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Knee · Patellar Tendinopathy

Jumper's Knee

The cord just below your kneecap — your patellar tendon — has been overloaded. It's a load problem, not an inflammation, and the tendon has lost a bit of its usual spring and bounce.

Repeated explosive loading — jumping, landing, hard decelerations — outpaced what the tendon was conditioned for. The fix is graded loading that rebuilds the tendon's tolerance, not rest, and not stretching.

How it typically shows up

Pinpoint pain at the inferior pole of the kneecap / upper patellar tendon, load-related and dose-dependent (jumping, deceleration, decline squats), that warms up with activity and worsens after — with a sudden patellar-tendon rupture excluded.

How long recovery takes

Tendons are slow to turn around but they respond reliably to gradually building up the load. A typical program runs about 12 weeks: starting with gentle holds to ease the pain, then slow heavy strengthening, then springy jumping work.

Some ache during the exercises is fine as long as it settles within 24 hours; if it's worse the next morning, you did too much — ease the load next time.

The phased recovery approach

  1. Phase 1 · 1–3 weeks

    Calm

    Use isometric holds for pain relief and to start reloading the tendon without aggravating it.

    What you get back: calmer days with less tendon pain.

    • Isometric Wall Sit (mid-range hold) — 4–5 sets × 30–45s hold · Knee bent ~30-60 degrees
    • Spanish Squat Hold — 4–5 sets × 30–45s hold · Band behind the knees, sit back into it
    • Isometric Knee Extension Hold — 4–5 sets × 30–45s hold · Push against an immovable resistance
    • Straight Leg Raise — 2–3 sets × 8–12 reps · Knee locked straight

  2. Phase 2 · 3–8 weeks

    Rebuild

    Build tendon load tolerance with heavy, slow resistance and eccentric decline work.

    What you get back: a heavy squat without the tendon ache.

    • Heavy Slow Squat — 3–4 sets × 6–8 reps · Use gym load or a weighted backpack / household load
    • Leg Press — 3–4 sets × 6–8 reps · Within the comfortable range
    • Single-Leg Decline Squat (eccentric) — 3–4 sets × 6–8 reps · Use a slanted board or wedge if you have one (heels lower than toes); otherwise the edge of a step
    • Wall Sit — 3–4 sets × 6–8 reps · Back flat on the wall

  3. Phase 3 · 3–6 weeks

    Back to running

    Restore the tendon's energy-storage (jump) capacity and rebuild sport volume.

    What you get back: jumping and your sport again.

    • Single-Leg Decline Squat (eccentric) — 3–4 sets × 6–12 reps · Use a slanted board or wedge if you have one (heels lower than toes); otherwise the edge of a step
    • Heavy Slow Squat — 3–4 sets × 6–12 reps · Use gym load or a weighted backpack / household load
    • Step-Up — 3–4 sets × 6–12 reps · Drive through the front heel
    • Slow Step-Down — 3 sets × 10–15 reps · Lower yourself like an elevator

  4. Phase 4 · 3–6 weeks

    Back to the gym

    Progress heavy-slow tendon loading for lower-body training under the 24-hour tendon response rule.

    What you get back: loaded squats and training without tendon flare.

    • Leg Press — 3–4 sets × 6–10 reps · Within the comfortable range
    • Heavy Slow Squat — 3–4 sets × 6–10 reps · Use gym load or a weighted backpack / household load
    • Single-Leg Decline Squat (eccentric) — 3–4 sets × 8–12 reps · Use a slanted board or wedge if you have one (heels lower than toes); otherwise the edge of a step
    • Slow Step-Down — 3–4 sets × 8–12 reps · Lower yourself like an elevator

  5. Phase 5 · 1–3 weeks

    Back to daily life

    Lock in the heavy-slow tendon strength and chain that keep stairs, squats and long days painless.

    What you get back: stairs, squats and long days.

    • Single-Leg Decline Squat (eccentric) — 3–4 sets × 8–12 reps · Use a slanted board or wedge if you have one (heels lower than toes); otherwise the edge of a step
    • Heavy Slow Squat — 3–4 sets × 8–12 reps · Use gym load or a weighted backpack / household load
    • Wall Sit — 3–4 sets × 8–12 reps · Back flat on the wall
    • Squat to Chair — 3–4 sets × 12–15 reps · Tap the chair, stand right back up

  6. Phase 6 · 2–4 weeks

    Back to walking

    Maintain tendon load tolerance while rebuilding walking and time-on-feet under the 24-hour pain rule.

    What you get back: longer walks without tendon ache.

    • Graded Walking — 1 sets × 600–1800s hold · Build up walking time gradually
    • Single-Leg Decline Squat (eccentric) — 3–4 sets × 8–12 reps · Use a slanted board or wedge if you have one (heels lower than toes); otherwise the edge of a step
    • Heavy Slow Squat — 3–4 sets × 8–12 reps · Use gym load or a weighted backpack / household load
    • Wall Sit — 3–4 sets × 8–12 reps · Back flat on the wall

Exact exercises, sets and progression depend on your severity, equipment and goal — this is the shape of the program, not a one-size prescription.

What matters while you recover

  • Load is the medicine — and so is the 24-hour rule

    Tendons get better by being loaded, not rested. Some pain during the exercises is fine; the test is the next 24 hours — if pain is back to your baseline within a day, the load was right; if it's clearly worse, you did a touch too much, so ease off next time.

  • Skip the deep stretching

    Aggressively stretching the front of the thigh tends to compress and irritate the tendon at the kneecap. Strength and graded loading beat stretching here.

  • Slow but reliable

    Jumper's knee is frustrating because it's slow, but progressive loading works. Expect roughly twelve weeks and some ups and downs — that's normal, not a setback.

Common questions

Should I just rest it?
No — complete rest lets the tendon de-condition. It needs progressive load. You scale the load to symptoms, you don't remove it.
Is it okay for the tendon to hurt a bit during the exercises?
Yes — some tendon pain during loading is acceptable as long as it's back to your baseline within 24 hours. If it's worse the next day, you did too much.
Do I need a decline board?
It helps for the eccentric squat, but isn't essential — a wedge or the edge of a step works, and the heavy-slow squats need no special kit.

Go deeper

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