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Health condition · Clinically reviewed

Knee sports injuries, from the pop on the pitch to the ache in the miles.

Not just a bruised knee. A specialist sports-medicine approach - imaging, physiotherapy and, where needed, reconstructive surgery - gets athletes safely back to sport.

Jump to treatment
A radiographer guides a patient onto the bed of an advanced 3 Tesla MRI scanner in a London imaging suite

Why trust this guide

  • 01

    Clinically reviewed

    Written by our editorial team and reviewed by a registered UK clinician before publication.

  • 02

    Sourced from guidance

    Checked against BASEM, BASK and peer-reviewed sources you can see at the end.

  • 03

    Current for 2026

    Reflects modern UK sports-medicine practice including ACL reconstruction, meniscal repair and criteria-based return to sport.

Key facts

Knee sports injuries at a glance.

The essentials, in plain English - the common injuries, who gets them and how a specialist sports-medicine team pieces the picture together.

  • What it is

    A group of athletic knee injuries that share pivoting, landing or overuse mechanisms and often present with swelling, pain or instability.

  • Ligament injuries

    ACL rupture is the classic non-contact pivoting injury in football, rugby, skiing, netball and basketball, with a well-recognised female predominance.

  • Meniscus and cartilage

    Meniscal tears and focal chondral injuries often coexist with ligament injuries and drive locking, catching and effusion.

  • Overuse injuries

    Patellofemoral pain, patellar tendinopathy, iliotibial band syndrome and medial plica syndrome dominate in runners, cyclists and jumpers.

  • Paediatric variants

    Osgood-Schlatter and Sinding-Larsen-Johansson are traction apophysitides seen in growing athletes and settle with load management.

  • Specialist care

    A specialist commissioned sports-medicine and orthopaedic MDT combines imaging, physiotherapy and, where needed, reconstructive surgery.

Why this guide matters

A specialist plan, not a bag of ice.

Sports knee injuries are common, treatable and - with the right specialist commissioned team - usually compatible with returning to the sports you love. The three points below shape everything else on this page.

  • Specialist physiotherapy is foundational

    A specialist sports-physiotherapy programme is the single most important step in almost every knee sports injury (see /treatments/spinal-physiotherapy/).

  • MRI drives the plan

    A specialist musculoskeletal MRI (see /treatments/private-mri-scan/) clarifies ligament, meniscal and cartilage injury and shapes the decision to operate.

  • Surgery is targeted and criteria-led

    ACL reconstruction (see /treatments/acl-reconstruction/) and meniscal repair (see /treatments/meniscal-repair/) are used selectively, with criteria-based return to sport supervised by a specialist commissioned MDT.

How the diagnosis is made

From the moment of injury to a clear plan.

The steps a UK specialist sports-medicine or orthopaedic team will normally follow, in order - so you know what to expect and why.

  1. 01

    Assessing

    History and sport-specific mechanism

    What sport, what movement, what noise or pop, immediate swelling or delayed - the story usually points to the injured structure.

  2. 02

    Assessing

    Red flag screen

    Locked knee, inability to weight-bear, haemarthrosis, fever or neurovascular deficit prompt urgent assessment.

  3. 03

    Assessing

    Structured examination

    Lachman and pivot-shift for ACL, valgus and varus stress for MCL and LCL, dial test for PLC, McMurray and joint-line tenderness for meniscus, patellar tracking and apprehension for patellofemoral disorders.

  4. 04

    Confirming

    Imaging - MRI first-line

    A specialist musculoskeletal MRI (see /treatments/private-mri-scan/) is the workhorse for ligament, meniscal and cartilage injury, often with an MR arthrogram when subtle chondral or labral pathology is suspected.

  5. 05

    Confirming

    Weight-bearing radiographs

    Plain films rule out fracture, tibial spine avulsion, loose bodies and pick up alignment issues that shape surgical planning.

  6. 06

    Planning

    MDT sports-medicine review

    A specialist commissioned MDT of sports physicians, orthopaedic surgeons and specialist sports physiotherapists agrees a management plan and a return-to-sport pathway.

  7. 07

    Planning

    Baseline function and goals

    Objective testing - strength, hop tests, single-leg control - sets the benchmark against which recovery and return-to-sport criteria are measured.

Typical timeline: a specialist opinion within days, a full plan in a couple of weeks.

Presentation

What sports knee injuries actually look like.

