilateral mid-tarsal, knee and hip joints, and required greater than normal resuftan joint moments to be generated at the ipsilateral knee and hip joints. The subjects exhibited stride-to-stride kinetic compensation at the knee and hip joints, with associated variability in resultant joint moments and power patterns. However, they achieved a symmetric gait by mimicking ipsilateral movements with the opposite limb.