Your quads and VMO
They straighten the knee and control it on the way down. Strong in most athletes. Often doing too much of the work.
Knee Self-Assessment
Knee Pain That Keeps Coming Back? Start Here.
You trained hard. You recovered. And yet the knee keeps flaring back up.
Here is the truth most athletes never get told. It is rarely about weak quads. Even athletes who squat huge numbers still get knee pain. Not because they are weak. Because their muscles are not firing together at the right time.
Your knee is caught in the middle. When the team around it shares the load, the knee is fine. When it does not, the knee takes stress it was never meant to carry.
The Basics
Meet The Team Around Your Knee
Keep this simple. A few key players decide how your knee feels.
Your soleus
It accepts load every time your foot hits the floor. When it goes quiet, you sink a little with every step, and that load travels up to the knee.
Your hamstrings and glutes
They are meant to share the load and let the hip do its job. When they switch off, the front of the knee picks up the slack.
When these share the work, the knee feels effortless. When the front dominates and the back goes quiet, that is when the knee starts to complain. Most of what you will do on this page is about getting the back of the chain doing its share again.
Find Your Issue
What Does Your Knee Actually Feel Like?
Pick the one that fits you best. It points you to the right checks below.
01Check First
Pain and swelling
A full, puffy, or warm knee. Start with the Pathology Assessments.
Start with the pathology checks 02CoordinationFront of the knee
Pain around or under the kneecap, or on the tendon below it. Common with running, squatting, and stairs.
Go to coordination 03CoordinationBack of the knee
Tightness or ache behind the joint, often with the calf and hamstring.
Go to coordination
Pathology Assessments
Knee Assessment: Signs You Need A Professional
Is It Something To Get Checked?
Before anything else, we rule out the things that need a professional eye. These checks do not diagnose anything. They tell you whether it is sensible to get it looked at before you load it.
The Sweep Test (for swelling)
Swelling inside the joint is one of the clearest signs to slow down and get checked. Here is a simple way to look for it at home.
- Sit with your leg out straight and completely relaxed.
- With a flat hand, stroke firmly up the inside of your kneecap, from just below the knee toward your thigh, two or three times. You are trying to push any fluid up and out of the pocket on the inside of the knee.
- Now stroke down the outside of the knee, from the thigh back toward the kneecap.
- Watch the little hollow on the inside of the knee, just next to the kneecap.
Nothing appears
No bulge or wave of fluid. Swelling is unlikely. Move on to the coordination checks.
A bulge appears
A wave of fluid in that hollow points to an effusion. That is a red flag. Stop, and get it assessed before you load it.
What you are looking for. A small bulge or a wave of fluid appearing in that hollow as you stroke down.
The Red Flag Check
Even without obvious swelling, some signs mean stop and get it looked at. Tick any of these and book an assessment.
- The knee feels full, or like there is swelling inside the joint.
- Sudden swelling or bruising, usually after a specific moment where you felt it go.
- Locking or catching, or you cannot fully bend or straighten it.
- The knee gives way, or feels like it is about to.
- Sharp pain that stops you doing normal activity.
A word on locking. True locking is a mechanical block, where the joint physically cannot straighten because something is in the way. That needs prompt medical attention. For most athletes though, what feels like locking is the muscles guarding, often alongside some swelling. Different thing entirely.
When in doubt, get it checked.
These checks are for peace of mind and understanding your body. They are not a diagnosis and they do not replace medical advice. If you have real swelling, true locking, or the knee is giving way, stop training and see a doctor or physio.
If nothing above fits you, your knee pain is far more likely muscular and about coordination. That is good news, and it is exactly what the next part is for.
Coordination Assessments
Is Your Body Sharing The Load?
No red flags? Then the question changes. It is not "what is damaged". It is "who has stopped doing their job". This check shows you whether the back of your chain is sharing the load, or leaving it all to the front.
The Midfoot Bridge Check
This is the one to start with. It tells you whether your soleus and hamstrings will accept load without your back or your quads taking over.
