Why Your Knee (or Hip) Hurts When You Run (But Not When You Walk)
You lace up your shoes. You start your run.
Five minutes in, you feel fine. Ten minutes in... there it is.
That familiar knee ache. Or that hip tightness.
You slow down. Maybe you walk for a bit. The pain eases.
But the moment you start running again, it returns.
Here's the confusing part: You can walk for hours without any pain. You can climb stairs. You can stand all day. Walking feels completely fine.
So why does running trigger pain?
If this sounds familiar, you're not alone. At Spheric Human Performance on Beach Road, we work with many runners in Singapore who experience this exact pattern—pain during running, but not during walking.
And here's what we've learned: Running doesn't cause the pain. It reveals the weakness.
Let's talk about why—and how to fix it.
Why Running Hurts When Walking Doesn't
The simple answer: Running places demands on your body that walking doesn't.
Here's what makes running different:
Impact Forces
Walking: Your foot contacts the ground with approximately 1.2x your body weight
Running: Your foot contacts the ground with 2.5-3x your body weight
That's more than double the force—absorbed by your feet, ankles, knees, hips, and spine with every single step.
If you have even minor weaknesses, compensations, or movement limitations, running exposes them immediately.
Single-Leg Loading
Walking: You always have one foot on the ground (double-support phase)
Running: You have a flight phase—both feet off the ground—meaning you land entirely on one leg
This requires significantly more:
Single-leg stability
Hip control
Eccentric strength (controlling landing)
Balance and coordination
If your hip or knee can't handle single-leg loading well, running will hurt—but walking won't.
Speed of Movement
Walking: Slow, controlled, predictable
Running: Fast, dynamic, reactive
Your muscles and nervous system have less time to stabilize joints during running. If your movement control isn't sharp, your joints (knees, hips) absorb excessive stress.
Range of Motion Demands
Running requires:
Greater hip extension (leg moving behind you)
More ankle dorsiflexion (shin over toes)
Faster hip flexion (knee drive forward)
Better rotational control
If you lack mobility in any of these areas, your body compensates—often by overloading the knee or hip.
Real Story: From Years of Knee Pain to Running Pain-Free
Dominic Cordeiro's story perfectly illustrates how running reveals issues that walking doesn't.
Dominic had been experiencing intermittent knee pain for about 4-5 years. His knee felt "loose," which:
"Prevented me from running pain free"
Made him "hesitant to wear slippers even for short errands because the back of my knee would hurt even after awhile"
Notice: even walking in slippers (which provide minimal support) triggered discomfort. Running was out of the question.
What he tried first:
Dominic "tried traditional physiotherapy twice but after awhile, found that the same injuries kept returning."
He was understandably skeptical: "I was a little skeptical that anything could be done at first, after all physiotherapy was supposed to be the gold standard right?"
This is a common experience—standard physiotherapy focuses on strengthening the knee, but if the root issue is elsewhere (hip control, foot mechanics, breathing), the pain returns.
What changed at Spheric:
Working with Coach Wee Hoe, Dominic experienced something different from the very first session:
"Within the initial assessment, Coach WH walked through a few breathing exercises and targeted stretches to restore mobility to my body, reducing the knee pain significantly!"
Let that sink in: breathing exercises and targeted stretches—not just knee strengthening—reduced his knee pain significantly in one session.
The result:
"After about 4 sessions, I was able to run pain free!"
Four sessions. Not four months. Not ongoing treatment forever.
But here's the important part: Dominic notes that "there were several times where the pain returned, but a prompt appointment with Coach WH would nudge me back in the right direction :)"
This shows healthy recovery—minor flare-ups are normal, but now Dominic has someone who can quickly identify what's off and get him back on track, rather than the pain becoming chronic again.
Why Coach Wee Hoe's approach worked:
Dominic emphasizes: "Coach WH is also really patient and thorough with his explanations - if you're the kind who really likes to know the 'why' behind your injuries, I strongly recommend you give Spheric a try!"
Understanding why your knee hurts—not just that it hurts—empowers you to prevent problems rather than just react to them.
