The mechanical properties of foot orthotics help to ensure the correct positioning of the bones in the feet, ankles, and knees. The muscles and ligaments leading up to the hips and holding the leg bones in place are prevented from stretching over time, which can lead to further injury and aggravation.
Foot orthotics can also reduce muscular fatigue and may help to promote more efficient muscle performance. Many biomechanical problems related to the feet are caused by plastic deformation- which occurs when connective tissue is placed under repetitive or constant stress. The connective tissue may slowly stretch over time. Increases in tissue length can cause greater bone instability in the foot and lead to issues such as over-pronation, or fallen arches.
People who are active in sports may find that custom orthotics help to increase endurance, strength and performance abilities. Individuals who are overweight may find that orthotics relieve the additional stress of extra weight off the ligaments in their feet and legs. The use of orthotics can help some people to avoid or prolong having surgery.