Your knees do far more than simply bend. They carry your entire body weight with every step you take. Walking. Climbing stairs. Squatting. Getting in and out of the car. Picking up your grandchild. Playing pickleball. Hiking. Skiing. And yet most people do not think about their knees until they hurt. By then, the problem may have been developing quietly for years.
As a chiropractor with more than 40 years of clinical experience, I can tell you this with confidence:
Knee problems rarely begin at the knee.
That surprises many people, but when you understand how the body works as a connected mechanical system, it makes perfect sense.
Your Knee Is More Than a Simple Hinge
Many people think of the knee as a simple hinge joint. It is not. The knee is a sophisticated load-bearing shock absorber designed to handle enormous stress every single day.
Your knees connects two major bones:
The femur — your thigh bone
The tibia — your shin bone
The bottom of the femur is rounded. The top of the tibia is relatively flat. That means the knee depends on additional structures to create stability and distribute force properly.
Enter the menisci. These two crescent-shaped cartilage pads act like shock absorbers between the femur and tibia.
The menisci help:
- Distribute body weight evenly
- Improve joint stability
- Reduce friction
- Absorb impact
- Protect the joint surfaces from premature wear
Without them, the knee would wear out much faster. But even healthy menisci cannot protect a poorly aligned joint forever.
Why Most Knees Wear Out on the Inside
If you look at knee replacement X-rays, a common pattern appears again and again.
The inside portion of the knee—the medial compartment—often shows the most wear.
Why? Because of biomechanics. And often, because of your feet.
The Hidden Cause of Knee Arthritis: Fallen Arches
Most people never connect foot mechanics with knee pain. They should. Your feet are the foundation of your body. When that foundation collapses, everything above it compensates. Many adults have some degree of arch collapse or overpronation.
Why? Modern life. We were not designed to grow up in rigid shoes walking on hard, flat surfaces. We were designed to move barefoot over natural terrain: grass; dirt; sand; and uneven ground which naturally stimulates and strengthens the small stabilizing muscles of the feet. Instead, many of us spend decades in footwear that may feel supportive, but over time can weaken natural foot function. As the arches weaken and fall, the mechanical chain reaction begins.
How Flat Feet Stress Your Knees
When your arch collapses your foot rolls inward. That causes your tibia (shin bone) to rotate inward. That inward rotation drives excessive pressure into the inside of the knee.
Over time, that can lead to:
- Increased stress on the meniscus
- More compression in the medial knee compartment
- Accelerated cartilage wear
- Progressive degeneration
- Arthritis developing in slow motion
In simple terms:
Flat foot → inward shin rotation → increased inside knee stress → premature wear
Biomechanical research has shown that excessive pronation can increase loading in the medial compartment of the knee.
Try This Simple Experiment
Want to feel this for yourself?
Stand with your feet wider than shoulder width.
Now gently push your knees inward toward each other.
Notice what happens.
Do your knees feel compressed?
Does your posture slump?
Do you feel less stable?
Now do the opposite.
Gently push your knees outward.
What changes?
Most people immediately notice:
- Less knee stress
- Better posture
- More stability
- A stronger overall stance
Alignment matters.
The Body Works as a Chain
Your body is not a collection of separate parts. It is a connected kinetic chain.
Your:
Feet influence your tibia
Tibia influences your knees
Knees influence your hips
Hips influence your spine
If the foundation fails, everything above it compensates, and often, the knees pay the price.
Can Supporting Your Arches Help?
In many cases, yes.
Proper arch support can reduce abnormal inward rotation and help improve knee mechanics. Research suggests that properly selected orthotics may reduce medial knee loading in some people with knee osteoarthritis. Over-the-counter inserts may help some individuals. But in my clinical experience, properly fitted custom spinal-stabilizing orthotics often provide better biomechanical correction.
One important note:
Rigid is not always better.
Your feet are designed to move.
Your orthotics should support movement—not block it.
When foot mechanics improve:
- Knee stress often decreases
- Meniscal strain may reduce
- Hip alignment improves
- Spinal posture improves
- Walking becomes more efficient
You are not just supporting your feet. You are protecting your knees.
Curious About Your Foot Arches?
Many people have no idea whether their arches are healthy, collapsing, or silently contributing to knee pain.
At Performance Health Center, we use a computerized foot scanner that quickly evaluates your arches, weight distribution, and overall foot mechanics.
The screening is complimentary, takes only about five minutes, and can help determine whether poor foot biomechanics may be contributing to knee, hip, or back problems.
If your screening suggests that you may benefit from custom foot orthotics, we can recommend the orthotic that is most appropriate for your specific biomechanics and activity level.
If you would like to have your feet screened, please call our office first to schedule an appointment.
Performance Health Center – 508-655-9008
Exercises That Help Protect Your Knees
1. Short Foot Exercise
Stand barefoot.
Gently draw the ball of your foot toward your heel without curling your toes.
Hold for 5–10 seconds.
Repeat 10 times per foot.
This helps strengthen the small stabilizing muscles that support the arch.
2. Lateral Band Walks
Place a resistance band around your knees or ankles.
Slightly bend your knees.
Step sideways while keeping your knees gently aligned outward.
Take 10–15 steps in each direction.
This strengthens the glute muscles, which help stabilize knee position.
3. Step-Down Control Drill
Stand on a step.
Slowly lower one heel toward the floor.
Keep your knee aligned over your second toe.
Do not allow the knee to collapse inward.
Perform 8–12 repetitions per side.
This improves movement control under real-world load.
4. Supported Squats
Perform a bodyweight squat.
Keep your arches lifted.
Maintain an upright posture.
Gently encourage your knees outward rather than allowing them to collapse inward.
Perform 2 sets of 10 repetitions.
The Bottom Line
Knees rarely suddenly wear out. Most knee problems develop gradually over years as small biomechanical stresses are repeated thousands, or even millions of times. If your knees are hurting, the problem may not actually begin where you feel the pain. Often the real issue starts lower down with the feet. Supporting your arches, improving alignment, and strengthening the muscles that control movement can go a long way toward protecting your knees for the long term.
If you want to know if your foot mechanics are part of the problem, our complimentary 5-minute computerized foot scan can help point you in the right direction.
Simply call Performance Health Center at 508-655-9008 to schedule your screening.
Protect your foundation—and your knees may thank you for decades.
For more information, email me at drbradweiss@performancehealthcenter.com