You may not immediately think of knee pain as being related to a problem with your feet but poor foot function can be a factor that causes pain further up the body, in joints such as the knees, hips and lower back.
The most common cause of knee pain related to the feet is excessive foot flattening or rotation, which can force the knee to roll inwards in an abnormal position.
Various factors can cause overuse injuries to the knee, including poor footwear, inappropriate training programs and inadequate training surfaces (eg. bitumen or soft sand). Another major cause is abnormal alignment of the foot and lower leg.