Posterior elbow impingement is a condition where the back of the elbow joint becomes painful and irritated because tissues in the posterior compartment get pinched during elbow extension (straightening). In many active people it feels like a sharp pain right at the end of straightening, often with a sense of a “block”, catching, or grinding. In throwing athletes it is commonly linked to valgus extension overload, sometimes referred to as “pitcher’s elbow”, where repetitive high-speed throwing creates compression and shear forces at the posteromedial (back and inner) elbow.
Posterior elbow impingement can involve different structures: inflamed joint lining (synovitis), cartilage wear, bone spurs (osteophytes) on the olecranon tip or within the olecranon fossa, and sometimes loose bodies (small fragments that move around and catch). In throwers, it can coexist with ulnar collateral ligament (UCL) issues because medial elbow tension and posterior compression often develop together in valgus extension overload patterns.
Physiotherapy for posterior elbow impingement focuses on reducing the pinching forces that keep the joint irritated, restoring pain-free extension, and rebuilding the strength and movement control that protects the elbow during sport and work. For throwers, this includes a structured return-to-throwing plan and addressing the whole kinetic chain (shoulder blade, rotator cuff, trunk, hips) so the elbow is not forced to absorb excessive stress. Physiotherapists also help identify red flags that suggest a more serious issue (for example, significant locking from a loose body, suspected olecranon stress fracture, or symptoms strongly suggestive of UCL instability) and can coordinate referral for imaging and specialist review when needed.
Key Facts
- Posterior elbow impingement is commonly linked to valgus extension overload in throwing athletes and presents with posteromedial elbow pain due to repetitive microtrauma. 🔗
- Posterior elbow impingement isn’t just for throwers, it can affect anyone who repeatedly locks out the elbow (boxing, swimming, racket sports, lifting, gymnastics) and even manual labourers. 🔗
- Athletes often notice it first as a performance issue: less velocity, worse control, or getting tired earlier - before the pain becomes obvious. 🔗
- Most people improve without surgery, but in more persistent or complicated cases where surgery is needed, 97% of athletes returned to their previous activity level — including all professional athletes. 🔗
Risk Factors
- Overhead and throwing sports (baseball/softball, cricket throwing and bowling, tennis serving, volleyball, javelin).
- High training volume, high intensity, or rapid increases in throwing load (particularly preseason or after time off).
- Poor throwing or serving mechanics that increase elbow extension and valgus stress, especially when fatigued.
- Reduced shoulder mobility, poor scapular control, and weak trunk or hip strength shifting load to the elbow.
- History of medial elbow pain or UCL irritation in throwers.
- Gym or work patterns involving frequent elbow lockout under load.
Symptoms
- Pain at the back of the elbow, especially at the very end of straightening (terminal extension pain).
- A catching, clicking, grinding, or “pinching” sensation when locking the elbow straight.
- Loss of full elbow extension, or pain that makes you avoid fully straightening the arm.
- Pain during throwing or serving, often in the late acceleration or follow-through phase, and sometimes reduced performance (speed, accuracy, endurance).
- Swelling or a feeling of fullness around the back of the elbow after sport or heavy training.
- Tenderness around the posteromedial elbow (back and inner side), especially in overhead athletes.
- True locking (the elbow gets stuck) in some cases, which may suggest a loose body.
Aggravating Factors
- Throwing, serving, spiking, or javelin-type actions, particularly high-velocity or high-volume sessions.
- Forcing the elbow into end-range straightening under load (locking out presses, forceful follow-through, triceps-heavy extension).
- Gym tasks that repeatedly load the elbow in extension (dips, push-ups, heavy bench press lockout, handstands in gymnasts).
- Work activities involving repetitive pushing, bracing through the arms, or repeated extension with load.
- Sudden spikes in training volume or intensity, especially after a break or at season start.
Causes
Posterior elbow impingement develops when structures at the back of the elbow are repeatedly compressed or pinched, most commonly during terminal extension. In throwing athletes, this is typically driven by valgus extension overload. During the throwing motion the elbow experiences valgus forces (opening stress on the inner elbow) while rapidly moving into extension, creating repetitive shear and compression at the posteromedial joint. Over time, this can lead to synovitis, cartilage wear, and bony changes such as osteophyte formation at the olecranon and posteromedial trochlea.
Not everyone has the same “impingement piece”. For some, the main driver is inflamed soft tissue that becomes pinched and painful. For others, bony overgrowth (osteophytes) creates a mechanical block. Some people develop loose bodies that can cause catching or true locking. These differences matter because the best treatment plan is different depending on whether the issue is mainly irritation, mainly mechanical, or a combination.