(Based on verified Google review by Dominic Cordeiro)
Another Success Story: Getting Back to Running After Shin Pain
J M came to Spheric experiencing "pain and tightness in my shin"—another common running injury that doesn't typically appear during walking.
Working with Spheric Human Performance, J M received:
"In depth explanations"
"Tests to check my posture and flexibility"
"A better understanding of how to help myself get back to running"
J M's recommendation: "I would recommend this service to those looking to get back into their sport after injury."
The key theme again: education and understanding, not just temporary treatment.
(Based on verified Google review by J M)
What Actually Causes Running Pain (When Walking Is Fine)
Let's break down the most common culprits:
Culprit #1: Poor Hip Control During Single-Leg Loading
When you run, you land on one leg. Your hip has to:
Stabilize your pelvis
Control your femur (thigh bone)
Prevent your knee from caving inward (valgus)
If your hip muscles (especially glute medius and deep hip rotators) are weak or not activating properly:
Your pelvis drops on the opposite side (Trendelenburg sign)
Your knee caves inward
Your foot collapses (overpronation)
Result: Knee pain—specifically along the outer knee (IT band syndrome) or front knee (patellofemoral pain).
Walking doesn't expose this because you're never fully on one leg with significant impact.
Culprit #2: Limited Ankle Dorsiflexion
Your shin needs to move forward over your foot during the loading phase of running.
If your ankle is stiff (limited dorsiflexion):
Your heel comes off the ground too early
Your calf has to work overtime
Your Achilles tendon is overstressed
Your knee doesn't track properly
Result: Shin splints, Achilles pain, or knee pain.
Again, walking doesn't require as much dorsiflexion, so the limitation doesn't cause symptoms.
Culprit #3: Lack of Hip Extension
Running requires your leg to move behind your body (hip extension).
If your hip flexors are tight or your glutes don't activate well:
You don't extend your hip fully
You compensate by overstriding (reaching too far forward with your leg)
You increase braking forces on your knee
Your lower back overarches to create the illusion of hip extension
Result: Hip pain, lower back pain, or knee pain.
Culprit #4: Breathing and Core Instability
Yes, breathing matters for running pain.
If you breathe shallowly into your chest while running:
Your core can't stabilize properly
Your ribcage stays elevated
Your pelvis tilts forward
Your hip and knee mechanics suffer
This is exactly what Dominic experienced—breathing exercises significantly reduced his knee pain because they restored core stability and pelvic position.
Culprit #5: "Loose" Knee (Poor Proprioception)
Dominic's knee felt "loose"—this is a sign of poor proprioception (your body's awareness of joint position).
After injury or chronic pain, your nervous system's ability to sense and control the knee diminishes. This creates:
Hesitation during movement
Feeling of instability
Difficulty trusting the joint
Walking doesn't require as much proprioceptive control as running—which is why the "loose" feeling is more noticeable during running.
Why Standard Running Advice Often Fails
When people experience running pain, they're usually told:
"Just run slower or shorter distances"
→ Reduces load but doesn't fix the underlying issue"Get better running shoes"
→ Can help slightly but doesn't address movement dysfunction"Strengthen your quads and glutes"
→ Useful, but only if your movement pattern is correct first"Stretch your IT band or hamstrings"
→ Provides temporary relief but doesn't change how you run"Take time off and rest"
→ Pain reduces but returns the moment you start running again
These approaches aren't wrong—they're incomplete.
As Dominic found with traditional physiotherapy, the pain kept returning because the root cause wasn't addressed.
What Actually Fixes Running Pain: The Spheric Approach
At Spheric, we don't just tell you to "rest and strengthen." We identify why running triggers pain and fix it systematically.
Step 1: Comprehensive Running Assessment
We assess:
How do you actually run? (We may ask you to run on a treadmill or outside)
Where do you feel pain during the run?
What's your single-leg stability like?
Can your hips, ankles, and feet move properly?
How do you breathe during running?
Are there asymmetries (one side tighter or weaker)?
This tells us what's breaking down during running that doesn't break down during walking.
