Achilles Tendonitis

Achilles tendonitis, also sometimes called Achilles tendinitis, is a painful and often debilitating inflammation of the Achilles tendon (heel cord). The Achilles tendon is the largest and strongest tendon in the body. It is located in the back of the lower leg, attaches to the heel bone (calcaneus), and connects the leg muscles to the foot.

The Achilles tendon gives us the ability to rise up on our toes, facilitating the act of walking, and Achilles tendonitis can make walking almost impossible.

There are three stages of tendon inflammation:

Peritenonitis is characterized by localized pain during or following activity. As this condition progresses, pain often develops earlier on during activity, with decreased activity, or while at rest.

Tendinosis is a degenerative condition that usually does not produce symptoms (i.e., is asymptomatic). It may cause swelling or a hard knot of tissue (nodule) on the back of the leg.

Peritenonitis with tendinosis results in pain and swelling with activity. As this condition progresses, partial or complete tendon rupture may occur.

Arch Pain

The term arch pain (often referred to as arch strain) refers to an inflammation and/or burning sensation at the arch of the foot.

Cause

There are many different factors that can cause arch pain. A structural imbalance or an injury to the foot can often be the direct cause. However, most frequently the cause is a common condition called plantar fasciitis. The plantar fascia is a broad band of fibrous tissue located along the bottom surface of the foot that runs from the heel to the forefoot. Excessive stretching of the plantar fascia, usually due to over-pronation (flat feet), causes plantar fasciitis. The inflammation caused by the plantar fascia being stretched away from the heel often leads to pain in the heel and arch areas. The pain is often extreme in the morning when an individual first gets out of bed or after a prolonged period of rest. If this condition is left untreated and strain on the longitudinal arch continues, a bony protrusion may develop, known as a heel spur. It is important to treat the condition promptly before it worsens.

Arthritis

Arthritis is a disease characterized by the inflammation of the cartilage and lining of the body's joints. Inflammation causes redness, warmth, pain and swelling. There are about 40 million Americans who suffer from arthritis. The National Institute of Arthritis and Musculoskeletal and Skin Diseases, estimates that by the year 2020, about 60 million Americans will have arthritis. The primary targets for arthritis are people over the age of 50. Arthritis is a major cause of foot pain because each foot has 33 joints that can become affected by the disease.

Osteoarthritis

There are many different types of arthritis. The most common type is called osteoarthritis. Osteoarthritis causes excessive strain and the wearing away of cartilage in the joints of the foot. Movement becomes very difficult and painful. The pain and swelling worsens while standing or walking, and stiffness usually occurs after periods of rest.

Gout

Gout is another form of arthritis that also leads to foot complications. Excess uric acid crystals collect in and around the joints of the big toe. The big toe joint is commonly the focal point due to the stress and pressure it experiences during walking and other weight bearing activities. This often leads to severe pain in the big toe. Men are more likely to develop gouty arthritis than women.

Rheumatoid Arthritis

Another type of arthritis is rheumatoid arthritis. It can develop at any age and there is no known cause for this condition. Rheumatoid arthritis is the most crippling form of the disease that can affect people of all ages. It can cause severe deformities of the joints with associated fatigue of the entire body. People who suffer from rheumatoid arthritis often develop severe forefoot problems such as bunions, hammer toes, claw toes, and others.

Cause

There are many causes of arthritis. Heredity plays a major role. However, arthritic symptoms can develop due to many other factors. Some of these include bacterial and viral infections, prescription and illegal drugs, traumatic injuries, and bowel disorders such as ileitis and colitis.

Forefoot problems such as hammer toes, claw toes, mallet toes, and bunions often develop as a result of arthritis, particularly Rheumatoid arthritis. Problems can also develop in the heel and ankle area due to the erosion of the involved joints.

Athlete's Foot

Athlete's foot is a fungal infection that causes red, dry, flaking skin, sometimes accompanied by pain or itching. The condition usually occurs between the toes or on the soles or sides of the feet. In its acute stage, the infected foot exhibits blisters that itch or "weep". Athlete's Foot can spread to the toenails, causing chronic fungal infections. Often when a patient thinks the feet are only dry and cracking, Athlete's Foot is responsible for the problem.