The mechanism plus the pattern of swelling, pain and instability usually points to the injured structure - and to the specialist musculoskeletal pathway that suits it best.

  • Sudden pop with swelling

    A classic ACL story - non-contact pivot, an audible pop and a tense haemarthrosis within hours.

  • Valgus or varus mechanism

    A blow to the outside of the knee stresses the MCL; a rarer blow to the inner side or hyperextension threatens the LCL and PLC.

  • Locking or catching

    Mechanical symptoms suggest a meniscal tear or a loose osteochondral fragment and warrant early imaging.

  • Anterior knee pain in runners

    Patellofemoral pain syndrome - vague pain around or behind the kneecap, worse on stairs, hills and prolonged sitting.

  • Jumper's knee

    Focal tenderness at the inferior pole of the patella after repetitive jumping - the hallmark of patellar tendinopathy.

  • Lateral knee pain in distance runners

    Iliotibial band syndrome - burning pain over the lateral femoral condyle that comes on at a predictable mileage.

  • Medial catching and clicking

    Medial plica syndrome - a snapping band of synovial tissue that mimics a small meniscal tear.

  • Red flag - locked knee or haemarthrosis

    A knee that will not straighten, or one that swells rapidly with tense fluid, needs same-day specialist assessment.

Treatment

How sports knee injuries are treated in the UK.

Specialist sports physiotherapy first, targeted injections and shockwave next - and reconstructive surgery for the unstable, locked or non-healing knee, guided by BASEM and BASK.

  • PRICE and relative rest

    Protection, relative rest, ice, compression and elevation in the first 48 to 72 hours reduce swelling and pain and set the stage for early rehabilitation.

  • Analgesia and NSAIDs

    Short-course paracetamol and NSAIDs help control pain and effusion so that physiotherapy can start early.

  • Specialist sports physiotherapy

    The single most important intervention for almost every knee sports injury - progressive loading, neuromuscular control and sport-specific drills (see /treatments/spinal-physiotherapy/).

  • Targeted injections

    Ultrasound-guided steroid or PRP injections (see /treatments/steroid-injection/) have a role in selected tendinopathies and stubborn joint inflammation as part of a specialist musculoskeletal plan.

  • Shockwave therapy

    Extracorporeal shockwave (see /treatments/shockwave-therapy/) is a useful adjunct in chronic patellar tendinopathy that has failed loading programmes.

  • ACL reconstruction

    Arthroscopic ACL reconstruction (see /treatments/acl-reconstruction/) is a specialist commissioned procedure for functionally unstable knees or high-demand athletes (see /conditions/knee-ligament-injury/).

  • Meniscal repair or debridement

    Where the tear pattern allows, meniscal repair (see /treatments/meniscal-repair/) preserves the meniscus; otherwise a limited debridement is used (see /conditions/knee-meniscal-tear/).

  • Cartilage restoration

    Focal chondral defects may be managed with microfracture, osteochondral grafting or cell-based cartilage restoration (see /conditions/knee-cartilage-injury/).

What this guide is based on

The sources behind every claim on this page.

UK national guidance and specialist society standards, current at the time of last review.

Key references

Guidelines and standards we relied on.

A quiet reminder

This guide is for information, not medical advice.

Your GP or specialist sports physician knows your knee and your sport and can tell you which parts apply to you. If in doubt, get seen.

  • British Association of Sport and Exercise Medicine (BASEM). Guidance on musculoskeletal and sports injury management.

  • British Association for Surgery of the Knee (BASK). Consensus statements on ACL, meniscal and cartilage surgery.

  • NICE. Osteoarthritis and joint problems - guidance on assessment and imaging.

  • FIFA Medical. FIFA 11+ neuromuscular training programme.

Red flags

When a knee injury needs urgent attention.

Most sports knee injuries can be worked up over days rather than hours. These are the situations that cannot - and where a specialist opinion is needed straight away.

  • Locked knee

    A knee that cannot be fully straightened suggests a displaced meniscal fragment or loose body and needs early specialist review.

  • Tense haemarthrosis

    Rapid, tense swelling within hours of injury strongly suggests ACL rupture, osteochondral fracture or patellar dislocation.

  • Inability to weight-bear

    A knee that will not take weight after acute trauma warrants weight-bearing radiographs and specialist assessment.

  • Neurovascular compromise

    Any change in pulses, sensation or foot movement after a knee injury is a surgical emergency - think knee dislocation until proven otherwise.

