What Causes Tennis Elbow?
Tennis elbow — lateral epicondylalgia or lateral epicondylitis in medical terms — is pain on the outside of your elbow caused by tendinopathy (chronic overload and degeneration) of the extensor tendons that attach to the lateral epicondyle.
These are the tendons that extend your wrist and fingers. When you grip something, make a fist, or lift with your palm down, these tendons are working. Overload them — through high volume, high intensity, or sudden increases in load — and they develop tendinopathy.
Common causes include heavy pulling exercises in the gym (rows, deadlifts, pull-ups), high-volume racket sports (tennis, squash, badminton), manual work involving repetitive gripping and lifting, desk work with poor ergonomics, or DIY projects involving prolonged gripping of tools.
What most people don’t realise: tennis elbow is almost never an acute injury. It’s a gradual overload injury that develops over weeks or months when your tendon’s capacity can’t keep up with the demands you’re placing on it. By the time you notice pain, the tendon has already been struggling for a while.
I see tennis elbow constantly among gym-goers across Liverpool, Chester, and Merseyside who’ve ramped up pulling volume too quickly, desk workers with terrible mouse and keyboard setups, and people who’ve done a weekend of heavy manual work after months of no physical activity.
How Tennis Elbow Develops
Tennis elbow isn’t one condition — it’s a spectrum from acute reactive tendinopathy (early overload response) to chronic degenerative tendinopathy (longstanding structural changes). Understanding where you are on that spectrum guides treatment.
Reactive Tendinopathy (Early Stage)
The tendon is irritated and swollen from sudden overload, but there’s no structural damage yet. This is the early warning sign that you’ve exceeded your tendon’s current capacity.
Pain on the outside of the elbow, worse with gripping, lifting, or wrist extension. You might notice it during specific exercises (pull-ups, rows, deadlifts) or activities (opening jars, lifting a kettle, using tools).
This stage responds well to load management and progressive loading. If you catch it early and modify activity appropriately, you can settle symptoms quickly and build capacity without progressing to chronic tendinopathy.
Common among gym-goers across Chester and Merseyside who’ve increased training volume or intensity too quickly — adding sets, increasing weight, or ramping up pulling exercises without adequate progression.
Tendon Dysrepair (Mid-Stage)
The tendon has been chronically overloaded and is now undergoing structural changes — disorganised collagen, some degeneration, failed healing attempts.
Pain is more persistent. It’s not just during the aggravating activity — you might get pain at rest, at night, or with low-level activities like typing or holding a cup of tea.
This is where most people seek treatment. They’ve had symptoms for weeks or months, tried rest (it didn’t work), tried anti-inflammatories (temporary relief at best), and now they want answers.
Recovery takes longer at this stage because the tendon needs time to remodel and restore normal structure. But progressive loading still works — it just requires more patience and careful load management.
Degenerative Tendinopathy (Chronic Stage)
Longstanding tennis elbow with significant structural changes in the tendon. This is the person who’s had elbow pain for years, tried everything, and nothing has worked.
Pain is entrenched. The tendon is sensitive to almost any load. Sometimes there’s secondary muscle weakness, loss of grip strength, and significant functional limitation.
This stage needs comprehensive management — progressive loading combined with adjuncts like shockwave therapy to stimulate tendon remodelling. Recovery is measured in months, not weeks.
Common among people who’ve had symptoms for over a year without proper treatment, or who’ve repeatedly tried to train through pain without addressing the underlying tendon dysfunction.
What You Can Expect in Your Assessment
I’ll take a detailed history of how the pain started, what aggravates it, what you’ve tried already, and what your goals are — whether that’s getting back to heavy gym training, returning to racket sports, or just being able to work without constant elbow pain.
Then I’ll assess your elbow — palpation to identify the exact tender structures, specific clinical tests to reproduce your pain and confirm the diagnosis, grip strength testing, and assessment of your shoulder and wrist to identify any contributing factors.
Often I’ll watch you perform the movements that aggravate your symptoms — gripping, wrist extension, lifting — to understand loading patterns and where compensations might be happening.
By the end of the session, you’ll have:
A clear diagnosis
Confirmation of tennis elbow and identification of what's driving it
Realistic timescales
How long recovery typically takes based on symptom duration and severity
A rehab plan
Progressive loading programme, plus modifications to training or work
Next steps
Whether you need imaging, shockwave therapy, or just a structured home programme
Do I Need a Scan?
Usually not. Tennis elbow is a clinical diagnosis based on history and examination.
Ultrasound can show tendon changes — thickening, disorganised structure, sometimes calcification — but the scan findings don’t always correlate with symptoms. You can have significant tendon changes on ultrasound with minimal pain, or severe pain with relatively minor structural changes.
Clinical assessment is enough to diagnose tennis elbow and guide treatment. We can start progressive loading straight away without waiting for imaging.
You might need imaging if:
- Symptoms aren’t improving as expected after 8-12 weeks of good conservative management
- There’s diagnostic uncertainty — other conditions need ruling out
- We’re considering shockwave therapy or injections and want to confirm tendon pathology
- There’s concern about other structures — possible ligament injury, joint pathology, or nerve involvement
Ultrasound is the best imaging modality for tennis elbow — it’s dynamic, shows tendon structure clearly, and is cheaper than MRI.
