What Is Tennis Elbow? Causes, Symptoms and How to Prevent It

Here is the joke that every physiotherapist has heard a hundred times: most people with tennis elbow have never picked up a racket. Painters, plumbers, gardeners, keyboard warriors and new parents lifting car seats all turn up with the same sore outer elbow. Tennis simply lent the condition its name, because the repetitive gripping and twisting of a racket is such a tidy way to bring it on.

For those of us who do play, though, tennis elbow is worth understanding properly. It is one of the most common reasons club players end up watching from the sidelines, and the good news is that a few sensible habits, plus the right kit, make it far less likely.

So, what is tennis elbow?

Tennis elbow, known in clinics as lateral epicondylitis, is what happens when the tendons on the outside of your elbow become irritated and inflamed. Tendons are the tough cords that anchor muscle to bone, and the ones affected here run from your forearm muscles to the bony bump on the outer side of your elbow. Ask them to grip, twist and brake a racket thousands of times, especially without a rest, and the tissue can start to break down faster than it repairs.

It is most common in people aged between 35 and 54, though it can arrive at any age. It is not usually serious, but it can be stubborn and annoying, turning simple things like lifting a kettle or shaking hands into a wince.

What causes tennis elbow?

The root cause is overload: repetitive gripping combined with wrist and forearm twisting, repeated more often than the tendon can cope with. On court, a few specific things tend to tip players over the edge.

Technique is the big one. A backhand hit with a weak, bent wrist, or a habit of muscling the ball with the forearm rather than turning the body, sends the strain straight into those elbow tendons. Suddenly playing far more than usual, a new weekly doubles slot on top of your normal singles, for instance, is another classic trigger, because the tendon never gets time to recover.

Equipment plays a quiet but real role too. A racket that is too heavy, or badly balanced for your swing, forces your arm to work harder on every shot, so it is worth knowing how to choose a racket that actually suits you. Grip size matters as well: a handle that is too small makes you squeeze harder to keep the racket steady, and that constant clench is exactly what irritates the tendon, which is why getting your grip size right is one of the simplest fixes going.

Then there are the strings. Stiff strings strung at high string tension transmit far more shock into your arm on every hit, while a softer setup cushions the blow. It is a trade-off between control and comfort that we have written about before, and for anyone with a twinge in their elbow, comfort should win.

What are the symptoms of tennis elbow?

The tell-tale sign is pain and tenderness on the outer side of the elbow, sometimes spreading down into the forearm. You may notice it flaring up when you grip something, twist your wrist, lift a bag or straighten your arm fully. In tennis terms, that first flush of soreness after a heavy hitting session, the one that lingers into the next morning, is your early warning.

Some people also feel a little swelling or a weak, unreliable grip, so that a full kettle suddenly feels heavier than it should. That is your elbow trying to tell you something.

How long does tennis elbow last?

This is the question everyone wants answered, and the honest reply is: it varies. For many people tennis elbow settles down with rest over a few weeks. For others it can grumble on for months, and in a minority of cases it lingers for a year or more before it fully clears.

The single biggest factor is whether you keep aggravating it. Play through the pain and you keep reopening the same wound, which is why the condition has such a reputation for dragging on. Give the tendon a genuine break from the movements that hurt and you give it the chance to do what it does naturally, which is repair itself.

How to prevent tennis elbow

Prevention is far easier than cure, and none of it is complicated. A few habits go a long way.

Warm up before you play. Five minutes of easy arm swings, gentle wrist circles and some slow rallies gets blood into the forearm and prepares the tendons for load. Build up gradually, too: if you have not played all winter, do not open the season with three hard sets. Let your body adapt over a few weeks.

Look after your technique. Clean, body-driven strokes spread the workload across your legs, core and shoulder instead of dumping it all on your forearm, and it is worth spending time on clean, relaxed technique rather than trying to overpower every ball. A lesson or two with a coach to check your backhand is money well spent if your elbow is a recurring problem.

Finally, get your kit working with you rather than against you. A lighter, more forgiving frame, the correct grip size and a comfortable string setup can dramatically cut the shock reaching your arm. If your current racket feels like a lump of lead by the third set, it may be time to browse lighter, more forgiving frames. Small strength exercises for the forearm, done a couple of times a week, also build resilience so the tendon can take more before it protests.

What to do if you already have it

If the soreness has already arrived, resist the urge to play through it. Rest from the movements that hurt, use a cold pack for up to twenty minutes at a time to calm a flare-up, and consider gentle over-the-counter pain relief if you need it. Simple, progressive forearm exercises are one of the most effective long-term treatments, so it is well worth looking those up or asking a physio.

Many players also find that a forearm support strap or compression sleeve helps once they return to court, by taking some of the tension off the sore tendon during play. It is a support, not a cure, but it can make the difference between resting the arm sensibly and resting it completely.

Above all, be patient. Tennis elbow rewards the players who respect it and punishes the ones who ignore it. If the pain has not eased after a couple of weeks of self-care, or it is severe, see your GP or a physiotherapist, who can check it properly. Sort it out sensibly now and you will be back playing your best tennis before you know it.

This article is general information for tennis players, not medical advice. If you are worried about persistent or severe elbow pain, please speak to a qualified healthcare professional.