Golfers feel it at impact. Climbers feel it locked onto a crimped edge: a persistent ache along the inside or outside of the elbow. Commonly labeled golfer's elbow and tennis elbow, this pain rarely starts in the elbow joint itself. It comes from the tendons of the forearm muscles that drive wrist movement, worn down by repeated microtrauma that outpaces the body's ability to repair it. Early on, the ache shows up only right after a session. Left alone, it tends to progress until everyday tasks like turning a doorknob or shaking hands start to hurt too, which is why pinning down the actual cause early matters more than it might seem.
This guide separates two very different movement patterns, golf swings and climbing crimps, and explains why each one loads a different part of the elbow. It walks through eccentric-exercise rehab principles and how near-infrared LED can support a wellness routine built around them. Once you understand the mechanism behind the pain, you can plan beyond simply resting the sore spot, toward movement correction and strength rebalancing that actually reduce the odds of it coming back.
Golfer's Elbow vs Climber's Elbow: What's Different
Golfer's Elbow vs Climber's Elbow: What's Different
Elbow overuse pain falls into two broad categories based on where it shows up. Pain around the bony bump on the inside of the elbow, the medial epicondyle, is commonly called golfer's elbow, or medial epicondylitis. Pain around the bump on the outside, the lateral epicondyle, is tennis elbow, or lateral epicondylitis. Climbers repeat the crimp grip, a forceful curling of the fingers, which concentrates load on the finger flexor attachment at the medial epicondyle, so clinically, climbers often end up with pain in the same spot as golfer's elbow. Racquet sports and jobs that lean heavily on the wrist extensors, cocking the back of the hand upward again and again, tend toward lateral epicondylitis instead. Both types share the same underlying mechanism, repetitive eccentric loading on a specific muscle group, and where the pain lands ultimately comes down to which muscles were overused, and in which direction.
Where the Golf Swing Loads the Elbow
At impact, the lead arm's wrist, the left arm for a right-handed golfer, absorbs a burst of deceleration and rotational force at the same instant. Hitting the mat or the ground behind the ball, a fat shot, sends a sudden jolt through the wrist flexors, and repeated jolts accumulate as microdamage at the medial epicondyle. Gripping the club too tightly, using a grip that's too thin, and swing patterns that try to make up for clubhead speed with a wrist snap are the usual suspects behind that damage.
Where the Climbing Crimp Grip Loads the Elbow
In climbing, crimping, curling the first knuckle deeply to latch a small hold, generates enormous tension in the flexor digitorum profundus and superficialis. Because those tendons attach right at the medial epicondyle, repeated crimping loads that spot directly. Bouldering sessions packed with short, high-intensity moves, indoor training heavy on small holds, and jumping straight into hard problems without warming up are flagged as risk factors in coaching literature. It's also worth considering that when training frequency climbs without enough recovery time between sessions, microdamage accumulates faster than the tendon can repair itself.
Not Inflammation, Structural Tendon Degeneration
This condition used to be called epicondylitis, an inflammatory diagnosis. But histological studies have repeatedly shown that the core pathology isn't acute inflammatory cell infiltration, it's angiofibroblastic degeneration, where the tendon's collagen architecture becomes disorganized and blood vessels and nerve fibers proliferate abnormally. That's why epicondylalgia, or tendinopathy, is now considered a more accurate term than epicondylitis. The distinction changes management too: instead of simply calming inflammation, the priority has shifted to progressively loading the tendon so it can tolerate normal stress again. Clinical observation consistently notes that once epicondylalgia becomes chronic, long-term NSAID use tends to offer limited benefit.
Research Evidence on Near-Infrared Phototherapy
A systematic review and meta-analysis by Bjordal JM and colleagues, published in BMC Musculoskeletal Disorders in 2008, examined randomized controlled trials of low-level laser therapy, including low-power near-infrared sources, in patients with lateral epicondylitis. Trials that met specific criteria for wavelength, around 904nm, treatment site, and adequate dose showed significant reductions in pain and improvements in grip strength; the review emphasized that following irradiation parameters precisely made a meaningful difference in outcomes. In practice, that means using NIR without standardizing distance, duration, and treatment site is unlikely to produce the expected response. Separately, a randomized controlled trial by Coombes BK and colleagues, published in JAMA in 2013, compared corticosteroid injection, physiotherapy, and placebo in patients with lateral epicondylalgia. The steroid injection group improved fastest in the short term, but at one year its recurrence rate was actually higher than in the physiotherapy group or the wait-and-see group. Together, these two studies suggest that for elbow overuse pain, an exercise-based approach that drives tendon remodeling, paired with non-invasive light-based support, may be more sensible over the long run than chasing immediate symptom suppression.