If imaging is needed, I’ll guide you on the best route — NHS referral via your GP, or private ultrasound if you want results quickly.
Why Rest Alone Doesn’t Work
People rest their elbow, avoid aggravating activities, stop training, and wait for pain to settle. Symptoms might improve slightly. Then they go back to lifting or gripping and pain returns immediately, sometimes worse than before.
Here’s why: rest reduces pain by removing the aggravating load, but it doesn’t fix the underlying problem — your tendon has lost capacity and can’t tolerate the loads you’re asking it to handle.
Tendons adapt to load. When you rest completely, the tendon deconditions further. When you return to the same loads you were doing before, you’re asking a weaker, less resilient tendon to handle forces it couldn’t manage when it was stronger.
Modifying aggravating activities initially is sensible — you can’t keep overloading an irritated tendon and expect it to heal. But complete rest leads to deconditioning and poor outcomes. The goal is to find loads the tendon can tolerate, then progressively build capacity through structured strengthening. That’s what restores function and prevents recurrence.
What Does Tennis Elbow Rehab Involve?
Depends on the specific stage and severity, but here’s what most tennis elbow rehab programmes include:
Load management: Identifying what activities are overloading the tendon and modifying them temporarily. For gym-goers, this might mean reducing pulling volume or changing grip positions. For desk workers, ergonomic adjustments to reduce wrist extension strain.
Progressive loading programme: This is the cornerstone of tendon rehab. Starting with isometric exercises (static holds), progressing to isotonic strengthening (concentric and eccentric), then heavy slow resistance training. The load is carefully progressed based on symptom response.
Eccentric strengthening: Specific eccentric wrist extension exercises have good evidence for tennis elbow. These involve loading the tendon while it lengthens, which promotes tendon remodelling and strength gains.
Grip strength training: Tennis elbow causes grip weakness. Rebuilding grip strength through progressive resistance exercises is essential for return to normal function.
Shoulder and scapular strengthening: Often overlooked but important. Poor shoulder control increases demand on the forearm muscles and contributes to elbow overload. Strengthening the posterior shoulder and scapular stabilisers reduces load on the elbow tendons.
Activity modification and return to sport/work: Progressive reintroduction of aggravating activities once you’ve built adequate tendon capacity. This is structured — you don’t just go back to what you were doing before and hope for the best.
Shockwave therapy (if indicated): For chronic degenerative tendinopathy, shockwave therapy can stimulate tendon remodelling and accelerate recovery. This is an adjunct to loading, not a replacement for it.
How Long Does Recovery Take?
Realistic timescales for tennis elbow:
Reactive tendinopathy (caught early, symptoms less than 6 weeks): 4-8 weeks. With good load management and progressive strengthening, most people see significant improvement relatively quickly.
Tendon dysrepair (symptoms 6 weeks to 6 months): 8-12 weeks. The tendon needs time to remodel. Progress is steady but requires patience and consistent adherence to the loading programme.
Chronic degenerative tendinopathy (symptoms over 6 months): 3-6 months, sometimes longer. The tendon has significant structural changes that take time to reverse. Shockwave therapy often helps at this stage.
Return to full training/work: Variable. Some people return to full activity within 8-12 weeks. Others need 4-6 months before they can tolerate pre-injury loads. It depends on severity, chronicity, and the demands of your sport or work.
These are broad ranges. Your specific timeline depends on how long you’ve had symptoms before seeking treatment, how severely you’ve overloaded the tendon, and how well you stick to the progressive loading programme.
The single biggest factor in recovery time: consistency with rehab. People who follow the loading programme consistently get better. People who skip exercises, keep aggravating the tendon with high loads, or bounce between rest and overload rarely improve.
When to Book an Assessment
- You’ve had elbow pain on the outside of your elbow for more than a week
- Pain is affecting your ability to train, work, or do daily activities
- You’ve tried rest but symptoms return as soon as you go back to normal activity
- You want a clear diagnosis and structured rehab plan rather than guessing
- You’ve had tennis elbow before and want to sort it properly this time to prevent recurrence
- You’re considering steroid injections and want to understand conservative options first
- It’s been less than 48 hours since symptoms started and you haven’t tried basic load management yet
- Pain is severe with significant swelling and you’re concerned about acute injury (possible muscle tear or ligament damage) — see your GP first
- You’ve got red flag symptoms like severe pain that’s progressively worsening, fever, or unexplained systemic symptoms — medical assessment needed
Location and Booking
I run a clinic in Chester, with appointments available Monday, Wednesday, Thursday, and Friday.
Whether you’re a gym-goer across Cheshire struggling with pulling exercises, a desk worker from Chester dealing with mouse and keyboard pain, or someone from Cheshire who’s had chronic elbow pain for months, I can help.
Book online to see available slots, or get in touch if you’ve got questions before booking.
No hard sell. No obligation. Just honest physio focused on getting your tendon properly rehabbed so you can get back to training or work without ongoing pain.