Cause

Fungal infections like Athlete's Foot are often contracted in showers, gyms, dressing rooms, swimming pool lockers, or other warm, damp areas where fungus can thrive. The name of the condition comes from the fact that athletes spend the most time in these environments and therefore are at a higher risk of fungal infection.

Once fungal spores are present on the feet, they can enter fissures or sores and remain there to spread, unless the feet are carefully washed and thoroughly dried after exposure.

Athlete's Foot can spread from the toes to the toenails. If the patient touches or scratches the infection and then touches other parts of the body, the fungus can spread to fingernails or other parts of the body, including the groin or underarms.

Like any foot condition, Athlete's Foot is of special concern to people with diabetes and compromised immune systems who are more susceptible to developing infections that can lead to serious medical problems.

Bunions

Bunions, referred to in the medical community as Hallux Valgus, are one of the most common forefoot problems. A bunion is a prominent bump on the inside of the foot around the big toe joint. This bump is actually a bone protruding towards the inside of the foot. With the continued movement of the big toe towards the smaller toes, it is common to find the big toe resting under or over the second toe. This causes a common forefoot condition called overlapping toes. Some of the symptoms of bunions include inflammation, swelling, and soreness on the side surface of the big toe. The discomfort commonly causes a patient to walk improperly.

Another type of bunion which some individuals experience is called a Tailor's Bunion, also known as a Bunionette. This forms on the outside of the foot towards the joint at the little toe. It is a smaller bump that forms due to the little toe moving inwards, towards the big toe.

Cause

Bunions are a common problem experienced mostly by women. The deformity can develop from an abnormality in foot function, or arthritis, but is more commonly caused by wearing improper fitting footwear. Tight, narrow dress shoes with a constrictive toe box (toe area) can cause the foot to begin to take the shape of the shoe, leading to the formation of a bunion. Women who have bunions normally wear dress shoes that are too small for their feet. Their toes are squeezed together in their shoes causing the first metatarsal bone to protrude on the side of the foot.

It is important for men and women to realize that wearing dress shoes and boots, which are tapered in the toe area, can cause the bunion to worsen to the point where surgery is necessary.

Calluses

The formation of calluses is caused by an accumulation of dead skin cells that harden and thicken over an area of the foot. This callus formation isthe body's defense mechanism to protect the foot against excessive pressure and friction. Calluses are normally found on the ball-of-the-foot, the heel, and/or the inside of the big toe. Some calluses have a deep seated core known as a nucleation. This particular type of callus can be especially painful to pressure. This condition is often referred to as Intractable Plantar Keratosis.

Cause

Calluses develop because of excessive pressure at a specific area of the foot. Some common causes of callus formation are high-heeled dress shoes, shoes that are too small, obesity, abnormalities in the gait cycle (walking motion), flat feet, high arched feet, bony prominences, and the loss of the fat pad on the bottom of the foot.

CMT

Charcot-Marie-Tooth, or CMT, is inherited peripheral neuropathy and is found worldwide among all races and ethnic groups. Discovered in 1886 by three physicians, Jean-Martin Charcot, Pierre Marie, and Howard Henry Tooth, CMT affects an estimated 2.6 million people.

CMT usually isn’t life-threatening and almost never affects brain function. It is not contagious, but it is hereditary and can be passed down from one generation to the next.

CMT patients slowly lose normal use of their extremities as nerves degenerate and muscles weaken because the affected nerves no longer stimulate the muscles. Many patients also have some loss of sensory nerve functions.

Symptoms

 

Although there are many different genetic causes of CMT, all types tend to have remarkably similar symptoms.

  • A high arched foot is generally one of the first signs of this disorder, although in some instances extremely flat feet are also typical of CMT.
  • As the disease progresses, structural foot deformities take place. The patient may develop a pes cavus (high-arched) foot and hammertoes.
     
  • The progressive muscle wasting of CMT also leads to problems with walking, running, and balance. Ankle weakness and sprains are common, and many patients develop foot drop.
  • Later in the course of the disease, hand function may become affected. Tasks requiring manual dexterity become difficult. The loss of nerve function is often accompanied by tingling and burning sensations in the hands and feet. This usually causes little more than mild discomfort, but some people experience severe neuropathic pain and require medication to control it.
  • Weakness of the respiratory muscles is in rare in people with CMT, but when present, it can cause life-threatening problems. If shortness of breath is an issue, a patient should be checked by a respiratory specialist to see if the use of a ventilator is recommended. 


