Many adults are surprised to learn that flat feet can affect far more than just the feet themselves.
Collapsed arches and poor foot mechanics can contribute to discomfort throughout the entire body — including the knees, hips, and lower back.
At Vancouver Orthotic Clinics, we commonly see patients who initially seek help for heel pain, knee pain, or fatigue while walking, only to discover that underlying flat feet are playing a major role in their symptoms.
What Are Flat Feet?
Flat feet, also called pes planus, occur when the arches of the feet collapse or sit lower than normal.
Some people are born with flat feet, while others gradually develop them over time due to:
- Aging
- Weight gain
- Pregnancy
- Tendon weakness
- Injury
- Long periods of standing
- Poor footwear support
When the arches collapse excessively during walking, the feet often roll inward — a movement known as overpronation.
This altered movement pattern can place abnormal stress on muscles, joints, tendons, and ligaments throughout the body.
Common Symptoms of Flat Feet
Not everyone with flat feet experiences pain, but many adults eventually develop symptoms such as:
- Foot fatigue
- Heel pain
- Arch pain
- Achilles tendon discomfort
- Shin splints
- Knee pain
- Hip discomfort
- Lower back pain
- Uneven shoe wear
Some people also notice they cannot comfortably walk or stand for long periods without soreness or fatigue.
How Flat Feet Affect the Knees
The feet serve as the body’s foundation.
When the arches collapse excessively, the lower legs often rotate inward, which can change knee alignment and increase stress on the joints.
Over time, this may contribute to:
- Patellofemoral pain
- Knee strain
- Increased joint stress
- Walking inefficiency
Many patients do not realize their knee discomfort may actually begin with abnormal foot mechanics.
The Connection Between Flat Feet and Back Pain
Poor foot alignment can gradually affect posture and body mechanics higher up the chain.
When the feet roll inward excessively:
- The knees may rotate inward
- The hips may shift position
- Pelvic alignment may change
- Lower back muscles may compensate
Over time, these compensations can contribute to chronic tension and discomfort.
Why Supportive Footwear Matters
Unsupportive footwear can worsen flat-foot mechanics.
Shoes that are excessively soft, worn out, or lacking structure may allow the arches to collapse further during walking.
Supportive shoes typically include:
- Firm heel support
- Stable midsoles
- Proper arch structure
- Shock absorption
- Removable insoles
Many patients are surprised how much difference supportive footwear alone can make.
Can Custom Orthotics Help Flat Feet?
Custom orthotics are often recommended when poor foot mechanics are contributing to pain or functional problems.
Orthotics are designed to:
- Support the arches
- Improve foot alignment
- Reduce excessive pronation
- Improve walking mechanics
- Reduce strain on joints and soft tissues
At Vancouver Orthotic Clinics, orthotics are customized based on:
- Foot structure
- Gait mechanics
- Activity level
- Footwear type
- Individual symptoms
Because every patient’s biomechanics are different, treatment should be individualized rather than “one-size-fits-all.”
Flat Feet in Children vs Adults
Flat feet are common in children and may not always require treatment.
However, adults who develop worsening symptoms such as pain, fatigue, instability, or progressive arch collapse may benefit from professional assessment.
In some cases, untreated flat feet can gradually contribute to chronic overuse injuries.
When Should You Seek Assessment?
You may benefit from a biomechanical evaluation if you experience:
- Ongoing heel pain
- Arch pain
- Knee discomfort during walking
- Leg fatigue
- Difficulty standing for long periods
- Frequent overuse injuries
- Uneven shoe wear
- Recurring plantar fasciitis
Early treatment may help reduce long-term strain and improve comfort during daily activity.
What to Expect at Vancouver Orthotic Clinics
At Vancouver Orthotic Clinics, assessments may include:
- Gait analysis
- Foot structure evaluation
- Postural assessment
- Footwear recommendations
- Orthotic evaluation if appropriate
The clinic commonly treats:
- Flat feet
- Plantar fasciitis
- Heel pain
- Achilles tendonitis
- Bunions
- Knee pain related to foot mechanics
Final Thoughts
Flat feet are extremely common, but they are not always harmless.
For many adults, collapsed arches and poor foot mechanics can gradually contribute to discomfort throughout the feet, knees, hips, and lower back.
Identifying the underlying biomechanical causes early may help improve comfort, mobility, and long-term function.
