Tennis Elbow: Why "Rest It" Isn't the Full Answer | Form & Function MD
ORTHO / UPPER EXTREMITY

Tennis Elbow: Why “Rest It” Isn't the Full Answer

Form & Function MD · Dr. Ben, MD

Dr. Ben, MD · Orthopaedic Hand & Upper Extremity Surgeon

Lateral epicondylitis — tennis elbow — is one of the most common overuse conditions I treat, and one where outdated advice ("just rest it") is still the default most patients hear before they ever reach a specialist.

The name is misleading

Most patients I see for this have never played tennis. The tendon involved, the extensor carpi radialis brevis, attaches at the outside of the elbow and loads every time you grip something with the wrist extended — typing, using tools, carrying a briefcase, or, yes, a poor backhand technique. Tennis is simply the activity that happened to name the condition, not the primary cause for most people who have it.

This isn't inflammation you can wait out. It's a tendon that needs to be reloaded correctly to actually heal.

Why "-itis" is the wrong suffix

The modern understanding of this condition is that it's primarily tendinosis, not tendinitis — a degenerative process involving disorganized collagen and failed healing response at the tendon origin, rather than a primarily inflammatory one. That distinction has real clinical consequences: anti-inflammatory medication helps less than you'd expect for a condition with "-itis" in its name, because inflammation isn't the main driver past the earliest phase.

What the evidence actually supports
  • Eccentric loading exercise — controlled lengthening contractions of the wrist extensors — has the strongest evidence for rebuilding tendon capacity, not just reducing pain
  • A counterforce brace (worn just below the elbow) can reduce load on the tendon during aggravating activities
  • Corticosteroid injections provide short-term relief but have shown worse outcomes at 6–12 months compared to physical therapy in several trials — a genuinely counterintuitive finding worth knowing before requesting one

The treatment progression I actually use

Activity modification to reduce aggravating load, paired with a structured eccentric loading program — not passive rest — is the first-line approach and resolves the large majority of cases over 8–12 weeks. For the subset that doesn't respond, options include platelet-rich plasma injection, which has better evidence for tendinosis than steroids do, and for true chronic cases that fail extended conservative treatment, surgical debridement of the degenerated tissue.

When it's not tennis elbow at all
Numbness or tingling into the forearm, pain that radiates from the neck, or weakness beyond what pain alone would explain should prompt consideration of cervical radiculopathy or radial tunnel syndrome — both can mimic lateral epicondylitis and need a different treatment approach entirely.
  • Coombes BK, et al. Management of lateral epicondylalgia: a systematic review of randomized controlled trials. Br J Sports Med. 2015.
  • Bisset L, et al. Mobilisation with movement and exercise, corticosteroid injection, or wait and see for tennis elbow. BMJ. 2006.