It is important to note that the severity of symptoms can vary greatly from patient to patient, even within the same family. A child may or may not be more severely disabled than his/her parent. Some family members may experience significant impairment and require bracing while others have no noticeable symptoms but are found to have CMT upon examination by EMG or nerve conduction studies.

Claw Toes

A claw toe is a toe that is contracted at the PIP and DIP joints (middle and end joints in the toe), and can lead to severe pressure and pain. Ligaments and tendons that have tightened cause the toe's joints to curl downwards. Claw toes may occur in any toe, except the big toe. There is often discomfort at the top part of the toe that is rubbing against the shoe and at the end of the toe that is pressed against the bottom of the shoe. Claw toes are classified based on the mobility of the toe joints. There are two types - flexible and rigid. In a flexible claw toe, the joint has the ability to move. This type of claw toe can be straightened manually. A rigid claw toe does not have that same ability to move. Movement is very limited and can be extremely painful. This sometimes causes foot movement to become restricted leading to extra stress at the ball-of-the-foot, and possibly causing pain and the development of corns and calluses.

Cause

Claw toes result from a muscle imbalance which causes the ligaments and tendons to become unnaturally tight. This results in the joints curling downwards. Arthritis can also lead to many different forefoot deformities, including claw toes.

Corns

Corns like calluses develop from an accumulation of dead skin cells on the foot, forming thick, hardened areas. They contain a cone-shaped core with a point that can press on a nerve below, causing pain. Corns are a very common ailment that usually form on the tops, sides and tips of the toes. Corns can become inflamed due to constant friction and pressure from footwear. Corns that form between the toes are sometimes referred to as soft corns.

Cause

Some of the common causes of corn development are tight fitting footwear, high heeled footwear, tight fitting stockings and socks, deformed toes, or the foot sliding forward in a shoe that fits too loosely. Soft corns result from bony prominences and are located between the toes. They become soft due to perspiration in the forefoot area. Complications that can arise from corns include bursitis and the development of an ulcer.

Ganglion

A ganglion is a soft tissue mass that most commonly occurs on the wrist in women between 25 and 45 years of age. They are also seen commonly on the foot. A ganglion is a firm, rubbery mass that occurs on the top of the foot. On the foot, the most common area of involvement is in front of the ankle or on the outside of the ankle. A common characteristic of a ganglion is that they will enlarge and then shrink is size. They generally occur without any apparent cause. Ganglions arise spontaneously from a weakness in the soft tissue covering of a joint or tendon sheath. Ballooning out of the tissue occurs and it fills with a thick mucoid fluid. In many instances, ganglions are not painful until they reach a size that causes irritation from shoe pressure. On occasion they will compress a nearby skin nerve and cause tingling into the top of the toes. Tapping on the ganglion will often result in this same tingling sensation into the toes. Other common masses on the foot are giant cell tumors, fibromas and lipomas.

Hammer Toe

A hammer toe is a toe that is contracted at the PIP joint (middle joint in the toe), potentially leading to severe pressure and pain. Ligaments and tendons that have tightened cause the toe's joints to curl downwards. Hammer toes may occur in any toe except the big toe. There is often discomfort at the top part of the toe due to rubbing against the shoe. Hammer toes are classified based on the mobility of the toe joints. There are two types - flexible and rigid. In a flexible hammer toe, the joint has the ability to move. This type of hammer toe can be straightened manually. A rigid hammer toe does not have that same ability to move. Movement is very limited and can be extremely painful. This sometimes causes foot movement to become restricted leading to extra stress at the ball-of-the-foot, and possibly causing pain and the development of corns and calluses. Follow this link to learn more about hammer toe products.

Cause

Hammer toes result from a muscle imbalance which causes the ligaments and tendons to become unnaturally tight. This results in the joint curling downward. Arthritis can also lead to many different forefoot deformities, including hammer toes.

Heel Fissures

Heel fissures, also known as cracked heels can be a simple cosmetic problem and a nuisance, but can also lead to serious medical problems. Heel fissures occur when the skin on the bottom, outer edge of the heel becomes hard, dry and flaky, sometimes causing deep fissures that can be painful or bleed.

