Normally, when you walk or run, your heel is the first part of your foot to strike the ground. As your body weight shifts to the middle of the foot, the arch of the foot naturally flattens out a bit. This flattening is called pronation. If your feet flatten more than normal, it?s called over-pronation or flat feet. Over-pronation can cause many problems, such as an Achilles tendon injury or heel pain. It may lead to knee problems.
There has been some speculation as to whether arch height has an effect on pronation. After conducting a study at the Rose-Hulman Institute of Technology, Maggie Boozer suggests that people with higher arches tend to pronate to a greater degree. However, the generally accepted view by professionals is that the most pronation is present in those with lower arch heights. To complicate matters, one study done by Hylton Menz at the University of Western Sydney-Macarthur suggests that the methods for measuring arch height and determining whether someone is ?flat-footed? or ?high-arched? are unreliable. He says, ?For this reason, studies investigating the relationship between static arch height motion of the rearfoot have consistently found that such a classification system is a poor predictor of dynamic rearfoot function.
Overpronation can lead to injuries and pain in the foot, ankle, knee, or hip. Overpronation puts extra stress on all the bones in the feet. The repeated stress on the knees, shins, thighs, and pelvis puts additional stress on the muscles, tendons, and ligaments of the lower leg. This can put the knee, hip, and back out of alignment, and it can become very painful.
When sitting, an over-pronating foot appears quite normal, i.e. showing a normal arch with room under the underside of the foot. The moment you get up and put weight on your feet the situation changes: the arches lower and the ankle slightly turns inwards. When you walk or run more weight is placed on the feet compared to standing and over-pronation will become more evident. When walking barefoot on tiles or timber floors over-pronation is more visible, compared to walking on carpet or grass.
Non Surgical Treatment
The following exercises help retrain the foot and ankle complex to correct overpronation. Step Up and Over. This exercise is designed to integrate skills learned in the Duck Stand, Big Toe Pushdowns and Side Step with Opposite Reach exercises to mimic walking and even running. Using the gluteal muscles and big toe in tandem will prevent overpronation while moving back and forth over the BT in a more effective, balanced motion. Movement Directions. Stand with left foot on top of the BT dome. (Note: For added balance, the right foot can tap on the ground, if needed). Extend right foot backwards to the ground and drop hips into a lunge position. Make sure that the right arm rotates across the left leg (this will activate the gluteal muscles on the left side). Now, step through and over the BT into a front lunge with the right leg forward. While lunging forward, the torso and left arm now rotate over the right leg. Throughout the exercise, push big toe down into the BT. Perform 8 to 10 repetitions on both sides.
Many of the prevention methods for overpronation-orthotics, for example-can be used interchangeably with treatment methods. If the overpronation is severe, you should seek medical attention from a podiatrist who can cast you for custom-made orthotics. Custom-made orthotics are more expensive, but they last longer and provide support, stability, and balance for the entire foot. You can also talk with a shoe specialist about running shoes that offer extra medial support and firm heel counters. Proper shoes can improve symptoms quickly and prevent them from recurring. Surgery can sometimes help cure and prevent this problem if you suffer from inherited or acquired pes planus deformity. Surgery typically involves stabilizing the bones to improve the foot?s support and function.