The purpose of this thesis is to investigate the effect of surface gradient and heeled footwear on standing posture. Daily activities are not always performed on horizontal ground and understanding how posture alters in different scenarios is vital in order to know how a specific task is going to affect a person. Under normal conditions a person's standing posture is muscularly efficient; deviation from a normal posture reduces the body's efficiency and increases the rate of muscle fatigue often resulting in discomfort and pain. [Continues.]