Tennis Elbow: What the Evidence Actually Supports

Most of the tennis elbow I see in clinic has nothing to do with tennis. It is a lifter who added a heavy day of farmer's carries, a tradesperson who has been using the same screwdriver motion for three weeks straight, a climber who upped their volume before a comp. The name is a hangover from the 1970s. The condition itself is an overload injury of the tendons on the outside of the elbow, and it responds well to the right approach, which is not always the approach people arrive already expecting.

What causes tennis elbow pain?

Tennis elbow, more accurately lateral elbow tendinopathy or lateral epicondylalgia, involves the tendons of the wrist and finger extensor muscles where they attach at the lateral epicondyle, the bony point on the outside of the elbow. Repetitive gripping and wrist extension under load, think typing, gripping a barbell, holding a tennis racquet, using hand tools, gradually outpaces the tendon's ability to adapt. What shows up on biopsy in longstanding cases is not classic inflammation. It is disorganised collagen and small blood vessel changes, a genuine structural adaptation problem rather than a simple case of swelling that needs calming down.

That distinction matters for what actually helps. Tendons that are struggling to keep up with load generally need a graded return to load, not just rest.

Who gets tennis elbow?

Despite the name, actual tennis players are a small slice of who walks in with this. Far more common locally: someone who added a heavy grip-strength block at the gym, a climber pushing crimp volume before a comp season, a tradesperson repeating the same wrist motion for weeks on end, or a desk worker whose mouse and keyboard set-up has their wrist cocked in extension for hours a day. Anything that repeatedly loads the wrist extensors past what they can currently recover from is a plausible trigger, and it is rarely one single event. Most people cannot point to the day it started. It built.

Which tennis elbow treatments have weaker evidence?

A few things get sold as the answer more often than the evidence supports. Counterforce braces, the strap worn just below the elbow, can take some short-term load off the tendon and a portion of people find them useful for getting through a work day, but they are a management aid rather than a treatment on their own and should not replace a loading programme. Ultrasound therapy and low-level laser have been studied repeatedly for this condition with inconsistent, generally underwhelming results, well short of what a structured exercise programme achieves. And a static stretching routine for the forearm, while not harmful, has considerably weaker evidence behind it than progressive strengthening does. None of these is dishonest to offer as an adjunct. Sold as the main event, they are overselling what they can do.

How do I know if it is not tennis elbow?

Lateral elbow pain sometimes has a different source altogether. Referred pain from the neck, particularly the lower cervical spine, can present very similarly to lateral epicondylalgia, and so can entrapment of the radial nerve as it passes through the forearm, which tends to bring numbness, tingling or weakness rather than pain alone. Anyone with pins and needles running down the forearm, or weakness that feels disproportionate to the pain, is worth a proper look before assuming it is a straightforward tendon overload problem, since the treatment for those is different.

Does cortisone help tennis elbow?

A lot of people come in having already had, or been offered, a cortisone injection. It is worth being straightforward about what the evidence actually shows, because the short-term picture and the longer-term picture do not agree.

A well-known randomised trial published in the BMJ compared corticosteroid injection, a physiotherapy programme of manual therapy and exercise, and a wait-and-see approach for tennis elbow. At six weeks, the injection group felt considerably better than the other two groups; cortisone is genuinely effective at settling pain quickly. By one year, that advantage had reversed. The injection group had a markedly higher recurrence rate and worse outcomes overall than both the physiotherapy group and the group who were simply told to wait and see (Bisset et al., 2006, BMJ).

That does not mean cortisone is the wrong choice for everyone. There are situations, a flare that needs to settle before someone can start loading properly, for instance, where short-term relief has real value. But it is not a fix, and treating it as one is a common reason tennis elbow becomes a recurring problem rather than a one-off.

Which exercises help tennis elbow?

The clearer, more consistent evidence sits with loading exercise. A 2021 systematic review and meta-analysis in the Journal of Clinical Medicine looked specifically at eccentric strengthening, the slow, controlled lengthening phase of an exercise such as lowering a dumbbell after extending the wrist, for lateral elbow tendinopathy. It found eccentric exercise produced meaningful improvements in pain and grip strength compared with no exercise or other passive treatments, and that the effect held up better over time than passive approaches alone (Karanasios et al., 2021).

The more current thinking, reflected in the staged-management approach used across current physiotherapy guidance, is less about eccentric-only protocols and more about progressive, tolerable loading overall: starting with isometric holds if the tendon is too irritable for movement-based exercise, then building through isotonic strengthening of the wrist extensors and grip, and eventually into the kind of heavier, faster loading that matches whatever activity someone is trying to get back to, whether that is a barbell, a crimp hold or a hedge trimmer (Coombes, Bisset & Vicenzino, 2015). The exact protocol matters less than the principle: find a load the tendon tolerates today, and build from there in a way that does not spike pain the next morning.

What happens in a tennis elbow treatment session?

Assessment first. Lateral elbow pain has a few other possible sources, referred pain from the neck, radial nerve involvement, or a posterolateral rotatory instability in less common cases, and it is worth ruling those out rather than assuming every case is textbook. Once the pattern is clear, the actual work is a mix of manual therapy to the elbow, forearm and often the neck and shoulder if they are contributing to how the arm is loaded, alongside a specific, progressive strengthening programme for the wrist and forearm.

Dry needling is something I use here where there are tight, irritable muscle bands in the forearm extensors contributing to the picture, consistent with what the broader dry needling evidence supports for this kind of overload presentation. It is an adjunct to the loading programme, not a substitute for it.

Just as important as anything hands-on is the load conversation. What is the person actually doing with their arm day to day, and where is the load spiking. A lot of tennis elbow resolves faster once the trigger, a new grip on a bike, a heavier kettlebell, an extra shift of manual work, is identified and temporarily modified rather than avoided altogether.

How long does tennis elbow take to improve?

Tendon tissue adapts slowly. Meaningful, lasting improvement in lateral elbow tendinopathy is generally measured in weeks to a few months of consistent loading, not days. Pain often settles faster than grip strength and load tolerance actually recover, which is exactly the gap that leads people to feel better, stop the exercises, and have it flare again. Anyone promising a fast, permanent fix with a single technique is promising more than a tendon can physiologically deliver in that time frame.

This condition sits squarely alongside the rest of what comes up in training and sports injuries more broadly, the gym-floor, climbing-wall and trade-work overload injuries that make up a good part of the caseload here. If a nagging elbow has been getting worse rather than better with rest alone, that is usually the signal it needs a loading plan rather than more time off. Book an assessment and we will work out what is actually going on and build a programme around what the evidence supports, not around whichever injection or gadget is easiest to sell.