Short answer
Sandbag lunges and wall balls are high-rep, deep-knee movements done when your legs are already tired. Knee pain from them is usually patellofemoral pain around the kneecap or patellar tendon pain below it. Both improve with smart volume and progressive leg strength, without stopping training entirely.
Common causes
Patellofemoral pain
Ache around or behind the kneecap, worse on stairs and deep bending.
Patellar tendinopathy
Pain just below the kneecap, worse with jumping and loaded squats.
Volume when fatigued
100 metres of lunges after kilometres of running.
What usually helps right now
- Reduce lunge distance and wall-ball reps temporarily.
- Use slow, heavy leg strength work, such as split squats and leg press.
- Keep running and the other stations if they are comfortable.
What to avoid
- Racing simulations at full volume while sore.
- Kneeling hard on the knee during lunges.
When to book an assessment
- Pain is lasting more than two weeks.
- You are compensating at race pace.
Get urgent medical care if
- Rapid swelling, locking or the knee giving way.
How we treat it
- AssessHistory, movement and clinical tests, with screening for anything that needs a doctor.
- ExplainA clear diagnosis in plain language, and what recovery usually looks like.
- TreatHands-on care where it helps: joint and soft tissue work, dry needling or adjustments.
- RebuildExercises and a training plan so it holds up, with an end point.
Questions
Should I wear knee sleeves?
Sleeves can make the knee more comfortable. Strength work is what changes it.
How do I train lunges for HYROX without knee pain?
Build total volume gradually across weeks, with strength work in between.