An ACL tear causes immediate knee pain, swelling, and instability, often accompanied by a popping sensation at the time of injury. Treatment ranges from physiotherapy and bracing for partial tears to surgical reconstruction for complete tears in active individuals. Recovery to full sporting activity typically takes 9 to 12 months.
What is an ACL Injury and Who Does It Affect?
The anterior cruciate ligament (ACL) is one of the four major ligaments of the knee, running diagonally through the middle of the joint. It plays a critical role in controlling rotational movement and preventing the tibia (shinbone) from sliding forward relative to the femur (thighbone).
An ACL injury occurs when this ligament is overstretched or torn, most commonly during sudden pivoting, landing from a jump, or a direct impact to the knee. It is one of the most common sports-related knee injuries, but it can also occur during everyday activities involving sudden changes in direction.
ACL injuries affect athletes across all sports, particularly football, basketball, and cricket, as well as physically active individuals of all ages. Women are statistically at a higher risk of ACL tears than men, attributed to differences in anatomy, muscle strength, and movement patterns.
Symptoms of an ACL Injury
Recognising an ACL Tear
Symptoms of an ACL injury are usually immediate and hard to ignore.
Common symptoms include:
- A loud pop or snapping sensation in the knee at the time of injury.
- Severe pain and inability to continue the activity.
- Rapid swelling of the knee typically occurs within a few hours of the injury.
- A feeling of instability or the sensation of the knee giving way when bearing weight.
- Limited range of motion due to pain and swelling.
- Tenderness along the joint line.
Swelling that develops within the first few hours is often a sign of bleeding within the joint (haemarthrosis), which is common in ACL tears. Chronic ACL deficiency, when an old, untreated tear is present, may present as recurrent episodes of the knee giving way during activity, even without significant pain.
Consult an orthopaedic specialist promptly if you experience a popping sensation in the knee followed by swelling and instability, particularly after a sports injury or fall.
Causes and Risk Factors for ACL Injuries
ACL injuries are typically caused by non-contact mechanisms rather than direct blows to the knee.
Common causes include:
- Sudden change of direction or pivoting with the foot planted.
- Hard landing from a jump with the knee in an extended or inward position.
- Sudden deceleration while running.
- Direct collision or contact with the knee, such as a tackle in football.
- Hyperextension of the knee joint.
Factors that may increase the risk of an ACL injury include:
- Participation in high-intensity or contact sports.
- Due to anatomical and hormonal factors, females are at higher risk.
- Previous ACL injury or reconstruction.
- Poor neuromuscular control or inadequate core and hip strength.
- Wearing inappropriate footwear for the playing surface.
How is an ACL Injury Diagnosed?
At SGVP Holistic Hospital, diagnosis begins with a detailed clinical examination followed by imaging to confirm the extent of the injury.
- Physical Examination: The Lachman test and anterior drawer test are used to assess ligament stability and detect abnormal forward movement of the tibia.
- MRI Scan: An MRI provides detailed images of the knee’s soft tissues, confirming an ACL tear, assessing its severity, and identifying any associated damage to the meniscus or other ligaments.
- X-Ray: While X-rays do not show ligament damage, they are used to rule out associated bone fractures.
Accurate diagnosis is essential before any treatment decision is made, as partial and complete tears are managed differently.
ACL Injury Treatment Options
Treatment for an ACL injury depends on the severity of the tear, the patient’s age, activity level, and the presence of any associated knee injuries.
Non-Surgical Treatment
Partial ACL tears and complete tears in older, less active individuals may be managed without surgery. Conservative treatment focuses on restoring knee strength, stability, and function through:
- Physiotherapy: A structured program targeting quadriceps, hamstrings, and hip strengthening to compensate for ligament laxity and reduce instability.
- Bracing: A functional knee brace may be recommended to provide additional support during activity.
- Activity Modification: Avoiding high-risk movements and sports that place excessive rotational demand on the knee.
Conservative management is appropriate for selected patients, but it does not restore the mechanical function of a completely torn ACL. Patients who continue to experience instability despite rehabilitation are typically advised to consider surgery.
ACL Reconstruction Surgery
Complete ACL tears in active individuals, particularly those wishing to return to sports, are best treated with surgical reconstruction. The torn ligament is replaced with a graft taken from the patient’s own tissue (autograft) or a donor (allograft).
Step 1: The patient is placed under general or spinal anaesthesia.
Step 2: Arthroscopic (keyhole) surgery is performed, with a small camera inserted into the knee to guide the procedure with minimal tissue disruption.
Step 3: The remnants of the torn ACL are removed from the joint.