  • Suspected stress fracture

    Persistent bony pain, night pain or a limp in a running athlete needs specialist review to exclude a tibial or femoral stress fracture.

  • Paediatric red flags

    Effusion, night pain or systemic features in a child raise concerns beyond simple growing pains (see /conditions/growing-pains-in-children/).

  • Recurrent instability

    Repeated giving-way, especially on pivoting, points to unresolved ACL or patellar instability and reconstructive options.

  • Failed conservative care

    Sports knee pain that has not settled with a structured physiotherapy programme deserves an MRI and a specialist musculoskeletal opinion.

  • Systemic symptoms

    Fever, weight loss or a hot swollen knee point away from a simple sports injury and towards septic arthritis, inflammatory disease or malignancy.

Living with it

A treatable condition, with a clear return-to-sport ladder.

Four things that make the biggest difference day to day - managing load, building strength, meeting criteria before returning to sport and warming up like an athlete.

A quiet reminder

Rehabilitation is training, not just recovery.

The knees that come back strongest are usually the ones whose owners treat rehabilitation as seriously as they treat matchday.

  1. 01 Load

    Manage load, do not chase pain

    Adjust volume and intensity around symptoms and use a graded return - big weekly jumps are the commonest cause of setbacks.

  2. 02 Strength

    Build a strong, controlled leg

    Quadriceps, hamstring, hip and calf strength - together with single-leg control - underpin nearly every successful knee rehabilitation.

  3. 03 Criteria

    Return to sport by criteria, not calendar

    Time alone does not predict readiness - strength symmetry, hop tests and confidence markers should meet specialist benchmarks first.

  4. 04 Prevent

    Warm up like an athlete

    Structured neuromuscular programmes such as FIFA 11+ reduce ACL and knee-injury risk by around a third when used consistently.

Frequently asked

Everything we get asked about sports knee injuries.

Quick answers on ACL, meniscus, tendon and overuse injuries and on returning to sport.

  • What are knee sports injuries?

    A group of athletic knee problems ranging from acute ligament ruptures - such as ACL, MCL, PCL, LCL and posterolateral corner injuries - to meniscal and cartilage tears, patellar and quadriceps tendinopathy, patellofemoral pain, iliotibial band syndrome, medial plica syndrome, paediatric traction apophysitides such as Osgood-Schlatter and stress fractures. They share pivoting, landing or overuse mechanisms and are usually managed by a specialist commissioned sports-medicine and orthopaedic team.

  • How do I know if I have torn my ACL?

    The classic story is a non-contact pivoting injury in football, rugby, skiing, netball or basketball with an audible pop, immediate swelling and a knee that feels unstable when changing direction. There is a well-recognised female predominance. A specialist examination with Lachman and pivot-shift tests followed by an MRI (see /treatments/private-mri-scan/) confirms the diagnosis and guides whether specialist commissioned ACL reconstruction is appropriate (see /conditions/knee-ligament-injury/).

  • Do all meniscal tears need surgery?

    No. Many stable degenerative and small traumatic tears settle with a specialist sports-physiotherapy programme, activity modification and analgesia. Repair is preferred over debridement where the tear pattern, location and blood supply allow, particularly in younger athletes and alongside ACL reconstruction (see /conditions/knee-meniscal-tear/ and /treatments/meniscal-repair/).

  • What is jumper's knee?

    Jumper's knee is patellar tendinopathy - a load-related tendon injury from repetitive jumping in sports such as basketball, volleyball and netball. It usually responds to a structured heavy, slow resistance programme delivered by a specialist sports physiotherapist, with shockwave or targeted injections reserved for stubborn cases (see /conditions/knee-tendonitis/).

  • What is iliotibial band syndrome?

    Iliotibial band syndrome is a common overuse injury in distance runners and cyclists that causes lateral knee pain over the femoral condyle. Management is almost entirely non-surgical, with load management, hip and gluteal strengthening, running gait retraining and, occasionally, a targeted injection (see /conditions/iliotibial-band-itb-syndrome/).

  • When can I return to sport after a knee injury?

    Return to sport is driven by criteria rather than the calendar. Alongside symptom resolution, a specialist sports-medicine team looks for near-symmetrical strength, passing single-leg hop tests, restored neuromuscular control and psychological readiness - benchmarks agreed by BASEM and BASK guidance. Preventive programmes such as FIFA 11+ then reduce the risk of re-injury.

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