Patellar Tendinopathy (Jumper's Knee): 12-Week Rehab Program

A complete 12-week progressive-loading program for jumper's knee — isometrics, heavy slow resistance, plyometrics and return to sport, with dosing, pain rules and progression criteria.

📎 Want the principles — tendon rehab stages and pain monitoring in general? See → Tendinopathy Rehab — Exercise Progression & Program (overview)

What is it?

Patellar tendinopathy (“jumper’s knee”) is pain in the tendon that connects your kneecap to your shin bone, caused by repeated jumping, stopping and cutting loading the tendon beyond what it can handle. It is common in basketball, volleyball and track athletes.

• The classic sign is tenderness at the lower edge of the kneecap, worse during or after activity, and sometimes after prolonged sitting.
• Like other tendinopathies, the core problem is not simple inflammation — rest and anti-inflammatories alone usually won’t fix it.
• The strongest evidence supports progressive tendon-loading exercise (PTLE), which outperforms eccentric-only protocols; heavy slow resistance (HSR, ~90% 1RM) and moderate slow resistance (MSR, ~55% 1RM) are equally effective.

An honest note: the 12-week plan below turns the best available evidence into something you can follow. But the exact sets, tempo, how many weeks each phase lasts, and objective progression thresholds are mostly not validated by high-quality trials — most studies use pain-guided progression. Treat the weeks as a guide and adjust to your own symptoms and strength.

The full 12-week program

Progression is driven by strength and symptoms — not the calendar. Only move up once a phase feels solid.

Pain monitoring: how much is OK?

Some pain during rehab is allowed. Use a 0–10 scale:

• Isometric and plyometric phases: pain ≤3–4/10 during exercise is acceptable.
• Slow-resistance phase: pain ≤5/10 during is acceptable, and should not exceed 5/10 the next morning.
• Two safety checks: pain returns to baseline within 24 hours (by the next morning), and it does not get worse week over week.
• Practical rule: if pain after/next day is <3/10 → add ~5 kg next session; 3–5/10 → hold; >5/10 → drop 5 kg or reduce reps.
• Do the same test movement each morning (e.g. single-leg decline squat) and log the score to see the trend.

Common mistakes

• Resting completely and waiting it out — the tendon only gets weaker and re-flares when you jump again.
• Skipping phases 3–4 and returning to sport — jumping athletes who skip energy-storage/plyometric work relapse easily.
• Progressing by the calendar — “it’s been 8 weeks so I should jump” is wrong; go by strength and symptoms.
• Passive treatment only — massage or electrotherapy may feel nice but give no lasting effect without loading.
• Training only the knee — hips, core and calves all matter.

When to seek medical care (red flags)

See a clinician — don’t push through — if you have:

• A “pop” during activity followed by sudden weakness (possible tendon rupture).
• Inability to bear weight or straighten the knee normally.
• Marked swelling, redness or warmth, or fever.
• Pain at rest or at night unrelated to activity.
• No progress after 2–3 months of genuine loading.

FAQ

Q: Do I have to stop sport completely?

• Usually not. In most cases you can modify load rather than reset to zero: cut jumping/cutting volume, keep pain-free training, and run the program alongside.

Q: Do I have to use a decline board?

• A ~25° decline increases load on the patellar tendon and is commonly used, but the key is slow, progressive loading. Leg press and Spanish squats also work — pick what you’ll stick with.

Q: How long until it’s better?

• Expect clear progress by about 12 weeks, but full return to high-intensity sport often takes 3–6 months or more. Progress isn’t linear — watch the overall trend. VISA-P is a useful questionnaire to track yourself.

Q: Which is best — eccentrics, isometrics, or HSR?

• Network meta-analysis shows little difference between them for symptom improvement. The most important thing is to choose one you can do consistently — consistency beats the specific format.