Cause

Heel fissures can affect anyone, but risk factors include: Living in a dry climate Obesity Consistently walking barefoot or wearing sandals or open-backed shoes Inactive sweat glands Like many foot conditions, heel fissures can become more dangerous if they go untreated and become deep or infected. This is especially dangerous for people with diabetes or compromised immune systems.

Heel Pain

Heel pain is a common condition in which weight bearing on the heel causes extreme discomfort.

Cause

There are two different categories of heel pain. The first is caused by over-use repetitive stress which refers to a soreness resulting from too much impact on a specific area of the foot. This condition, often referred to as "heel pain syndrome," can be caused by shoes with heels that are too low, a thinned out fat pad in the heel area, or from a sudden increase in activity. Plantar fasciitis, a very common diagnosis of heel pain, is usually caused from a biomechancial problem, such as over-pronation (flat feet). The plantar fascia is a broad band of fibrous tissue that runs along the bottom surface of the foot, from the heel through the midfoot and into the forefoot. Over-pronation can cause the plantar fascia to be excessively stretched and inflamed, resulting in pain in the heel and arch areas of the foot. Often the pain will be most intense first thing in the morning or after a prolonged period of rest. The pain will gradually subside as the day progresses.

 

Ingrown Toe Nail

Known to physicians as onychocryptosis, ingrown toe nails are a common, painful condition that occur when skin on one or both sides of a nail grows over the edges of the nail, or when the nail itself grows into the skin. This condition is usually very painful and can be associated with infection of the toe. Some ingrown toenails are chronic, with repeated episodes of pain and infection. Irritation, redness, an uncomfortable sensation of warmth, as well as swelling can result from an ingrown toenail.

Cause

Ingrown toenails develop for many reasons. In some cases the condition is congenital, such as toenails that simply are too large. People whose toes curl, either congenitally or from diseases like arthritis, are prone to ingrown toenails. Often trauma, like stubbing a toe or having a toe stepped on, can cause a piece of the nail to be jammed into the skin. Repeated trauma, such as the pounding to which runners typically subject their feet, also can cause ingrown nails.

The most common cause is cutting your toenails incorrectly, causing them to re-grow into the skin. Tight hosiery or shoes with narrow toe boxes only make matters worse. If the skin is red, painful or swollen on the sides of the nail, an infection may be present. This occurs because the ingrown nail is often in a warm, moist and bacteria-rich environment. When the nail penetrates the skin, it provides a convenient entry for germs that can cause infection. Untreated, the nail can go under the skin, causing a more severe infection. In either case, the infection needs to be cured with sterile instruments and antibiotics.

Metatarsalgia

Metatarsalgia is a general term used to denote a painful foot condition in the metatarsal region of the foot (the area just before the toes, more commonly referred to as the ball-of-the-foot). This is a common foot disorder that can affect the bones and joints at the ball-of-the-foot. Metatarsalgia (ball-of-foot-pain) is often located under the 2nd, 3rd, and 4th metatarsal heads, or more isolated at the first metatarsal head (near the big toe).

Cause

With this common foot condition, one or more of the metatarsal heads become painful and/or inflamed, usually due to excessive pressure over a long period of time. It is common to experience acute, recurrent, or chronic pain with metatarsalgia. Ball-of-foot pain is often caused from improper fitting footwear, most frequently by women's dress shoes and other restrictive footwear. Footwear with a narrow toe box (toe area) forces the ball-of-foot area to be forced into a minimal amount of space. This can inhibit the walking process and lead to extreme discomfort in the forefoot. Other factors can cause excessive pressure in the ball-of-foot area that can result in metatarsalgia. These include shoes with heels that are too high or participating in high impact activities without proper footwear and/or orthotics. Also as we get older, the fat pad in our foot tends to thin out, making us much more susceptible to pain in the ball-of-the-foot.

Morton's neuroma

Morton's Neuroma is a common foot problem associated with pain, swelling and/or an inflammation of a nerve, usually at the ball-of-the-foot between the 3rd and 4th toes. Symptoms of this condition include sharp pain, burning, and even a lack of feeling in the affected area. Morton's Neuroma may also cause numbness, tingling, or cramping in the forefoot.

Cause

Morton's Neuroma is a foot condition caused from an abnormal function of the foot that leads to bones squeezing a nerve usually between the 3rd and 4th metatarsal heads. Symptoms of Morton's Neuroma often occur during or after you have been placing significant pressure on the forefoot area, while walking, standing, jumping, or sprinting. This condition can also be caused by footwear selection. Footwear with pointed toes and/or high heels can often lead to a neuroma. Constricting shoes can pinch the nerve between the toes, causing discomfort and extreme pain.

