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What is the Plantar Fasciitis?

What is the Plantar Fascia?

The plantar fascia is a thick, flexible connective tissue band made of dense collagen fibers, located on the inner part of the foot, extending from the heel to the toes.

The plantar fascia originates from the underside of the heel bone. It plays a crucial role in distributing body weight and providing stability. As it moves forward, it connects to the area under the toes, helping to stabilize the forefoot and assist with the push-off of the foot.

Structure of the Plantar Fascia:

The plantar fascia is primarily composed of type I collagen, which provides high tensile strength. This strong, flexible tissue allows the foot to resist forces, such as the pressure generated during walking and running.

Elastic layers: The flexible structure of the tissue allows the arch of the foot to rise and fall during movement, aiding in natural energy recovery and shock absorption.

How Does it Work?

In simple terms, when the foot strikes the ground, the plantar fascia stretches to absorb the impact created during movement. This stretching uses the energy stored in the ligament in an elastic way. As the body’s weight shifts forward, the plantar fascia contracts, helping with push-off.

The "windlass mechanism" is a key element of the plantar fascia. When the toes bend back (for example, during push-off in walking), the plantar fascia tightens and lifts the arch of the foot. This tension stabilizes the arch, making the push-off more efficient.

The plantar fascia supports the arch of the foot, ensuring that the foot can flexibly adapt to various surfaces and movements.

It is also important to mention the significance of sensory feedback, as there are many nerve endings beneath and around the plantar fascia, which constantly send feedback to the brain about the foot's contact with the ground.

Common Injury: Plantar Fasciitis

Plantar fasciitis is a common injury. Here are some specific statistics:

According to the American Academy of Orthopaedic Surgeons (AAOS) report:

More than 2 million people in the United States seek medical help for plantar fasciitis each year.

According to a study in the International Journal of Health Sciences:

Approximately 10% of the global population suffers from plantar fasciitis at least once in their lifetime.
Plantar fasciitis is one of the most common foot and foot-related problems worldwide, affecting the lives of many people.

Symptoms:

The most common symptom is sharp, stabbing heel pain, especially after the first steps in the morning when the fascia is stretched after rest. The pain may decrease with movement but can return after prolonged activity.

There may also be stiffness and tension in the middle of the foot and around the heel, which can affect movement.

Long-Term Effects:

If left untreated, the pain can become chronic. Changes in walking patterns and balance disruptions can affect the overall functioning of the musculoskeletal system, leading to further problems such as knee, hip, or back pain.

What Causes Inflammation?

The exact cause is complex, and several factors can contribute to its development. Let’s look at these causes:

The most commonly accepted theory is that mechanical stress leads to repeated microtraumas that cause inflammation. This may occur from prolonged standing or walking on hard surfaces, as well as sports activities involving a lot of running, jumping, or changing direction. These factors can contribute to inflammation.

There are also biomechanical factors, such as structural abnormalities of the foot. For example, flat feet place continuous stretching on the plantar fascia, and a high arch can place increased pressure on the fascia, as the foot cannot distribute the pressure as effectively during movement.

Tightness in the Achilles tendon can also cause inflammation, as it is anatomically connected to the fascia, and a tight Achilles tendon exerts increased pulling force on the fascia, potentially causing inflammation.

Overall, plantar fasciitis is a complex issue, often resulting from a combination of factors. Load, biomechanical characteristics, age-related changes, and regeneration issues can all contribute to inflammation. Understanding these causes can help in selecting appropriate prevention and treatment methods, such as foot strengthening, stretching, and proper footwear use.
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