Jumper's Knee: Why It Happens, How to Treat It, and Getting Back to Sports

What Is Jumper's Knee?

Jumper's knee (patellar tendinopathy) is pain at the bottom of your kneecap where the patellar tendon attaches. It's an overuse injury common in sports involving jumping and landing—basketball, volleyball, track and field.

The tendon doesn't suddenly tear. It gradually breaks down from repeated stress, faster than it can repair itself.

Who Gets It?

High-Risk Sports

Risk Factors

Training factors:

Physical factors:

How It Feels

Classic Presentation

Severity Stages

Stage 1: Pain only after activity

Stage 2: Pain during activity, doesn't limit performance

Stage 3: Pain limits performance

Stage 4: Complete tendon rupture (rare)

Why It's Stubborn

Tendon Biology

Tendons heal slowly because:

The Cycle

Activity → Tendon stress → Breakdown exceeds repair → Pain → Rest → Feel better → Return too fast → Repeat

Breaking this cycle requires a different approach than just rest.

Treatment That Works

The Key Principle: Progressive Loading

Rest doesn't fix tendinopathy. The tendon needs load to remodel and strengthen—but the right amount.

Isometrics first:

Then eccentrics:

Then heavy slow resistance:

The Exercise Protocol

Phase 1: Isometrics (Days 1-7)

Spanish squat hold:

Wall sit:

Phase 2: Eccentrics (Weeks 2-4)

Decline squat eccentric:

Phase 3: Heavy Slow Resistance (Weeks 4-12)

Leg press:

Squat:

Leg extension:

Managing Pain During Rehab

Acceptable pain: Mild discomfort (3-4/10) during exercise is OK. Should settle within 24 hours.

Not acceptable: Severe pain, pain that lingers >24 hours, or worsening symptoms.

What About Rest?

Complete rest is rarely the answer. Instead:

Other Treatments

Evidence-Supported

Physical therapy:

Load management:

Mixed Evidence

Shockwave therapy:

PRP injections:

Poor Evidence

Cortisone injections:

Rest alone:

Returning to Sport

When Ready

How to Return

Week 1-2:

Week 3-4:

Week 5-6:

Week 7+:

Prevention

Strength Training

Load Management

Landing Mechanics

Address Risk Factors

Common Questions

"Should I use a patellar strap?"

Can help reduce pain during activity. Use as a supplement to rehab, not instead of it.

"How long until I'm better?"

Typically 3-6 months for full recovery. Stubborn cases may take longer.

"Can I play through it?"

Depends on severity. Stage 1-2 may allow modified participation. Stage 3 usually requires significant reduction.

"Will it come back?"

Possibly, especially if you don't address strength and load management long-term.

Jumper's knee is frustrating because it happens from what you love doing. But tendons respond to the right loading. Progress through the stages, don't rush back, and maintain strength training long-term. Most athletes return to full sport with proper rehab.