Step 4: Tunnels are drilled into the femur and tibia at precise angles to anchor the new graft in the correct position.
Step 5: The graft is passed through the tunnels and secured with fixation devices.
Step 6: The knee is assessed for stability and range of motion before the incisions are closed.
The two most commonly used graft options are:
- Hamstring tendon graft: Associated with less donor site discomfort and a good cosmetic outcome, though it has a slightly higher re-tear risk in young athletes.
- Patellar tendon graft: Considered the gold standard for high-demand athletes due to its strength and faster graft integration, though it may cause some discomfort at the donor site.
Your surgeon at SGVP Holistic Hospital will discuss both options and recommend the most suitable choice based on your age, sport, and lifestyle.
Recovery After ACL Surgery: Timeline
Week-by-Week Recovery
Days 1–7: Walking with crutches begins on the day of surgery or the day after. The knee is kept elevated and iced to manage swelling. Physiotherapy starts immediately with gentle range-of-motion exercises.
Weeks 2–6: Full weight-bearing is typically achieved within 1 to 2 weeks. Crutches are gradually discontinued. Physiotherapy focuses on restoring the range of motion and beginning early strengthening.
Months 2–3: Swelling reduces significantly. Progression of strengthening the quadriceps, hamstrings, and hip muscles. Cycling and swimming may be introduced as low-impact conditioning.
Months 4–6: Light jogging and sport-specific movement drills begin. Neuromuscular control and balance training are emphasised during this phase.
Months 6–9: Gradual return to non-contact sports training. The graft continues to mature and integrate during this period, making it important not to rush return to play.
Months 9–12: Return to full competitive sport is assessed based on functional testing, strength symmetry, and psychological readiness. Most patients achieve full return to activity within 9 to 12 months.
Physiotherapy Protocol
Physiotherapy is crucial for ACL recovery and begins within 24 hours of surgery at SGVP Holistic Hospital. The program is structured in phases, progressing from swelling control and early mobility to strength, agility, and sport-specific training.
A home exercise program is provided alongside supervised sessions, and return-to-sport decisions are made based on objective functional criteria rather than time alone
Risks of ACL Surgery
ACL reconstruction is a well-established procedure with a high success rate, but patients should be aware of potential risks.
- Infection at the surgical site.
- Blood clot formation in the leg or lung.
- Graft failure or re-tear, particularly with premature return to sport.
- Knee stiffness or limited range of motion post-surgery.
- Donor site discomfort, depending on the graft type used.
- Nerve or blood vessel injury in the surrounding area.
- Development of long-term knee arthritis.
These risks are minimised with experienced surgical technique, appropriate graft selection, and a structured rehabilitation program. At SGVP Holistic Hospital, strict protocols for surgical safety and postoperative monitoring are followed throughout the recovery process.
Book a consultation with our orthopaedic specialists at SGVP Holistic Hospital today for an accurate diagnosis and a personalised ACL treatment plan in Ahmedabad.
Frequently Asked Questions (FAQs)
Classic signs include hearing or feeling a pop in the knee during injury, immediate swelling within hours, severe pain, inability to continue activity, and knee instability or giving way. SGVP’s orthopaedic specialists use physical examination, including the Lachman test, and MRI to accurately confirm ACL tears.
Partial ACL tears may heal with physiotherapy, bracing, and activity modification in sedentary individuals. However, complete tears in active people typically require surgery to restore stability. SGVP’s sports medicine team evaluates whether conservative treatment is appropriate for your specific case before recommending a course of action.
Initial recovery takes 6 to 8 weeks for daily activities. Return to light sports occurs at 4 to 6 months. Full return to competitive sports requires 9 to 12 months to ensure adequate graft strength and neuromuscular control. SGVP’s structured rehabilitation program is designed to optimise safe return to activity at each stage.
ACL reconstruction surgery costs ₹80,000 to ₹2,00,000 in Ahmedabad, depending on graft type, hospital, and surgeon expertise. SGVP offers transparent pricing with comprehensive packages that include surgery, hospital stay, physiotherapy sessions, and follow-up consultations.
Both have excellent success rates. Patellar tendon grafts are stronger and integrate faster, but may cause kneeling discomfort. Hamstring grafts have fewer donor site issues but a slightly higher re-tear risk in young athletes. SGVP’s surgeons discuss the pros and cons of each option based on your age, activity level, and personal preferences.
Yes, most patients walk with crutches the same day or the day after surgery. Full weight-bearing is typically allowed within 1 to 2 weeks. However, returning to running and sports takes several months. SGVP’s physiotherapists guide progressive weight-bearing safely throughout the recovery process.