Posterior elbow impingement also overlaps with other common elbow issues in overhead athletes. If the UCL is strained or lax, the elbow may experience more abnormal motion and higher posterior shear, contributing to posteromedial impingement. Conversely, if posterior impingement is treated surgically with excessive bone removal, it can risk destabilising the elbow in some cases. This is why careful assessment and appropriate imaging are important when symptoms persist or when an athlete is considering surgery.
Physiotherapists link the cause back to movement and load. Posterior impingement is often a sign that the elbow is repeatedly being asked to absorb forces that should be shared through the shoulder, scapula, trunk and hips. Improving strength, timing, and technique across this chain is a major part of long-term success, particularly for throwers and overhead athletes.
How Is It Diagnosed?
Diagnosis of posterior elbow impingement begins with a detailed history and a targeted physical examination. Your physiotherapist will ask about your sport or work demands, any recent changes in training load, and whether symptoms are worst at end-range elbow extension or during specific phases of throwing. They will also check for true locking (which may indicate a loose body) and screen for signs of other conditions such as UCL injury or ulnar nerve irritation.
Posterior impingement is suspected when pain at the back or posteromedial side of the elbow is reproduced with end-range extension, particularly when combined with valgus stress in throwing athletes. Your physiotherapist will assess elbow range of motion, joint irritability, strength in the forearm and upper arm, and examine contributing factors such as shoulder rotation, scapular control, trunk strength, and hip strength, as these can all influence elbow loading during overhead activity.
Imaging may be considered if symptoms persist despite appropriate management, if there is mechanical catching or locking, or when return-to-play decisions require confirmation of the diagnosis. In throwing athletes, imaging is also useful for identifying associated pathology.
Physiotherapists are also important for triage. If pain is severe, swelling is significant, there is recurrent locking, there is suspected fracture or stress fracture, or there are strong signs of UCL instability, your physiotherapist will recommend timely medical review and appropriate imaging.
Investigations & Imaging
- X-ray
- Screens for bony changes such as olecranon osteophytes, posteromedial spurs, or loose bodies that may contribute to mechanical impingement.
- MRI
- Assesses soft tissue and cartilage changes, synovitis, bone marrow reaction, and associated issues such as UCL pathology or chondral wear.
- MR arthrogram
- May provide additional detail of intra-articular pathology and can help when standard MRI does not fully explain symptoms in high-demand athletes.
- CT scan
- Provides detailed bone assessment, useful for defining osteophytes, bony impingement anatomy, or suspected loose bodies and for surgical planning.
- Ultrasound
- Can assess soft tissues and may help observe dynamic impingement patterns and guide assessment when performed by experienced clinicians.
Grading / Classification
- Reactive soft tissue
- Involves synovitis and soft tissue pinching at terminal elbow extension. Symptoms are typically load-related and often improve with physiotherapy-led load management and kinetic chain rehabilitation.
- Bony posterior or posteromedial impingement
- Involves osteophytes (bone spurs) at the olecranon tip or posteromedial joint that create a mechanical pinch. Often causes end-range extension pain and may cause a “harder” block or persistent catching.
- Loose body involvement
- Small fragments within the joint can cause catching or true locking. This pattern often needs imaging and may require surgical removal if symptoms persist.
- UCL involvement
- Impingement coexists with medial elbow instability or UCL irritation.Rehab must address both stability and posterior symptoms, and surgical decisions require careful planning.
Physiotherapy Management
Physiotherapy for posterior elbow impingement aims to reduce the pinching forces at the back of the elbow, restore pain-free extension, and build the capacity required for your sport or work. For throwers, it is rarely effective to treat only the elbow. The long-term solution usually includes the shoulder, scapula, trunk and hips because they strongly influence how much stress ends up at the elbow during high-speed overhead movement.
Early physiotherapy focuses on settling irritability. This typically includes temporary reduction in aggravating loads (especially end-range extension under speed), symptom-guided strengthening, and movement retraining so you can keep training safely without repeatedly flaring the posterior joint. If symptoms suggest a mechanical driver such as a loose body, or if pain does not respond as expected, physiotherapists help coordinate imaging and medical review.
As symptoms settle, rehab shifts toward performance: building forearm and triceps endurance, improving shoulder external rotation strength and scapular control, improving trunk rotation and hip strength, and then introducing a structured progression back to throwing or overhead activity. Criteria-based return to sport is strongly emphasised in elbow rehab frameworks for overhead athletes.
Exercise
Posterior exercises are selected to improve capacity without repeatedly compressing the posterior elbow. Your physiotherapist adjusts exercise choices based on whether symptoms are mainly irritation-based or mechanical.