Step 2: Address Movement Limitations First
As Dominic experienced, sometimes the solution starts with:
Breathing exercises to restore core stability
Targeted stretches to restore mobility
Hip, ankle, or foot work to improve mechanics
These might seem unrelated to your knee or hip pain—but they're often the missing link.
Step 3: Retrain Running Mechanics
Once limitations are addressed, we teach you how to run differently:
Proper foot strike and loading
Hip drive and extension
Cadence optimization (steps per minute)
Relaxed, efficient breathing while running
Step 4: Gradual Return to Running
We don't just clear you to "go run." We create a progressive plan:
Week 1: Run-walk intervals
Week 2: Increase running duration
Week 3: Add slight intensity or hills
Week 4+: Build toward your goals
This ensures your body adapts without re-injury.
Step 5: Ongoing Support
As Dominic mentioned, there were times when pain returned—but "a prompt appointment with WH would nudge me back in the right direction."
Having someone who can quickly identify what's off and correct it prevents minor setbacks from becoming chronic problems again.
What You Can Try Right Now (3 Self-Assessment Tests)
Want to identify potential issues before your next run?
Test 1: Single-Leg Balance (Eyes Closed)
Stand on one leg with eyes closed
Can you maintain balance for 30 seconds without wobbling excessively?
Does one leg feel less stable than the other?
What it means: If you struggle, your proprioception and single-leg stability need work—both crucial for running.
Test 2: Hip Extension Test (Thomas Test)
Lie on your back at the edge of a bed
Bring both knees to chest
Let one leg hang off the edge while holding the other knee to chest
Does the hanging leg stay flat or does the thigh lift up?
What it means: If your thigh lifts, you have limited hip extension—forcing you to overstride or compensate with your lower back while running.
Test 3: Ankle Dorsiflexion Test
Stand facing a wall, toes about 4-5 inches away
Bend your knee forward—can it touch the wall without your heel lifting?
Compare both sides
What it means: If you can't do this, your ankle mobility is limiting your running mechanics.
Common Running Pain Patterns (And What They Mean)
Pain: Front of Knee (Patellofemoral Pain)
Likely cause: Poor hip control, weak glutes, overpronation
The fix: Hip strengthening, foot stability, gait retraining
Pain: Outer Knee (IT Band Syndrome)
Likely cause: Hip weakness, tight TFL, overstriding
The fix: Hip strengthening, cadence increase, hip mobility
Pain: Inner Knee
Likely cause: Knee valgus (caving inward), weak hip external rotators
The fix: Hip control drills, single-leg stability work
Pain: Hip Flexor or Front of Hip
Likely cause: Limited hip extension, overstriding, anterior pelvic tilt
The fix: Hip flexor releases, glute activation, hip extension drills
Pain: Shin (Shin Splints)
Likely cause: Overpronation, limited ankle mobility, overstriding
The fix: Ankle mobility, calf strengthening, foot stability
When Should You Seek Professional Help?
Consider a running assessment if:
Pain appears consistently during runs but not during walking
You've taken time off but pain returns when you restart running
You've tried rest, stretching, and strengthening with minimal improvement
Pain is getting worse or limiting your running distance
You want to prevent injury as you increase mileage
You're training for a race and want to optimize performance
At Spheric, we work with runners of all levels—from casual joggers to marathon trainers—helping them run pain-free and efficiently.
Ready to Return to Pain-Free Running?
If you're near Beach Road, Bugis, Esplanade, or City Hall, come in for a comprehensive running assessment.
Get Started:
👉 Book your $39 trial assessment
Discover why running hurts when walking doesn't—and get a personalized plan to return to pain-free running.
What's included:
Running gait analysis
Single-leg stability and hip control assessment
Ankle, hip, and foot mobility testing
Breathing and posture evaluation
Clear roadmap to return to running safely
Exercises you can do independently
Location: 43C Beach Road, Singapore 189681 (next to Esplanade MRT)
About Spheric Human Performance
We specialize in helping runners overcome pain and return to their sport stronger and more resilient. Whether you're dealing with knee pain, hip issues, or recurring injuries, we identify the root cause and create a plan that gets you back to running—for good.