 

Neuropathy

Of the 16 million Americans with diabetes, 25% develop foot problems related to the disease. This is primarily due to a condition called neuropathy. Diabetic Neuropathy is a complication of diabetes that affects the nerves. The most common type of diabetic neuropathy is called peripheral neuropathy and affects the peripheral nerves. Peripheral nerves are the nerves that go out from the brain and spinal cord to the muscles, skin, internal organs, and glands. Peripheral neuropathy impairs proper functioning of these sensory and motor nerves. The most common symptoms of neuropathy include numbness and loss of feeling, usually in the feet and hands.

Cause

Diabetic Neuropathy can cause insensitivity or a loss of ability to feel pain, heat, and cold. Diabetics suffering from neuropathy can develop minor cuts, scrapes, blisters, or pressure sores that they may not be aware of due to the insensitivity. If these minor injuries are left untreated, complications may result and lead to ulceration and possibly even amputation. Neuropathy can also cause deformities such as Bunions, Hammer Toes, and Charcot Feet. It is very important for diabetics to take the necessary precautions to prevent all foot-related injuries. Due to the consequences of neuropathy, daily observation of the feet is critical. When a diabetic patient takes the necessary preventative footcare measures, he or she reduces the risk of developing serious foot conditions.

Over-Pronation

Over-pronation, or flat feet, is a common biomechanical problem that occurs in the walking process when a person's arch collapses upon weight bearing. This motion can cause extreme stress or inflammation on the plantar fascia, potentially causing severe discomfort and leading to other foot problems.

Cause

Over-pronation is very prominent in people who have flexible, flat feet. The framework of the foot begins to collapse, causing the foot to flatten and adding stress to other parts of the foot. As a result, over-pronation, often leads to Plantar Fasciitis, Heel Spurs, Metatarsalgia, Post-tib Tendonitis and/or Bunions. There are many causes of flat feet. Obesity, pregnancy or repetitive pounding on a hard surface can weaken the arch leading to over-pronation. Often people with flat feet do not experience discomfort immediately, and some never suffer from any discomfort at all. However, when symptoms develop and become painful, walking becomes awkward and causes increased strain on the feet and calves.

Plantar Fasciitis

Plantar Fasciitis is an inflammation caused by excessive stretching of the plantar fascia. The plantar fascia is a broad band of fibrous tissue which runs along the bottom surface of the foot, attaching at the bottom of the heel bone and extending to the forefoot. When the plantar fascia is excessively stretched, this can cause plantar fasciitis, which can also lead to heel pain, arch pain, and heel spurs.

Cause

Plantar Fasciitis often leads to heel pain, heel spurs, and/or arch pain. The excessive stretching of the plantar fascia that leads to the inflammation and discomfort can be caused by the following: Over-pronation (flat feet) which results in the arch collapsing upon weight bearing A foot with an unusually high arch A sudden increase in physical activity Excessive weight on the foot, usually attributed to obesity or pregnancy Improperly fitting footwear Over-pronation (flat feet) is the leading cause of plantar fasciitis. Over-pronation occurs in the walking process, when a person's arch collapses upon weight bearing, causing the plantar fascia to be stretched away from the heel bone. With Plantar Fasciitis, the bottom of your foot usually hurts near the inside of the foot where the heel and arch meet. The pain is often acute either first thing in the morning or after a long rest, because while resting the plantar fascia contracts back to its original shape. As the day progresses and the plantar fascia continues to be stretched, the pain often subsides.

Foot Changes During Pregnancy

Pregnancy triggers many different changes in a woman's body. Many women have common complaints throughout their pregnancy. One of these complaints, often overlooked, is foot pain. Due to the natural weight gain during pregnancy, a woman's center of gravity is completely altered. This causes a new weight-bearing stance and added pressure to the knees and feet.Two of the most common foot problems experienced by pregnant woman are over- pronation and edema. These problems can lead to pain at the heel, arch, or the ball-of-foot. Many women may also experience leg cramping and varicose veins due to weight gain. Because of this, it is important for all pregnant women to learn more about foot health during their pregnancy to help make this nine month period more comfortable for them. Two of the most common foot problems experienced by pregnant woman are over-pronation and edema. These problems can lead to pain at the heel, arch, or the ball-of-foot. Many women may also experience leg cramping and varicose veins due to weight gain. Because of this, it is important for all pregnant women to learn more about foot health during their pregnancy to help make this nine month period more comfortable for them.

