Knee pain in volleyball: jumper's knee

Jumper's knee is a tendinopathy of the patellar tendon: the tendon connecting the kneecap to the shin bone gets irritated because it takes on more load than it can handle. In volleyball it happens for a simple reason: you jump a lot and you land a lot, and the braking on landing puts far more through the tendon than the drive does. Rest alone doesn't fix it — rest takes the pain away but leaves the tendon as weak as before. What fixes it is managing your jump load and progressively strengthening quads, glutes and calves.

What jumper's knee actually is

The technical term is patellar tendinopathy. The patellar tendon runs from the lower edge of the kneecap and attaches to the shin: every time you leave the ground or land, it's the tendon transmitting the quad's force to the leg. When the load is too high or too closely spaced, the tendon's structure disorganises and becomes painful.

"Inflammation" is the word you hear most, but it's imprecise. In most chronic cases there's no classic inflammation: there's a tendon that has degraded because it never had time to adapt. That difference matters, because it changes the treatment: anti-inflammatories and ice calm the symptom, but the tendon only rebuilds with the right load.

Where you feel the pain

The spot is almost always the same: just under the kneecap, on the lower edge. Press it with a finger and you'll find it. It's a localised pain you can point to with a fingertip — not a pain spread across the whole knee. If the discomfort is instead on the outside, the inside, or deep inside the joint, it probably isn't jumper's knee and it's worth getting it looked at.

The signals not to ignore

• It hurts at the start of training, then "warms up" and disappears, and comes back harder a few hours later or the next day.
• It hurts going down stairs, not up.
• It hurts more on landing than on the drive.
• After a heavy week of jumping it gets worse; after a few easy days it gets better.

If the pain stays at rest, wakes you at night or locks your knee, it's no longer something to manage on your own: see a doctor or a sports physiotherapist.

Why it hits volleyball players in particular

Jump volume

Jumper's knee is a problem of accumulated load, not of one badly executed movement. A volleyball player doing gym work, technical training, matches and maybe beach volleyball at the weekend racks up hundreds of takeoffs and landings a week. The tendon adapts, but slowly: far more slowly than muscle. When you raise volume suddenly — start of preseason, double sessions, a summer tournament — the muscle copes and the tendon doesn't.

The landing matters more than the drive

On takeoff the tendon works concentrically, which is the least stressful mode. On landing it works eccentrically: it has to brake your whole bodyweight in hundredths of a second. Anyone landing stiff, with knees barely bent and feet slapping down, concentrates everything right there. Anyone landing with absorption — hip folding, knee following, foot landing forefoot first — spreads the load across more joints.

Weak links above and below

The knee sits in the middle. If the hip lacks strength (weak glutes, poor pelvic control) or the ankle lacks dorsiflexion mobility, the knee compensates and takes on a share of load that isn't its own. Many "knee problems" are really hip and ankle problems showing up at the knee.

What to do when the knee already hurts

1. Reduce, don't stop completely. A full stop makes the pain go away and makes the tendon lose even more tolerance: when you come back, it returns exactly the same. Better to cut the maximal jumps and the plyometric work, and keep the rest.
2. Add isometrics. Static quad contractions, held for a long time, are well tolerated even with pain and help maintain strength. They're the first brick when you can't jump.
3. Move to slow eccentric work. Single-leg squat on a decline board, slow and controlled on the way down. This is the work that reorganises the tendon, but it has to be progressive: if the pain is worse the next day, you did too much.
4. Strengthen above and below. Glutes, hamstrings, calves, and ankle mobility. This isn't accessory work: it's the part that prevents the relapse.
5. Fix the landing. Film yourself landing from a block or an attack. If the knee falls inward or the legs stay straight, you've found part of the problem.
6. Ice and a strap are support only. They're there to get you through the match, not to cure you. They don't replace the strength work.

How to prevent it across the whole season

Preventing jumper's knee isn't a set of exercises you do for two weeks in September. It's a constant that runs through the season, and it rests on three things.

Base strength, all year. A strong tendon is a tendon that has seen progressive loads consistently. Squats, lunges, deadlifts, single-leg work. In season too, at reduced volume.

Jump progression. Increase plyometric volume in small steps, not in jumps. If you did 100 quality jumps this week, you don't do 200 next week.

Mobility and deloads. Mobile ankle, mobile hip, and at least one planned deload phase every training cycle. The tendon adapts on the days you don't load it.

Measure first, train, then measure again

There's a practical reason to have a starting number: without one, you don't know whether the knee is limiting you or you're simply going on feel. If you know your vertical jump in centimeters, you can notice it dropping before the pain arrives — a jump that falls while your training stays the same is often the first sign of overload.

On the site there's a free jump test: you upload a two-second video of yourself jumping, the system calculates the height from flight time and gives you the figure in centimeters. The video never leaves your device. Redo it every four to six weeks and you'll have the real curve of your jump, not an impression.

The JHP programs that work on the knees

Knee Power — €40. The program built around knee strengthening and managing jumper's knee: isometrics, progressive eccentric work, glute and calf strengthening, ankle mobility. It's where to start if the discomfort is already there.

Jump Higher Program — 10 weeks of bodyweight jump training, €60. Builds base strength and takeoff and landing technique with no equipment needed.

JHP Gym Edition — 16 weeks in the weight room on maximal strength and power, €60. This is the work that makes a tendon tolerant over the long run.

The Stretching Bible — over 50 exercises, €20. Useful for hip and ankle mobility, the two points that take load off the knee.

If you want it all together, the JHP subscription costs €99 a year and includes 13 programs, WhatsApp support for questions about execution, and free cancellation. You can also browse all the individual courses and buy only what you need.

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