Contents 1. What Is the Meniscus? 2. How Injuries Happen 3. Injury Grades 4. When Is Exercise Safe? 5. When to See a Doctor 6. How Exercise Helps 7. Our Exercises Explained 8. Exercise Precautions

1. What Is the Meniscus?

Your knee has two C-shaped pieces of cartilage called menisci (singular: meniscus). They sit between your thighbone (femur) and shinbone (tibia).

Think of them as shock absorbers. They cushion impact, spread your body weight evenly across the joint, and help keep your knee stable when you move.

An important detail: the outer edge of the meniscus has blood supply and can heal on its own. The inner part has almost no blood flow, which makes healing much harder there.

2. How Injuries Happen

Meniscus injuries usually happen in two ways:

Sudden twist or pivot — common during sports when your foot is planted but your knee rotates. This can also happen from deep squats or standing up awkwardly.
Gradual wear — as we age, the meniscus becomes weaker and more brittle. Everyday activities can cause small tears over time, especially after age 40.

Common symptoms include knee pain (especially when twisting), swelling, stiffness, a feeling of the knee "catching" or "locking", and difficulty fully straightening the leg.

3. Injury Grades

Meniscus injuries are classified into three grades based on MRI findings:

Grade 1 (Minor) — Small area of damage inside the meniscus that doesn't reach the surface. You might feel mild stiffness but often no significant pain. No surgery needed.
Grade 2 (Moderate) — More extensive damage, but still not a full tear through the surface. May cause intermittent pain and some swelling. Usually managed with rest and rehabilitation exercises.
Grade 3 (Severe) — A true tear that extends to the surface. Can cause significant pain, swelling, knee locking, or the knee giving way. May require surgery depending on the tear pattern and location.

This app is designed for Grade 1-2 injuries where conservative rehabilitation through exercise is the recommended approach. If you have a Grade 3 tear, consult your doctor before using this app.

4. When Is Exercise Safe?

Rehabilitation exercise is generally safe when:

Your injury is at least 2 weeks old and acute swelling has gone down
You can bear weight on the leg without severe pain
Your knee's range of motion is returning
A doctor or physiotherapist has confirmed it's appropriate for you
You have a Grade 1 or 2 injury, or are recovering from surgery with medical clearance

5. When to See a Doctor

Stop exercising and seek medical help if you experience:

Your knee locks and cannot fully straighten or bend
Significant swelling that appears within hours of exercise
Your knee gives way or feels unstable
You cannot bear weight on the affected leg
Pain that gets worse over days instead of improving
A popping sensation followed by sudden swelling
Pain above 4 out of 10 that doesn't ease after rest

6. How Exercise Helps

The key principle is simple: stronger muscles around the knee take pressure off the meniscus.

Your quadriceps (front of thigh) are the most important muscle group for knee protection. When they're strong, they absorb more of the impact that would otherwise go through the meniscus. Research consistently shows that quadriceps strengthening is the single most important factor in knee joint protection.

The hamstrings (back of thigh) and calf muscles also contribute to knee stability. A balanced strengthening program helps the entire joint work better.

Consistency beats intensity. Doing a short session every day is far more effective than one long session per week. Even 5 minutes daily can make a meaningful difference over weeks.

7. Our Exercises Explained

Straight Leg Raise

Lie on your back. Bend the uninjured knee with foot flat on the floor. Keep the injured leg straight. Tighten the quadriceps, then lift the leg to about 30-45 degrees. Hold for a few seconds, then lower slowly.

Why it works: Strengthens your quadriceps without bending the knee, putting minimal stress on the meniscus. This is one of the safest exercises even in early rehab stages.

Wall Squat

Stand with your back flat against a wall. Place feet shoulder-width apart, about half a meter from the wall. Slowly slide down until your knees are bent at about 45-60 degrees. Hold the position, then slide back up.

Why it works: Strengthens quadriceps, glutes, and hamstrings all at once. The wall provides support and limits the range of motion to a safe zone.

Important: Never bend your knees past 90 degrees during wall squats. Deep squats put excessive pressure on the meniscus and can worsen the injury.

8. Exercise Precautions

Pain Rules

Mild discomfort (1-3 out of 10) during exercise is normal and acceptable
Pain above 4 out of 10 means stop or reduce intensity immediately
Pain lasting more than 2 hours after exercise means the session was too intense — do less next time

Progression Rules

Increase duration before intensity — hold longer before adding reps
Add reps before resistance
Increase no more than 10% per week
Rest days are part of the program, not a sign of laziness

Things to Avoid

Deep squats beyond 90 degrees
High-impact activities (running, jumping) in early rehab
Twisting or pivoting movements
Exercising through sharp or catching pain
Kneeling directly on the injured knee

Good Habits

Warm up for 5 minutes before exercising (gentle walking is enough)
Apply ice for 10-15 minutes if you notice mild swelling after exercise
Stay consistent — daily short sessions beat occasional long ones
Track your pain level — this app helps you do that automatically

Ready to start your rehabilitation?

Go to Exercises

Disclaimer: This content is for general educational purposes only and is not medical advice. It does not replace professional diagnosis or treatment. Always consult a qualified healthcare provider before starting any exercise program, especially after an injury.

References: American Academy of Orthopaedic Surgeons (AAOS), Mayo Clinic, NHS, American Physical Therapy Association.