- Lie on your back, knees bent, feet flat, weight on the balls of your feet.
- Lift your hips just an inch off the floor. That is all. Not a big bridge.
- Hold that tension through your midfoot and feel where the work is.
A good result
You feel the work in your hamstrings and deep in your calf. Your hips stay level. You can hold it without arching your lower back.
A poor result
The work dumps into your lower back, or into the front of your thighs. Your weight rolls back to your heels. Your hips drop or twist. This is the pattern that keeps loading your knee. It is also exactly what the drills below retrain.
Get The Basics Right
The Drills
These are the exact drills we use in our clinics to get the team around the knee working together again. Do them in order. Each phase earns the next. Keep everything pain free.
1
Isometrics
Wake it up.Midfoot Foam Roller Bridge
Restores the connection between your foot, ankle, knee, and hip, so force transfers cleanly through the whole chain.
Cue. Push through the ball of your foot, hips only an inch up. Do not let your weight roll back to your heels.
2
Load Tolerance
Share the load.Midfoot Bridge with Hip Shifts
Teaches your nervous system it is safe to hold load through the midfoot while adding controlled side to side movement.
Cue. Stay just an inch off the floor. Keep contact through the ball of your big toe as you shift.
Soleus Slouch
Restores the co-contraction around the knee so the hip can do more of the work.
Cue. Slight knee bend, weight over the midfoot, neck and shoulders relaxed. Do not let the knee snap back or your weight drift to your heels.
Adductor Magnus Bridge with Hip Shift
Brings your inner hamstring and thigh back into the job of controlling the hip.
Cue. Keep an inch of clearance and hold pressure through the heel.
3
Deceleration Tolerance
Control it.Slouch Walking Lunges
Takes the co-contraction and adds movement through space, the way real sport demands.
Cue. Stay low in the tunnel, do not stand up between steps, keep the upper body relaxed.
Single Leg Reverse Plank
Loads the back of the knee, the calf and the hamstring together in high tension, where they have no choice but to work.
Cue. Only an inch of clearance, hold pressure through the heel.
Progress
Knee Pain Recovery: How To Know The Drills Are Working
The movement starts to feel automatic. Less thinking, less monitoring.
You feel the work shift to your calf, hamstrings and glutes, not the front of the knee.
The knee complains less during and after your sessions.
You can hold the drills longer, and they start to feel easy.
When to progress
When a drill feels easy and clean, move to the next phase. Easy is the signal. If it still feels like a fight, stay where you are.
When to get help
If the pain is not settling after a couple of weeks of honest work, or any red flag from the pathology checks shows up, get it assessed.
Your Sport
Knee Pain By Sport: Hyrox, CrossFit and Running
Hyrox
Burpee broad jumps and wall balls need the knee through full range. If the quads and knee capsule lose length, and the soleus, hamstrings and glutes do not do enough, we see patellofemoral pain, quad and patellar tendon issues, and meniscus strains from twisting.
CrossFit
Similar to Hyrox, with the added Olympic lifting demand on ribcage and shoulder mobility. When those areas do not do their share, we see jumper's knee, IT band type symptoms, and ligament or meniscus microtrauma.
Running and marathon
Less full range needed, same culprits. Soleus, hamstrings, quads and glutes have to share the work at different speeds. When they do not, we see patellofemoral pain, outer knee symptoms, and degeneration from repetitive load.
Next Step
Where To Go Next
01One To One
Book A ProSport Online Assessment
Want certainty, or ticked a red flag? We find the root cause with you, online or in person.
Book now 02RehabGo To The Rehab Drills
The full library of drills we use in clinic.
Open the library 03ReadWhy Your Knee Pain Keeps Coming Back
The coordination story in full.
Read the article 04BrowseBack To All Body Parts
Something else bothering you? Pick another area from the full list.
All self-assessmentsYour knee is not fragile. It has just been carrying work that belongs to the rest of the chain. Give that work back, and it settles.