Truth of Foot Biomechanics: Is the fluffy functional insoles ruining my foot core muscles?
Hello, I'm Winkbits, an ordinary office worker who enjoys going to work and running on weekends every morning, and a reliable father of children. There are so many people who suffer from pain in their soles and knees as they have recently started running for health. I also believed that until early 2025, the answer was only the expensive functional insoles that were fluffy and strongly supported by the arch. Ironically, however, the thicker the cushion, the more frequent the ankle sprain, and plantar fasciitis became chronic.
Why do we suffer from more foot disease than in the past even when we wear high-tech, fluffy shoes? Today, my blog for Winkbits will explore the shocking truth and alternatives of how the fluffy insoles we've been blind to weaken the core muscles of my feet, based on the latest 2026 foot biomechanics data.
How do the soles fascia and core muscles weaken if you wear artificial insoles for a long time?
When you have pain in the soles of your feet, the first thing you look for is a functional insole that supports your arches. But did you know that these artificial supports can be rather poisonous in the long run? The soles of our feet are intertwined with tiny intrinsic muscles that support our body's weight and absorb shocks. These muscles must stand on the ground and maintain their natural arch structure, which bounces like a spring.
According to a long-term follow-up report published in the 2025 Society of Chiropodists and Podiatrists clinical journal
, the group who continuously wore functional footwear for more than a year suffered from mechanical side effects that greatly reduced the elasticity of the plantar fascia. This is because the insole artificially supports the arch, gradually causing muscular dystrophy by judging that the core muscles of the foot "strong>" do not need to work on their own. It is exactly the same principle that wearing a cast for a long time will thin the muscles of the limbs.How does a thick sneaker midsole paralyze our brain's proprioceptive senses?
There are tens of thousands of nerve cells on our soles that detect the minute curvature of the ground and the temperature and deliver it to the brain. This is called uniquely water-soluble sensation. The brain analyzes this feedback from the soles of the feet in real time to control the angles of the knees, hip joints, and spine and the tension of the muscles.
However, thick foam midsole, which measures 25 to 40 mm, completely blocks the feedback loop of the nervous system. Harvard University Department of Human Evolutionary Biology According to the latest 2026 driving biomechanics paper, when wearing fluffy cushioning shoes, the brain is not aware of the impact on the ground, causing the foot to slam into the ground stronger. Running in a state of paralysis of the senses causes the impact to transfer intact to the knees and joints, which increases the risk of injury.
The mechanical principle of preventing the internal ring of the humerus joint (Pronation) and tibial rotation of the ankle collapsing
Especially if we lose our balance on thick shoes, the sub-megal joints of our ankles go through an over-conversion phenomenon that excessively collapses inward. When the ankle falls inward, the shin bone (tibial bone) is forced to rotate, which directly leads to abnormal friction in the cartilage in the knee. The kinetic chain collapses from the bottom. On the other hand, thin, flat minimalist shoes are in close contact with the ground, physically blocking ankle instability and restoring mechanical balance naturally.
How do I discard functional insoles without injury and safely switch to barefoot shoes?
However, you should never throw away all the insoles and run barefoot on the hard floor from tomorrow morning. This is because the muscles of your feet, which have been trapped in shoes for decades and degenerated, cannot withstand sudden shocks and can cause Achilles tendonitis.
According to the step-by-step barefoot shoe transition protocol released in 2026 by the Global Consortium of Sports Biomechanics
, the first thing to do is to wake up the core strength of your feet by using the Short-foot maneuver. It is a drill that lifts the arches by itself by narrowing the distance between your feet and heels without bending your toes.I Winkbits also practiced this training at home for 10 minutes every day after work to wake up the sensation of my feet. After that, I bought barefoot shoes with a thin sole of about 8mm and a wide toe box, starting with a light walk of 20 minutes a day and gradually increasing the wearing time. After about three months of adaptation, the pain in the soles of my feet disappeared surprisingly and the stability of my ankles was noticeably improved. I highly recommend that you also invest in restoring the original core strength of your feet, rather than relying on artificial supports.
Frequently asked questions (FAQ)
Don't overdo it at once. First, you should wake up your muscle strength with barefoot walking and shorthand foot exercises at home, then start with a short walk of 15 minutes, twice a week in barefoot shoes, and give your muscles and ligaments enough time to adapt for more than three months.
It is most urgent for office workers and sports hobbyists who have flat feet without structural deformities, who suffer frequent ankle sprain, and who continue to suffer knee and hip pain while running in thick cushioning shoes.
✍️ Author: Winkbits
Specialty:Small daily knowledge information
연락처: 📧 yja150509@gmail.com
