I jumped, felt my knee give way, and now I can't lift my leg. What happened?

Why you cannot lift your leg

Lifting a straight leg depends on an unbroken chain: the quadriceps muscle, the quadriceps tendon, the kneecap and the patellar tendon, which attaches to the shin. If any link in that chain snaps, the muscle can still contract but it no longer pulls on the shin, so the leg stays on the bed.

The usual story is a sudden, forceful contraction of the thigh with the knee partly bent, for example landing from a jump in basketball or volleyball, missing a step, or catching yourself during a stumble. Many people describe a pop or tearing feeling, then the knee folding under them.

A quick check you can do now

Lie on your back and try to lift the injured leg a few centimetres off the bed with the knee fully straight. Then compare the front of both knees.

• You cannot lift the leg, or the knee bends as you try
• A dip or soft gap just above or just below the kneecap
• The kneecap looks higher or lower than on the other side
• Swelling and bruising developing over a few hours

Any of these makes a tendon rupture more likely. Do not keep testing it repeatedly, and do not try to walk it off.

What to do today

Keep the knee straight, ideally in a splint or a straight-leg brace, use crutches if you have them, apply ice wrapped in a cloth, and keep the leg raised. Avoid bending the knee to test it.

Go to an emergency department or arrange an urgent orthopaedic review in Doha. You need an examination and usually an X-ray, with ultrasound or MRI if the picture is unclear. Severe pain, a deformed knee, numbness in the foot or a very cold foot needs the emergency department straight away.

What happens at Aman Hospital

Dr. Gelber examines the extensor mechanism, checks whether the tear is partial or complete, and reviews imaging. A complete rupture is usually repaired surgically, ideally within days to a couple of weeks. A partial tear with the ability to lift the leg straight may be treated in a brace. Either way, the plan is decided after examination, not over the phone.