Tennis Elbow: Why It's Not Just a Tennis Problem (And How to Fix It)

Tennis Elbow: Why It's Not Just a Tennis Problem

Despite the name, fewer than 5% of people with tennis elbow actually play tennis. Lateral epicondylalgia — to use its clinical name — is one of the most common upper limb conditions seen in physiotherapy, affecting tradespeople, office workers, musicians, parents, and recreational athletes alike.

The pain at the outside of the elbow. The weakness when shaking hands. The difficulty lifting a cup of coffee, turning a door handle, or typing without discomfort. It's persistent, frustrating, and frequently mismanaged.

The good news is that it is very treatable — when you understand what's actually happening and apply the right approach.

What's Actually Happening in the Tendon?

Lateral epicondylalgia is a condition of the extensor carpi radialis brevis (ECRB) tendon — one of the forearm muscles that extends the wrist, attaching at the lateral epicondyle of the humerus.

For years it was called "epicondylitis" — implying inflammation. But tissue studies have consistently shown that chronic tennis elbow is not primarily inflammatory. Instead, it is a degenerative tendinopathy: the tendon cells have attempted to repair themselves in response to overload, but the resulting collagen is disorganised, weak, and hypersensitive.

This matters because it changes the treatment approach entirely. Anti-inflammatory strategies (rest, ice, cortisone) treat a mechanism that isn't the main driver. What the tendon actually needs is progressive mechanical loading to drive proper collagen remodelling.

Common Causes and Contributing Factors

Lateral epicondylalgia develops when the cumulative demand placed on the ECRB tendon exceeds its capacity to adapt. This can occur through:

• Repetitive gripping and wrist extension — painting, plastering, carpentry, keyboard use
• Sustained forearm load — carrying heavy bags, prolonged mouse use
• Sudden increases in load — starting a new job, returning to sport after a break
• Poor technique in racquet sports — particularly backhand mechanics and grip size
• Cervical spine involvement — upper limb tendinopathies can be driven or maintained by referred nerve sensitivity from the neck

The last point is important and frequently missed. Cervical radiculopathy or neural sensitivity from the neck can contribute to lateral elbow pain — and if this isn't addressed, the elbow won't fully recover regardless of local treatment.

Why Rest Makes It Worse Long-Term

This is one of the most important concepts in tendinopathy management.

Tendons respond to load. When you remove load completely, the tendon becomes more sensitised — not less. The cells downregulate their activity, the matrix weakens, and when you return to normal activity, the tendon is less capable of tolerating load than before.

This is why people who rest their elbow for weeks or months often find that symptoms return immediately when they try to resume normal activity. The pain settled because they avoided the provocative load — not because the tendon adapted and got stronger.

The goal is not to avoid loading the tendon. It's to find the right dose of load, then progressively increase it.

Evidence-Based Treatment: What Actually Works

Progressive loading — the cornerstone of treatment

A structured eccentric and heavy slow resistance programme for the wrist extensors is the most effective treatment for lateral epicondylalgia. This involves slow, controlled wrist extension exercises against resistance, progressing over 8–12 weeks.

The programme starts with isometric exercises (no movement, just contraction against resistance) which are pain-inhibiting and safe in the acute phase, then progresses to isotonic and finally functional loading. Done correctly, this drives collagen remodelling and significantly increases tendon load tolerance.

Relative rest and activity modification

During the early phase of rehabilitation, reducing the specific provocative activity (while maintaining therapeutic loading) allows symptoms to settle enough to begin rebuilding. This might mean modifying grip technique, using a forearm strap, or temporarily reducing the volume of the aggravating task.

Manual therapy

Mills manipulation — a specific manual therapy technique for lateral epicondylalgia — has evidence for short-term pain reduction and improved grip strength. Cervical and thoracic spine mobilisation is also indicated when neural sensitivity is contributing.

Dry needling

Dry needling to the ECRB muscle and tendon is a useful adjunct for managing pain in the early stages, and may facilitate earlier engagement with the loading programme. It is most effective as part of a broader physiotherapy plan rather than as a standalone treatment.

Equipment and technique review

For racquet sport players, backhand technique, grip size, and string tension are all modifiable risk factors. A physiotherapist can identify technical issues contributing to tendon overload and advise accordingly.

The evidence on cortisone: proceed with caution

A landmark randomised controlled trial published in The Lancet compared cortisone injection, physiotherapy, and watchful waiting for tennis elbow. At 12 months, the injection group had significantly worse outcomes than both other groups — with the highest recurrence rate.

Cortisone may be appropriate in specific circumstances (severe pain preventing engagement with any other treatment), but should not be used as a routine or early intervention for lateral epicondylalgia.

How Long Does Recovery Take?

With consistent adherence to a loading programme:

• 4–6 weeks: Most people notice meaningful reduction in pain intensity and improved grip strength
• 8–12 weeks: Significant functional improvement, return to most activities
• 3–6 months: Full resolution and return to provocative activities

Recovery is rarely linear — there are often temporary flare-ups as load is progressed. This is normal and expected, and doesn't mean treatment isn't working.

Preventing Recurrence

Once symptoms have resolved, maintaining the strength gains made during rehabilitation is the most important prevention strategy. This means continuing with a maintenance loading programme — not necessarily daily, but 2–3 times per week — rather than stopping completely once pain settles.

Addressing any workstation or technique factors that contributed to the original overload also reduces the risk of recurrence significantly.