📋 What It Is and How It Happens
The anterior cruciate ligament is a structure inside the knee that stops the shin bone from sliding forward and limits rotational movements. The injury more often occurs without contact: with sudden braking, changing direction, landing incorrectly after a jump, or twisting on a fixed foot. Sometimes a pop is heard, and the knee “gives way.” People playing football, basketball, handball, skiing, or engaging in sports with many jumps and direction changes are injured more often.
🔍 Symptoms and First Steps
- Rapidly developing swelling — often within a few hours after the injury.
- Instability: the knee “gives way,” it is difficult to bear weight and turn.
- Pain — from moderate to sharp immediately after the event.
- Decreased range of motion due to pain and swelling.
What to do: stop activity, do not stretch through pain; cold for 15–20 min several times a day through a towel, compression and an elevated limb reduce swelling. Do not try to “pass the tests” yourself — diagnosis requires a specialist’s examination and, if needed, tests (see knee injury).
⚖️ Treatment Options
| Approach | More often used for | What it means in practice |
|---|---|---|
| Conservative treatment and physiotherapy | Lower activity levels, incomplete tear, in selected cases also athletes | A lot of work on muscle strength and movement control; return is slower and depends on daily work |
| Surgical reconstruction and physiotherapy | Active people, recurrent “giving way,” additional injuries | Surgery is only the beginning — the result is determined by rehabilitation over months |
The decision is made by an orthopaedic traumatologist after assessing age, type of sport, degree of instability and other injured structures. A completely torn ligament does not heal on its own, and constant instability can over time damage the meniscus and cartilage, so assessment should not be delayed (see meniscus).
🛡️ Prevention
- Movement control: jump landings and braking are taught separately — the knee must follow the direction of the foot and hip.
- Balance Exercises on one leg and unstable surfaces (see balance exercises).
- Thigh and gluteal strength — weak hamstrings increase the risk (see strengthening exercises).
- Warm-up with acceleration, jumps and direction changes, not just stretching.
- Increase the load gradually — a sudden jump in training volume often precedes injury (see sports injuries).
- Footwear and playing surface: proper grip is important because a slippery surface changes knee loading.
🙋 FAQ
Can you return to sport after a tear? Often yes, but it is a long path: gradual increase in load, strength and jump tests. The result is determined by the quality of rehabilitation, not only by the treatment choice.
Is surgery always necessary? No. The decision is individual: some people manage with conservative treatment, especially if the sport does not require frequent direction changes.
Why is an unstable knee dangerous? Moving in an unstable position increases the likelihood of meniscus and cartilage damage, so avoiding “getting used to” giving way is rarely a good decision.
Does ice heal? Cold helps reduce pain and swelling, but it does not restore the injured ligament — it must be assessed by a specialist (see ice or heat).