Cause

Over-pronation and edema a very common foot problem experienced during pregnancy. Over-Pronation, also referred to as flat feet, is caused when a person's arch flattens out upon weight bearing and their feet roll inward when walking. This can create extreme stress or inflammation on the plantar fascia, the fibrous band of tissue that runs from the heel to the forefoot. Over-pronation can make walking very painful and can increase strain on the feet, calves and/or back. The reason many pregnant women suffer from over-pronation is the added pressure on the body as a result of weight gain. Over-pronation is also very prominent in people who have flexible, flat feet or in people who are obese. Edema, also referred to as swelling in the feet, normally occurs in the latter part of pregnancy. Edema results from the extra blood accumulated during pregnancy. The enlarging uterus puts pressure on the blood vessels in the pelvis and legs causing circulation to slow down and blood to pool in the lower extremities. The total water fluid in the body remains the same as before pregnancy, however it becomes displaced. When feet are swollen, they can become purplish in color. Sometimes extra water is retained during pregnancy, adding to the swelling. If there is swelling in the face or hands, a doctor should be contacted immediately.

Sesamoiditis

Sesamoiditis is a common ailment that affects the forefoot, typically in young people who engage in physical activity like running or dancing. Its most common symptom is pain in the ball-of-the-foot, especially on the medial or inner side. The term is a general description for any irritation of the sesamoid bones, which are tiny bones within the tendons that run to the big toe. Like the kneecap, the sesamoids function as a pulley, increasing the leverage of the tendons controlling the toe. Every time you push off against the toe the sesamoids are involved, and eventually they can become irritated, even fractured. Because the bones are actually within the tendons, sesamoiditis is really a kind of tendinitis - the tendons around the bones become inflamed as well.

Cause

Sesamoiditis typically can be distinguished from other forefoot conditions by its gradual onset. The pain usually begins as a mild ache and increases gradually as the aggravating activity is continued. It may build to an intense throbbing. In most cases there is little or no bruising or redness. One of the major causes of sesamoiditis is increased activity. You've probably stepped up your activity level lately, which has forced you to put more pressure on the balls of your feet. Speedwork, hillwork, or even increased mileage can cause this. If you have a bony foot, you simply may not have enough fat on your foot to protect your tender sesamoids. Also, if you have a high arched foot, you will naturally run on the balls-of-your-feet, adding even more pressure.

Shin Splints

Shin splints are a common lower extremity complaint, especially among runners and other athletes. They are characterized by pain in the front or inside aspect of the lower leg due to overexertion of the muscles. The pain usually develops gradually without a history of trauma, and might begin as a dull ache along the front or inside of the shin (Tibia) after running or even walking. Small bumps and tender areas may become evident adjacent to the shin bone. The pain can become more intense if not addressed, and shin splints should not be left untreated because of an increased risk of developing stress fractures. Shin splints usually involve small tears in the leg muscles where they are attached to the shin bone. The two types of shin splints are: anterior shin splints, in the front portion of the tibia; and posterior shin splints, occurring on the inside of the leg along the tibia.

Cause

Shin splints can be caused when the anterior leg muscles are stressed by running, especially on hard surfaces or extensively on the toes, or by sports that involve jumping. Wearing athletic shoes that are worn out or don't have enough shock absorption can also cause this condition. Over-pronated (flat feet) are another factor that can lead to increased stress on the lower leg muscles during exercise. People with high arched feet can also experience shin splint discomfort because this foot type is a poor shock absorber.

Sprains and Strains

Ankle sprains are one of the most common joint injuries runners experience. The injury can occur when one rolls over a rock, lands off a curb, or steps in a small hole or crack in the road. Usually the sprain is only mild, but on occasion it may seriously injure the ligaments or tendons surrounding the ankle joint. Management of this injury relies on early and accurate diagnosis, as well as an aggressive rehabilitation program directed toward reducing acute symptoms, maintaining ankle stability, and returning the runner to pre-injury functional level.