This research evaluated an innovative way of communicating and understanding the complexity of older people’s mobility problems using visualisations of objective dynamic movement data. In previous research, a prototype software tool was created, which visualises, for non-biomechanical specialists and lay audiences, dynamic biomechanical data captured from older people undertaking activities of daily living. From motion capture data and muscle strength measurements, a 3D animated human ‘stick figure’ was generated,on which the biomechanical demands of the activities were represented visually at the joints (represented as a percentage of maximum capability, using a continuous colour gradient from green at 0%, amber at 50% through to red at 100%). The potential healthcare and design applications for the visualisations were evaluated through a series of interviews and focus groups with older people, and healthcare and design professionals, and through a specialist workshop for professionals.