Early phase: Often focuses on maintaining comfortable elbow range while avoiding repeated forced terminal extension. Strength work typically starts with pain-tolerable loading of the forearm and upper arm, including controlled gripping, wrist and forearm rotation endurance, and triceps strength in mid-range (rather than repeated lockout). For throwers, shoulder blade control and rotator cuff endurance are introduced early because improved proximal control can immediately reduce elbow stress during modified throwing drills.
Strength and control phase: Progression usually includes more robust triceps strengthening (still avoiding aggressive painful lockout), shoulder external rotation and scapular stabiliser strengthening, and trunk and hip strength. This is where many athletes notice meaningful change because the elbow is no longer asked to create all the speed and control alone. The rehab is deliberately “whole-body” because that is how throwing actually works.
Power and return-to-throwing phase: For overhead athletes, exercises progress into medicine ball patterns, trunk rotation power, deceleration control, and then a structured return-to-throwing program. Return-to-throw planning emphasises progressive loading and consistent throwing mechanics (including scapular control and trunk use) rather than abrupt return to maximal throws.
Activity Modification
Activity modification is often the fastest way to reduce posterior elbow impingement symptoms, because the condition is strongly driven by repeated compression at end-range extension. The goal is not to stop moving, but to stop the specific pattern that keeps the posterior joint irritated.
For throwers, this commonly means a temporary reduction in throwing volume and intensity, removing maximum-effort throws, avoiding long-toss and high-stress drills early, and spacing throwing days to allow the elbow to settle. Physiotherapists help plan a return-to-throw schedule that increases distance, volume and intensity gradually rather than jumping straight back into full sessions.
For gym training, it often means avoiding repeated painful lockout tasks (heavy dips, heavy bench lockout, repeated triceps extension into end-range) and substituting pain-tolerable pressing patterns and strength work that does not reproduce sharp posterior pinch.
For work, modification might include pacing repeated pushing tasks, changing hand positions, avoiding prolonged elbow-locked positions, and scheduling heavier tasks after symptoms have improved.
Manual Therapy
Manual therapy can be useful when it improves comfortable motion and reduces protective muscle guarding, allowing you to progress exercises more effectively. A physiotherapist may use hands-on treatment to address stiffness in the elbow, forearm, wrist, or shoulder that is contributing to altered mechanics and increased posterior pinch.
For throwers, manual therapy often targets shoulder and thoracic mobility alongside the elbow because restricted shoulder rotation can shift stress toward the elbow. Manual therapy is not used as a stand-alone fix. It is used to create a window where exercise and technique work can be performed with better quality and less irritation.
Dry Needling
Dry needling is sometimes used as an adjunct in posterior elbow impingement physiotherapy when muscle guarding or myofascial pain is limiting progress. This is most relevant when the triceps, forearm muscles, or shoulder girdle muscles become overactive due to pain and altered mechanics.
Dry needling does not remove the impingement driver on its own, particularly if bony spurs or loose bodies are the main issue. It can, however, reduce protective tightness so you can restore range, strengthen more comfortably, and improve throwing mechanics. Physiotherapists use it as part of a broader rehab plan, not as the primary treatment.
Heat & Ice
Ice can help settle a reactive posterior elbow after training, especially early in rehabilitation. Heat may help if stiffness and muscle tightness are prominent and warmth improves comfortable movement before exercise.
These are supportive strategies. The main drivers of improvement are load modification, progressive strengthening, and technique retraining so the elbow is not repeatedly pinched at terminal extension.
Education
Education is central to successful recovery because posterior elbow impingement commonly becomes a cycle: pain leads to altered mechanics, altered mechanics increase elbow stress, and stress keeps the posterior joint irritated.
Your physiotherapist will explain why end-range extension can pinch the posterior elbow and why reducing that specific load temporarily is often necessary. For throwers, education includes a structured return-to-throwing plan and technique cues that reduce elbow overload, such as improved scapular control and trunk contribution during the throw.
Education also includes recognising when symptoms suggest something more than a simple overload issue. True locking, rapidly worsening pain, or symptoms consistent with UCL instability may require imaging and specialist review, which is reflected in current reviews of posteromedial impingement assessment and treatment.
Other
Other important parts of management often include:
Throwing mechanics and workload planning: Posterior elbow impingement in throwers is often a workload problem as much as a tissue problem. Physiotherapists commonly coordinate with coaches to manage throwing volume, spacing, and intensity while mechanics improve.
Screening for co-existing pathology: Posteromedial impingement can coexist with UCL problems and cartilage wear. Comprehensive assessment helps determine whether rehab should prioritise stability work, posterior symptom control, or both.
