Knee Ligament Injuries (ACL, PCL, MCL, LCL)
Knee Ligament Injuries (ACL, PCL, MCL, LCL) cause pain, swelling, and instability after twisting or impact. Physiotherapy, strengthening, balance training, and rehabilitation help restore knee stability and function.
Understanding Knee Ligament Injuries
The knee relies on four major ligaments — the ACL, PCL, MCL, and LCL — for stability. Ligament injuries range from mild sprains (Grade 1) to complete ruptures (Grade 3). They
typically result from sudden twisting, impact, or excessive loading of the knee joint, and are common in contact and pivoting sports.
Causes
- Sudden twisting or pivoting movements
- Direct impact to the knee
- Awkward landings from height
- Falls or motor vehicle accidents
- Excessive valgus or varus stress at the knee
Symptoms
- A popping sensation at the time of injury
- Immediate significant knee pain
- Swelling developing within 24 hours
- Instability — the knee feeling like it may give way
- Difficulty bearing weight
Diagnosis
Assessment includes specific ligament stress tests and joint stability examination. MRI is the gold standard for confirming the ligament involved and the degree of injury. Grade 1–2 injuries are managed conservatively; Grade 3 ruptures often require surgical review.
Treatment
- Early pain and swelling management (ice, rest, compression, elevation)
- Progressive rehabilitation targeting quadriceps, hamstrings, and gluteals
- Neuromuscular and proprioceptive retraining
- Return-to-sport conditioning and agility training
- Post-surgical rehabilitation following ligament reconstruction
Rehabilitation & Exercise
Caution: Perform all exercises only as directed by your Healthweave clinician. Stop any exercise that increases your pain and inform your practitioner. Exercise programs are tailored to individual needs and must not be self-prescribed.
Knee ligament rehabilitation progresses in phases: from early pain management and muscle activation through to full strength and sport-specific conditioning. All exercise progressions are
guided by your clinician.
- Isometric quadriceps and hamstring activation in the early phase
- Progressive knee strengthening — hamstring curls, half squats, and step exercises
- Hip and core strengthening to support knee stability
- Balance and proprioception exercises
- Sport-specific agility and return-to-activity drills
Specialist & Regenerative Medicine Options
For partial ligament tears or chronic instability, our Prestidge sports physicians can offer regenerative treatments that may support ligament healing.
- Platelet Rich Plasma (PRP) therapy — image-guided PRP injection to the ligament injury site to deliver growth factors supporting collagen repair
- Prolotherapy — injection into ligamentous structures to stimulate healing and improve joint stability
- Corticosteroid injections — selective use for acute swelling management to allow earlier rehabilitation
- Stem cell therapy — for significant ligament degeneration within TGA guidelines
Our sports and exercise physicians at Prestidge work alongside your treating clinician to determine the most appropriate option for your condition, goals, and stage of recovery. All
injectable and prescription treatments are subject to individual clinical assessment. Visit healthweave.com.au or prestidge.com to learn more.
Important: All specialist consultations, prescription treatments, and injectable procedures are subject to individual clinical assessment by a registered medical practitioner. Suitability, benefits, and risks will be discussed at your consultation. No outcomes are guaranteed. Prescription medicines are only available following appropriate medical review in accordance with TGA and AHPRA requirements. Exercise programs should be performed only as directed by your Healthweave clinician. Exercise images © CPDO / Educom Pty. Ltd. — used under licence.
Prevention Tips
- Maintain quadriceps and hamstring strength balance
- Include neuromuscular and balance training in fitness programs
- Use proper technique in pivoting and landing movements
- Warm up and cool down thoroughly
- Wear appropriate footwear for your sport