Incidence and Risk Factors
Lateral epicondylitis is reported to affect roughly 1 to 3 percent of the general population each year, with the highest rates between ages 35 and 55. Observational studies of golfers repeatedly find that beginners and players whose swing mechanics haven't stabilized yet report elbow pain at higher rates. The likely explanation is that experienced players transfer force through trunk rotation, taking load off the wrist and elbow, while beginners tend to rely on wrist strength instead. A similar pattern shows up in climbing: coaches widely report that climbers with short training histories who suddenly ramp up volume, or who push hard crimp holds beyond what their finger strength can handle, develop pain more often.
Eccentric Exercise and NIR Application Protocol
Eccentric Exercise and NIR Application Protocol
Why Eccentric Exercise Is the Key
Tendons appear to remodel collagen most actively when adapting to eccentric loading, the kind of load that lengthens tissue under tension. For golfer's elbow, that means eccentric wrist flexor work: bending the wrist, then slowly straightening it against resistance. For tennis elbow, it's eccentric wrist extensor work: cocking the wrist back, then slowly lowering it. Clinical rehab commonly recommends starting with a resistance band or a light dumbbell, 0.5 to 1kg, staying within a pain range of 3 out of 10 or lower, for 15 reps per set, 3 sets, once or twice a day.
Extra Work for Climbers: Band-Resisted Finger Extension
In sports like climbing that hammer the finger flexors, training the opposing extensors is important for preventing recurrence. Wrapping a rubber band around all the fingers and opening them against resistance, 15 to 20 reps per set, roughly 2 sets a day, helps close the strength gap between flexors and extensors. Golfers benefit from the mirror image: adding wrist extensor strengthening as a supplemental exercise to balance the front and back of the forearm.
Progressive Overload Principle
Once you can complete 3 sets comfortably without pain, increase resistance by 10 to 15 percent or add reps to progress the load. Rehab programs consistently emphasize small increases every 1 to 2 weeks rather than big jumps, since large jumps raise the risk of a flare-up. Keeping a simple log of exercise intensity makes it much easier to spot exactly when pain started creeping back in.
Area-Specific NIR Application Guide
| Phase | Area | Wavelength | Distance/Duration | Frequency |
|---|---|---|---|---|
| Acute irritation (post-exercise pain) | Local medial or lateral epicondyle | Centered on 660nm | Skin contact to 2cm, 8-10 min | Once daily after exercise |
| Early-to-mid rehab | Epicondyle plus forearm muscle belly (3-4cm range) | 660nm + 850nm combined | 2-3cm distance, 10-12 min | 4-5x per week |
| Return-to-sport prep | Full forearm to wrist | Centered on 850nm | 3cm distance, 12-15 min | Before and after exercise, 3-4x per week |
Application Order and Timing
Step one, perform the eccentric exercise first. Step two, apply NIR within 10 to 15 minutes of finishing, timed to when muscle metabolic activity is elevated. Step three, cover the forearm muscle belly along the tendon's path, not just the epicondyle itself. Step four, follow with light stretching and hydration. In practice, it helps to split usage by timing: the day before a round of golf or a climbing session, keep exposure short and centered on 660nm to limit irritation; the day after, lean toward a higher share of 850nm to support recovery. Recording total dose, power density in mW/cm² multiplied by time in seconds and divided by 1000, gives you a J/cm² figure that makes it easier to reproduce the same exposure session after session. For wrist stretching positions, the range-of-motion self-check described in the frozen shoulder self-test guide can be adapted for the elbow and wrist.
Recovery Stages and Return-to-Sport Criteria
Recovery Stages and Return-to-Sport Criteria
Stage-by-Stage Recovery Markers
- Weeks 1-2: Less pain during daily tasks such as turning a doorknob or lifting a cup, and early tolerance building for eccentric exercise
- Weeks 3-6: Trying low-intensity swing practice or gentle bouldering moves, grip strength reaching roughly 80 percent of the uninvolved arm
- Weeks 6-12: Full swings or crimp movements performed repeatedly without pain, grip strength restored to 90-100 percent before stepping back up to full intensity
A Simple Self-Test for Return-to-Sport Readiness
One useful benchmark is whether you can hold resisted wrist extension with the elbow straight, pain-free, for at least 5 seconds, the Cozen's test used for lateral epicondylitis, or the equivalent resisted wrist flexion test used for medial epicondylitis. Grip strength is especially useful for judging sport readiness: measuring it with a dynamometer at the same time each week and logging the numbers gives you an objective way to track real strength recovery that pain alone, being subjective, can't capture on its own.