Objective progression: Tracking range of motion (especially extension), grip and forearm endurance, scapular control, and throwing tolerance helps guide progression and reduces the risk of repeated flare-ups.
Sport-specific return conditioning: Rehabilitation often includes gradually reintroducing the specific loads that trigger symptoms, such as long throws, serves, or spike volume, with planned increases rather than sudden return to full training.
Other Treatments
Other treatments may be used alongside physiotherapy depending on severity and the presence of mechanical symptoms:
Medication: Short-term pain relief or anti-inflammatory medication may be used for symptom control, guided by your GP or pharmacist. It should not be used to push through maximal throwing loads while the elbow is still reactive.
Injection options: In some cases, sports physicians may consider injections for significant synovitis or pain modulation. These decisions depend on diagnosis and overall management goals and should be paired with a structured physiotherapy plan rather than replacing rehab.
Technique coaching: For throwers, coaching input is often valuable to reduce valgus extension overload contributors, particularly when fatigue or mechanics are driving symptoms. Return-to-throw frameworks emphasise progressive exposure and consistent mechanics.
Specialist review: If there is persistent catching, true locking, suspected loose body, suspected olecranon stress fracture, or suspected UCL instability, specialist assessment and imaging may be appropriate.
Surgery
Surgery is considered when posterior elbow impingement has a strong mechanical driver (for example, symptomatic osteophytes or loose bodies) or when a well-structured rehabilitation program fails to restore pain-free function and sport performance. In throwing athletes, arthroscopic decompression with posteromedial osteophyte removal is described as providing effective clinical results and return to play, but surgeons must avoid over-resection that could contribute to medial (UCL) instability.
Surgery is not a short-cut around rehabilitation. Physiotherapy is crucial both before and after surgery. Pre-operative physiotherapy focuses on maintaining shoulder and trunk capacity and optimising mechanics. Post-operative physiotherapy progresses elbow range of motion, strength, and a carefully staged return to throwing. For many athletes, the return-to-throw timeline is guided by pain response, strength, and objective criteria rather than a fixed date.
Prognosis & Return to Activity
Prognosis depends on what is being pinched and how quickly the loading pattern is addressed. People with mainly reactive soft tissue impingement often improve well with physiotherapy-led load modification and strengthening, particularly when they stop repeatedly forcing painful terminal extension and improve whole-chain mechanics for overhead tasks.
If osteophytes or loose bodies are a major driver, symptoms may improve partially with physiotherapy but can persist if mechanical catching remains. In these cases, arthroscopic management may be considered, and current reviews describe effective outcomes and return to play when surgery is appropriately indicated, with attention to preserving elbow stability.
Return to throwing is typically a staged process. Athletes who follow a structured return-to-throw progression and address scapular control, trunk strength, and workload planning tend to have better outcomes than those who rest and then abruptly return to maximal throwing.
Complications
- Persistent loss of elbow extension or ongoing pain at terminal extension if the impingement driver is not addressed.
- Loose bodies causing catching or true locking, potentially requiring surgical removal if symptoms persist.
- Progressive cartilage wear in high-load overhead athletes if valgus extension overload continues unchecked.
- Co-existing medial elbow instability or UCL irritation, which can complicate management and return to play.
Preventing Recurrence
- Avoid sudden spikes in throwing, serving, or overhead volume. Build workload gradually, especially after time off, to reduce repetitive valgus extension overload at the posteromedial elbow.
- Do not repeatedly force painful terminal elbow extension (including heavy lockout lifting) during flare-ups, as this perpetuates posterior pinching and inflammation.
- Maintain strong scapular control, rotator cuff endurance, trunk rotation strength and hip power, because improved kinetic chain function reduces stress transferred to the elbow during high-speed overhead movement.
- Use a structured return-to-throwing plan after any posterior elbow pain episode rather than “testing it” with a hard session, as abrupt return is a common trigger for recurrence.
When to See a Physio
- You have sharp pain at the back of the elbow with end-range straightening that does not improve after a short period of load modification.
- Your elbow catches or locks, particularly if it gets stuck, which can suggest a loose body.
- Throwing, serving, or overhead sport performance has dropped (speed, accuracy, endurance) due to posterior elbow pain.
- You have symptoms suggesting associated UCL issues (medial elbow pain, instability) or recurrent ulnar nerve symptoms.
- You need a structured posterior elbow impingement rehab plan, including return-to-throwing progression and workload planning.
- Symptoms persist despite physiotherapy and you need reassessment and guidance on imaging or specialist referral.