My Knee Clicks and Aches When I Squat — What's Going On?

Clicking on its own usually isn't the problem. It's clicking plus an ache around the front of your knee, especially at the bottom of a squat or on the way back up, that's actually worth paying attention to. Here's what's likely going on.

What's causing it

This combination, front-of-knee ache with clicking or grinding on loaded knee bend, is the classic presentation of patellofemoral joint pain, sometimes called "runner's knee" even though it's just as common in lifters. It happens where your kneecap (patella) glides against the groove in your thigh bone as your knee bends.

When your kneecap isn't tracking perfectly centred through that groove, often due to muscle imbalances around the hip and thigh rather than anything wrong with the knee joint itself, it creates extra friction and irritation right where you're feeling it. The clicking is usually that slightly uneven tracking, not damage.

Why it happens specifically on squats

Squatting loads the patellofemoral joint more than most other movements, particularly through the bottom half of the range where your knee is most bent. This is exactly why it shows up here first, even if the underlying cause is really about hip and thigh muscle balance rather than the squat itself being the problem.

Common contributing factors

• Weak hip muscles (particularly glute medius) letting your knee drift inward during the squat

• Quad imbalance where the outer thigh muscle overpowers the inner, pulling the kneecap slightly off its ideal track

• Rapid increases in training load more squat volume or weight than your knee has adapted to yet

• Foot and ankle mechanics that change how load travels up through the knee

How long will this take

With the right approach, most people see a genuine reduction in pain within a few weeks, though full resolution and a return to squatting at full load without any ache typically takes six to twelve weeks. It responds very well to treatment, but it does need an actual plan rather than just backing off and hoping.

Should you stop squatting

Usually not entirely. Complete rest tends to just delay the problem rather than fix it, since the muscle weaknesses driving the issue don't improve by avoiding load altogether. Most people can keep training with modified depth, load, or tempo while the underlying strength deficits get addressed.

How physio helps

Assessment looks at how your hip, knee, and ankle move together through a squat, not just the knee in isolation, since the actual driver is very often above or below the joint that's hurting. From there, treatment typically combines hands-on work to settle irritation with targeted strengthening, usually hip and glute focused, aimed at correcting the tracking issue rather than just easing the pain temporarily.

For gym-based patients, we can watch you actually squat and pinpoint exactly where the mechanics break down, which is far more useful than generic advice about "knee stability." Where appropriate, reformer Pilates is also a genuinely useful tool here, since it lets you keep training strength and control through the hip and knee in a lower-impact, closely supervised setting while things settle.

Book an assessment

If your knee's been clicking and aching on squats for a while now, it's worth getting the actual cause identified rather than just working around it. Book online or call 0450 075 955. Read more about how we treat knee pain, our sports and gym rehabilitation, or our reformer Pilates program.

This article is general information, not a substitute for individual medical advice.