Golfer’s elbow and tennis elbow are both elbow tendinopathies, but they affect opposite sides of the joint and involve entirely different muscle groups. Misunderstanding the distinction leads to misdirected treatment. This guide covers what makes medial epicondylitis unique, how it develops in rotational sport athletes, and what an evidence-based treatment approach looks like.
Medial vs. Lateral: Understanding the Difference
Lateral epicondylitis (tennis elbow) affects the tendons on the outside of the elbow, particularly the wrist extensors. Medial epicondylitis involves the tendons on the inside, or medial side, of the elbow, specifically the flexor-pronator muscle group. The primary structures affected are the pronator teres and flexor carpi radialis tendons where they attach at the medial epicondyle.
This distinction matters clinically. Pain from golfer’s elbow is located on the inner elbow and may radiate down the forearm toward the wrist. Activities that involve gripping, wrist flexion, and forearm pronation provoke symptoms, including the golf swing, overhead throwing, racket sports, and activities like hammering or using a screwdriver. Lateral epicondylitis pain is on the outer elbow and worsens with wrist extension and gripping.
Medial epicondylitis is less common than lateral epicondylitis overall but makes up a significant portion of elbow complaints in overhead athletes and golfers specifically.
Grip and Swing Mechanics as Contributors
In golf, the medial elbow of the trailing arm (right elbow for a right-handed golfer) is particularly vulnerable during the late downswing and impact phase, when rapid wrist flexion and forearm pronation generate high force at the flexor-pronator attachment. Poor swing mechanics, over-gripping, or an abrupt impact with hard ground can intensify this loading.
In racket sports, topspin groundstrokes and serve mechanics place similar demands on the medial elbow. Equipment factors including grip size, racket weight, and string tension play roles analogous to those in lateral epicondylitis.
A grip that is too tight chronically overloads the flexor-pronator group. Teaching athletes to reduce grip pressure to the minimum required for control is a simple but often underutilized intervention.
Targeted Rehabilitation
As with lateral epicondylitis, the histology of medial epicondylitis typically shows tendinosis, meaning degenerative changes rather than acute inflammation. The rehabilitation approach therefore centers on progressive tendon loading to stimulate collagen remodeling.
Phase 1: Load Reduction and Tissue Preparation
Identify and modify the activities most provocative for symptoms. Isometric wrist flexion exercises performed with the elbow extended are a useful starting point because they load the tendon with minimal joint stress and can serve as both a pain-relief tool and an early strengthening stimulus.
Phase 2: Eccentric and Heavy Slow Resistance Training
Progress to eccentric wrist flexion and forearm pronation exercises using light dumbbells or resistance bands. As with lateral epicondylitis, the loading should be heavy enough to produce mild, acceptable discomfort during exercise without sharp pain. Sets of 8 to 15 repetitions performed slowly (3 to 4 seconds per repetition) are standard. Increase resistance progressively as tendon tolerance improves.
Research published in the American Journal of Sports Medicine supports tendon loading programs as superior to passive approaches for both medial and lateral epicondylitis across long-term follow-up periods.
Phase 3: Sport-Specific Loading
Return-to-sport exercises should simulate the forces of the specific activity. For golfers this includes progressive grip and swing work, starting with short irons before advancing to longer clubs and full swings. For racket sport players, a graduated hitting program with attention to grip pressure and technique is essential.
Common Treatment Mistakes
Several errors commonly slow recovery from medial epicondylitis. Passive treatments such as ultrasound, massage, and rest alone without progressive loading will not drive tendon remodeling and provide only temporary symptom relief. Returning to full sport too early based on pain reduction alone, without addressing underlying strength and technique deficits, is a reliable path to recurrence.
Another mistake is failing to assess and address proximal contributors. Shoulder weakness or scapular dyskinesis can alter force transmission through the kinetic chain and increase demand at the medial elbow. A comprehensive upper extremity assessment is often more informative than treating the elbow in isolation.
When It Might Be the UCL, Not the Tendon
The ulnar collateral ligament (UCL) is located on the medial elbow and can be stressed or injured by the same mechanisms that produce medial epicondylitis. UCL involvement should be suspected when symptoms are associated with a specific acute event, when there is medial instability with valgus stress, or when pain is deeper and more ligamentous in quality rather than superficial and tendon-like.
Overhead throwing athletes and those reporting pain during the late cocking and early acceleration phases of throwing or serving warrant careful evaluation for UCL pathology, including possible imaging with MRI or ultrasound. UCL injuries range from low-grade sprains managed conservatively to complete tears requiring surgical reconstruction. Accurate diagnosis is critical before committing to a rehabilitation approach.
A sports medicine provider can differentiate between medial epicondylitis and UCL involvement through clinical examination, and will guide imaging and management accordingly.
A study by Reshadi et al. (2026) published in Cureus found that structured physical therapy remains the first-line recommendation for epicondylitis before moving to injection-based interventions. View on PubMed.
Want expert guidance on your injury or performance goals? Start here or contact our team.