Why Your Foot Feels Weak When You Lift It: Understanding & Treating Top of Foot Weakness in 2026

The common peroneal nerve wraps around the head of the fibula (the bone on the outside of your knee) before branching down to supply the muscles that lift your foot. This nerve is superficially located and highly vulnerable to compression.

Typical causes: Prolonged bed rest with legs turned outward, habitual leg crossing, tight knee braces, or direct trauma to the side of the knee. Even wearing a heavy cast on the lower leg can compress this nerve.

Key sign: Numbness or tingling on the top of the foot and the outer side of the lower leg, combined with weakness lifting the foot.

When the L5 nerve root in the lower back is compressed — often by a herniated disc, spinal stenosis, or arthritis — it directly affects the nerves that control foot dorsiflexion. This is a classic presentation of “sciatica” affecting motor function.

Distinguishing feature: Weakness is often accompanied by lower back pain or stiffness, and the symptoms may follow a “dermatomal” pattern down the side of the leg and into the top of the foot. You may also have difficulty walking on your heels.

Risk factors: Age over 50, prolonged sitting, obesity, and occupation involving heavy lifting or repetitive bending.

The extensor tendons run along the top of your foot and are responsible for pulling your toes upward. Overuse, tight shoe laces, or direct injury can inflame these tendons (tendonitis) or, in severe cases, cause a partial or full rupture.

Symptoms: Pain and swelling on the top of the foot that worsens when you try to lift your toes against resistance. Tenderness to the touch directly over the tendon. A rupture may cause a noticeable gap in the tendon line and sudden, sharp pain.

Common scenarios: Runners rapidly increasing mileage, hikers wearing crampons or stiff boots, or anyone who repeatedly wears shoes with overly tight lacing across the instep.

Long-term conditions like diabetes, chronic alcoholism, or vitamin B12 deficiency can damage the peripheral nerves that supply the feet. This damage often presents broadly across both feet, not just one.

Symptoms: Weakness is usually accompanied by numbness, a “pins and needles” sensation, or burning pain in both feet. The weakness may be gradual and progressive, making it feel like your feet are simply getting weaker over months or years.

Management: Strict blood sugar control, supplementation of deficient vitamins, and physical therapy are the mainstays. Footwear becomes critical for protection and gait correction.

The anterior compartment of the lower leg houses the tibialis anterior muscle — the primary muscle responsible for dorsiflexion. Excessive pressure within this compartment, often from overuse or trauma, can compress the blood supply and nerves.

Acute vs. Chronic: Acute compartment syndrome is a medical emergency requiring fasciotomy. Chronic exertional compartment syndrome (CECS) causes pain and weakness during exercise that resolves with rest.

Signs: A feeling of tightness or swelling in the front of the shin, combined with foot drop during or after activity. The muscle may feel hard or bulging.

Yes, in many cases. If the cause is mild nerve compression (e.g., from habitually crossing your legs) or a minor tendon strain, symptoms can resolve within a few days to weeks once the aggravating factor is removed. However, if the weakness persists for more than two weeks, a medical evaluation is recommended to rule out structural nerve damage.

There is no single “best” shoe, but the most commonly recommended traits are a rocker sole for gait assistance, a wide toe box to avoid pressure on the dorsum, and a stable heel counter. Specific models include the Hoka Bondi 9, Brooks Ghost Max 2, and the New Balance Fresh Foam X 1080v14. For those who wear an AFO, shoes with a removable insole and a wide opening (like the Orthofeet Coral or Propet brands) are preferable.

Recovery time depends on the severity of the nerve injury. For mild compression (neuropraxia), recovery can occur within 3 to 6 weeks. For more severe injuries (axonotmesis), it can take 3 to 6 months as the nerve regenerates at a rate of about 1 inch per month. Full recovery is common with appropriate treatment, but some residual weakness may remain if the nerve was severely damaged or surgery is delayed.

A night splint that holds the foot in a neutral 90-degree position can be helpful, particularly if you have concurrent plantar fasciitis or tightness in the Achilles tendon. However, if the primary problem is nerve or tendon damage, a night splint alone will not correct the weakness. It is best used as an adjunct to physical therapy and proper footwear.

Yes. A condition known as anterior tarsal tunnel syndrome can occur when the deep peroneal nerve is compressed under the extensor retinaculum (a band of tissue on the top of the foot) — often caused by tightly laced boots or rigid shoes. This can cause numbness and weakness in the first web space of the foot and mild weakness in toe extension. Switching to a lacing system that relieves pressure over the instep is the primary treatment.