Knee pain going downstairs — but not up — is one of the most common and specific pain complaints I hear from clients across Barnoldswick, Earby, Skipton, and the Pendle and Craven area. It's also one of the most mismanaged, because most people assume it's a knee problem when it's usually a hip and quad control problem.
This article explains exactly why descending stairs hurts but climbing them doesn't, what's actually causing the pain, and what a proper programme to fix it looks like.
Why Downstairs Hurts More Than Upstairs
The difference between going up stairs and going down stairs is the direction of force. Going up, your muscles shorten to produce force (concentric contraction). Going down, your muscles have to lengthen under load to control your descent (eccentric contraction). Eccentric loading is significantly more demanding on the tissues — and it exposes any weakness or instability that uphill movement can mask.
When you descend a staircase, your knee has to:
- Accept the full weight of your body on a single leg
- Control a slow, loaded bend through a significant range
- Stay aligned while your hip and ankle absorb force simultaneously
If any part of that chain is weak, stiff, or poorly coordinated, the knee takes the strain. The pain is felt at the knee — but the cause is almost always upstream or downstream of it.
The Three Most Common Causes
1. Weak Glutes and Poor Hip Control
This is the most common cause I find when assessing clients across Barnoldswick, Earby, and the surrounding area. When the glutes aren't doing their job properly, the femur (thigh bone) drops inward as you descend the step — a movement called dynamic valgus or "knee collapse." This inward drop changes the angle at which the patella (kneecap) tracks in its groove, creating friction, pressure, and pain.
The telltale signs of this pattern:
- Your knee visibly moves inward as you step down
- The pain is at the front of the knee, around or behind the kneecap
- It's worse when you're tired
- Your hip drops on the descending side
The fix isn't to stretch the knee. It's to build glute medius strength — the outer hip muscle that stabilises the pelvis and prevents the femur from collapsing inward.
2. Quad Weakness — Particularly Eccentric Quad Strength
Your quadriceps are the primary shock absorber for stair descent. If they're weak in their lengthening phase — which is tested far more on the way down than the way up — they can't control the speed and depth of your knee bend effectively.
This is extremely common in people who have had a previous knee injury, who have been inactive for a period, or who are over 40 and haven't maintained quad strength deliberately. It's also common in post-surgical clients who completed the basic rehab exercises but never progressed to proper eccentric loading.
Why This Matters After Physiotherapy
Standard physio exercises (quad sets, straight leg raises, gentle knee bends) rarely train the eccentric loading that stairs demand. Many people complete their physio, get discharged, and then find stairs are still painful. The gap is almost always eccentric strength.
3. Stiff Ankle — Limited Dorsiflexion
This one surprises people. When the ankle can't flex adequately — a restriction called limited dorsiflexion — the body compensates by collapsing the knee inward or shifting the load in ways that increase knee stress. Tight calves, previous ankle sprains, and prolonged periods of reduced activity can all contribute to ankle stiffness that shows up as knee pain on stairs.
It's easy to miss because the ankle doesn't hurt. The pain is at the knee. But if you assess someone with stair-related knee pain and find restricted ankle dorsiflexion, addressing the ankle often produces rapid improvement in the knee symptoms.
What's Usually Not Causing It
Before getting into what to do, it's worth clearing up some common misconceptions:
"It must be cartilage wear"
Cartilage degeneration is extremely common on imaging — but correlation isn't causation. Many people with significant cartilage changes on MRI have no knee pain, and many people with significant knee pain have minimal cartilage changes. The pain pattern described here (specifically worse descending stairs) is a mechanical and muscular problem in the vast majority of cases, not a structural one.
"It's just arthritis — nothing can be done"
Osteoarthritis of the knee is common, particularly in people over 50, but it responds well to targeted exercise — often better than any other treatment. Muscle strengthening around the knee joint reduces the load on the joint surfaces and consistently reduces pain, regardless of the degree of arthritis visible on X-ray.
"I just need to rest it"
Rest reduces irritation in the short term but does nothing to address the weakness and control deficits that are causing the problem. The knee will hurt again when you return to stairs. Progressive loading — done correctly — is what produces lasting change.
What a Proper Programme Looks Like
Resolving stair-related knee pain requires addressing all three of the main causes — hip control, eccentric quad strength, and ankle mobility — not just the most obvious one.
Phase 1: Hip and Glute Strengthening
Exercises targeting the glute medius and posterior chain to restore proper hip control during single-leg loading. Side-lying clamshells, lateral band walks, and single-leg bridges are typically starting points — progressed gradually over weeks.
Phase 2: Eccentric Quad Loading
Slow, controlled single-leg lowering progressions that specifically train the quadriceps in their lengthening phase. Step-downs with a focus on control and alignment, progressed from a low step height initially. This is the phase most people skip — and the one most responsible for lasting improvement.
Phase 3: Ankle Mobility and Integration
Addressing any ankle dorsiflexion restriction, combined with movement pattern work that integrates hip, knee, and ankle control during loaded descent.
Phase 4: Progressive Stair-Specific Loading
Returning to stairs directly — starting with lower steps, controlling speed, and progressively increasing challenge as the tissues adapt. This phase is where the improvements in the gym transfer to the actual movement that was causing pain.
Knee Pain Going Downstairs in Your 40s, 50s and 60s
For many clients in Barnoldswick, Earby, and the wider Pendle area, stair-related knee pain is something that's crept up gradually over years — getting slightly worse each winter, slightly better in summer, until it's a permanent feature of daily life.
It doesn't have to be. The causes I've described above are all directly addressable at any age. People in their 50s and 60s regularly resolve long-standing stair pain through a targeted strength programme — not because they got younger, but because their muscles finally started supporting the joint the way they're supposed to.
Read more about strength training for people over 40 — and why it becomes more important, not less, as stair pain and other movement problems emerge.
After a Knee Replacement or Surgery
Stair descent is one of the last functional movements to fully recover after knee surgery — and one of the most common complaints at physiotherapy discharge. The basic exercises given post-operatively are rarely sufficient to fully restore the eccentric strength and hip control needed for confident, pain-free stair descent.
If you've had a knee replacement or surgery and stairs are still uncomfortable, this is exactly the kind of gap that in-home functional training is designed to fill. Read more about why pain sometimes returns after physiotherapy and what comes next.
Getting Assessed
A thorough movement assessment for stair-related knee pain includes:
- Single-leg squat and step-down testing to identify the movement pattern causing pain
- Hip strength and stability assessment
- Ankle dorsiflexion measurement
- Observation of your actual staircase in your home
- A specific programme built around what's actually causing your pain — not a generic knee protocol
Paul Sudds provides in-home assessments and training across Barnoldswick, Earby, Skipton, Colne, Gargrave, and the wider Pendle and Craven area. Your staircase is part of the assessment — because that's where the problem actually happens.
To book your assessment, get in touch here or call Paul directly on 07511 236885.
You can also read about what happens during an in-home movement assessment, explore the Earby in-home training page, or learn how the programme works.