Sample Return-to-Sport Program
| Week | Golf | Climbing |
|---|---|---|
| Weeks 1-2 | Putting and short approach shots only | Easy-grade open-hand traversing |
| Weeks 3-4 | Half swings, low-numbered iron practice | Moderate-intensity bouldering, minimal crimping |
| Weeks 5-8 | Full-swing range sessions | 70-80 percent of usual climbing intensity |
| Week 9+ | Return to rounds, prioritizing form over score | Return to usual intensity, gradually restoring crimp volume |
Things to Watch When Returning to Golf or Climbing
Clinical observation consistently flags that jumping straight back to previous intensity as soon as pain disappears raises the recurrence rate. For golfers, checking grip thickness and swing tempo matters; for climbers, increasing the share of open-hand grips and capping crimp reps per session both help load the tendon back up gradually rather than all at once, which is important for avoiding a repeat injury.
Why Tracking Recovery on Paper Matters
Logging pain scores, grip strength numbers, and that day's exercise or sport intensity in a simple table or notes app every week makes it much easier to catch a recovery plateau or spot a pattern of pain returning with a specific movement. For example, measuring grip strength with a dynamometer at the same time every Sunday, alongside how many golf rounds or climbing sessions happened that week, goes a long way toward understanding the relationship between load and recovery on your own. A phone notes app or a basic spreadsheet is plenty; what matters is measuring consistently under the same conditions.
Movement Correction and Precautions
Movement Correction and Precautions
Sample Warm-Up Routines
For golf, a good warm-up is static wrist flexion and extension stretches, 20 to 30 seconds each direction for 2 sets, followed by 10 to 15 easy half-swings before moving into full swings. For climbing, 5 to 10 minutes of low-intensity open-hand traversing to get blood flowing in the fingers and forearms, followed by a few moderate-intensity problems before attempting maximum-intensity moves, is a sound progression for preventing injury.
Sport-Specific Movement Correction Points
- Golf: Avoid gripping the club too tightly, transfer force through trunk rotation rather than forcing the wrist to snap at impact, and consider switching to a thicker grip if the current one is too thin
- Climbing: Cut down on crimp grip use in favor of open-hand or half-crimp positions, warm up fingers and wrists thoroughly before each session, and lower bouldering intensity or rest entirely on days when pain is present
Precautions for NIR Use
- Never irradiate the eyes directly; protective goggles are recommended
- Consult your physician if you're taking photosensitizing medications, such as tetracyclines or amiodarone
- Discontinue immediately if a skin reaction occurs, such as persistent redness or blistering
- Use NIR as a complementary wellness tool alongside exercise-based rehab, not a substitute for it
Signs That Warrant a Medical Visit
If pain at the medial epicondyle comes with numbness or tingling down the little and ring fingers, the ulnar nerve running along the inside of the elbow may be irritated, which calls for a different approach than a straightforward tendon problem. In that situation, or if night pain keeps disrupting sleep, or if 4 or more weeks of self-management bring no real improvement, it's worth seeing an orthopedic or rehabilitation medicine specialist for an ultrasound or neurological exam. If ultrasound turns up tendon thickening, hypoechoic lesions, or increased local blood flow, that finding can help guide a structured physical therapy plan tailored to the actual state of the tissue.
Check Your Equipment and Environment Too
For golfers, a club shaft that's too stiff relative to swing speed can transmit impact shock directly into the wrist and elbow, so periodic fitting checks are worth the time. For climbers, sessions built around small, sharp-edged holds increase crimp load, so it helps to build warm-up routes around open-hand grips and save maximum-intensity attempts for later in the session, once the body is properly warmed up. In both sports, prioritizing movement quality over intensity or volume while pain is present meaningfully reduces the odds of a repeat injury. Filming your swing or your climbing with a coach or trainer, then reviewing swing path or grip position objectively, can also help pinpoint the actual cause.
