About ACL tear
The anterior cruciate ligament (ACL) sits deep inside the knee and keeps the shin bone from sliding forward and twisting under the thigh bone. It is most often torn during a sudden stop, a quick change of direction, or an awkward landing, and many people remember hearing or feeling a pop.
A torn ACL usually does not heal back together on its own. Some knees stay stable enough for daily life and straight-line activity, while others keep giving way, especially in sports that involve cutting and pivoting. Repeated giving way can damage the meniscus and the joint surface over time.
The right plan depends on your age, your sport or work, how stable the knee feels, and whether other structures were injured. Our physicians walk through these trade-offs with you so the decision fits your goals.
Common symptoms
- A pop at the moment of injury followed by swelling within hours
- A feeling that the knee shifts, buckles, or gives way with turning
- Difficulty trusting the leg when changing direction
- Pain and stiffness that limit full bending or straightening in the first weeks
- Tenderness along the joint line if the meniscus was also injured
Common causes and risk factors
- Planting the foot and twisting or cutting quickly
- Landing from a jump with the knee collapsing inward
- A direct blow to the knee, as in football or skiing falls
- Sports such as soccer, basketball, lacrosse, and skiing
How we diagnose it
Our physicians start with a hands-on stability exam that compares the injured knee with the healthy one. Diagnostic ultrasound at the exam table helps look at swelling, the collateral ligaments, and other structures around the knee during the same visit. Because the ACL sits deep inside the joint, we refer for an MRI to confirm the tear and check the meniscus, cartilage, and bone, and X-rays are ordered when a fracture is a concern.
How Propel treats ACL tear
Early care focuses on calming swelling, regaining full knee straightening, and waking up the quadriceps. This prehab phase makes recovery smoother whether or not you have surgery. For people who choose a nonsurgical path, a structured rehabilitation and return-to-activity program builds strength, balance, and control, sometimes with a brace for sport. We check progress with objective strength and hop testing before clearing a return to higher-demand activity.
For many athletes and active adults who want to return to cutting and pivoting sports, ACL reconstruction is the better option, and we refer to trusted orthopedic surgeons for it. We then manage the post-operative rehab and the staged return to sport. PRP does not repair a torn ACL. Ultrasound-guided injections may occasionally help with a related problem, such as irritation around the knee during rehab, but they are not a substitute for surgery when the knee is unstable.
What to expect at your visit
- 1.
We listen first
Your visit opens with a real conversation: how the problem started, what you have already tried, and the activity you want back.
- 2.
Exam and in-office ultrasound
A hands-on exam, then ultrasound at the exam table, often while you move, so your physician can see the tendon, joint, or nerve involved.
- 3.
A clear diagnosis and plan
You leave knowing what is wrong and what your options are, from strength-based rehab to procedures, and why we recommend each one.
- 4.
Treatment and follow-through
Most procedures happen here in the office. We coordinate with your physical therapist and check progress against the goals you set.
Questions about ACL tear
- Can I play sports without an ACL?
- Some people return to straight-line activities such as running or cycling after rehab alone. Sports that involve sharp cutting, pivoting, or jumping are harder on a knee without an ACL, and repeated giving way can injure the meniscus. We help you weigh your sport, your goals, and how the knee responds to rehab.
- Can PRP heal my torn ACL instead of surgery?
- No. A fully torn ACL does not grow back together with PRP or any other injection. Our role is to diagnose the injury clearly, guide rehab, and connect you with a surgeon when reconstruction is the right choice.
- Why should I do rehab before ACL surgery?
- Going into surgery with less swelling, a knee that fully straightens, and stronger thigh muscles tends to make the recovery afterward easier. Prehab also teaches the exercises you will use after the operation.
- How long does it take to get back to sports after ACL reconstruction?
- Return to cutting and pivoting sports usually takes many months, and timing is based on strength, control, and testing rather than the calendar alone. We guide each stage and share progress with your surgeon.