YR Sports Lab
After one gi class your forearms feel like they have been filled with lead, the bone on the outside of your elbow is tender to the touch, and the next day turning a doorknob, wringing out a towel or lifting a coffee mug sends a reminder ache through the arm. This is not a strain and it is not a single accident. It is epicondylitis built up by long-term hard gripping, better known as tennis elbow and golfer's elbow. Jiu-jitsu is one of the few sports that puts gripping at the centre of every exchange, and Hinz and colleagues, surveying 1,140 BJJ athletes, found that upper-limb injuries made up 30.2% of all injuries, with the hand, fingers, forearm and elbow taking the first hit from grip load. Using StatPearls and the eccentric-training literature, this article explains why a pulling action damages the wrist extensors, why the problem is degeneration rather than inflammation, how to tell the inner and outer sides apart with simple self-tests, and how to run an 8-week elbow plan built around the Tyler Twist and FlexBar eccentric rebuild.
1. Two Bony Bumps, Two Tendons: The Load Landmarks of the Elbow
On each side of the elbow sits a palpable bony prominence that serves as the shared origin for a large group of forearm muscles. The outer one is the lateral epicondyle, the attachment for the wrist and finger extensors, of which the extensor carpi radialis brevis (ECRB) is by far the most common troublemaker. The inner one is the medial epicondyle, the common origin of the wrist flexors and pronators; this roughly 3-centimetre common flexor tendon is formed by the pronator teres, flexor carpi radialis, palmaris longus, flexor digitorum superficialis and the humeral head of flexor carpi ulnaris.
When repetitive loading produces degenerative change at these tendon insertions, the results are called lateral epicondylitis (tennis elbow) and medial epicondylitis (golfer's elbow) respectively. The names come from racket and club sports, but the real cause is repetitive load exceeding what the tendon can tolerate, and any prolonged, high-tension gripping or rotating action can trigger it. Gi gripping is squarely on that list. Understanding these two landmarks underpins every self-test and exercise that follows, because which side hurts determines which tendon you need to train.
The one-line diagnosis
Outer pain (tennis elbow) = a wrist extensor problem: with the back of the hand facing up, resisted wrist extension hurts.
Inner pain (golfer's elbow) = a wrist flexor and pronator problem: resisted wrist flexion, or turning the forearm into pronation (palm down), hurts.
Gi gripping in jiu-jitsu can produce either one, which is exactly why it differs from plain "tennis elbow" and has to be managed side by side.
2. The Gi-Grip Paradox: Why Pulling Injures the Wrist Extensors
Intuitively, gripping and pulling are jobs for the flexors, so only the inner side should suffer. Yet the most common complaint in the gym is lateral tennis elbow, and the reason lies in an easily overlooked mechanical detail: for the fingers to squeeze hard, the wrist must first be stabilised. As the finger flexors dig into the fabric, the wrist would be dragged into flexion along with them unless the wrist extensors hold it in slight extension, and grip force would collapse. In other words, every hard gi grip has your wrist extensors working isometrically to stabilise the wrist, with the ECRB insertion absorbing that pull day after day. This is also why grip-strength testing correlates so strongly with tennis elbow.
The common flexor tendon on the inside takes its beating from a different set of actions: forceful wrist flexion, pulling the gi toward your body, and forearm pronation. Yanking down on sleeve and collar grips, collar drags, and pronating an opponent's arm to pin it all load the medial epicondyle repeatedly. What makes jiu-jitsu gripping unusually hard on the elbow is that it combines three amplifying factors: high tension (you are working against a resisting human), long duration (a single stalemate can last tens of seconds) and high frequency (hundreds of grip-and-release cycles per class). This kind of high-tension isometric holding is the textbook trigger pattern for tendinopathy.
It is worth stating plainly that no study has specifically measured epicondylitis prevalence in the jiu-jitsu population; the pathology and treatment data cited here come from general population and occupational or athletic cohorts. But gripping is a core action jiu-jitsu cannot avoid, and putting grip biomechanics alongside the 30.2% upper-limb injury share explains why this is an extremely common overuse injury on the mats that is nonetheless rarely managed correctly.
3. It Is Degeneration, Not Inflammation: The Pathology the Name Hides
The "-itis" in epicondylitis makes people assume inflammation is the problem, so they ice endlessly, take anti-inflammatories, and wait for it to pass. Histology overturned that long ago: StatPearls notes that both medial and lateral epicondylitis are fundamentally degenerative tendinopathy (tendinosis) rather than inflammation. Biopsies show disorganised collagen fibres, collagen breakdown, increased mucoid ground substance and fibroblast proliferation, with classic inflammatory cell infiltration minimal or entirely absent. That is why the field increasingly prefers "tendinopathy" over the inflammation-flavoured "tendinitis".
The practical implication is substantial: if it is not inflammation, rest and anti-inflammatories alone will never make a degenerated tendon strong again. What genuinely changes the course of the condition is progressive, controlled mechanical loading that stimulates collagen to realign and remodel, and that is the theoretical basis for eccentric training as first-line care. Rest only sends the pain away temporarily; return to heavy gripping and an unrebuilt tendon simply gets blown out again.
4. Prevalence and Populations: How to Read the Numbers
Epidemiologically, neither condition is rare. Lateral tennis elbow has a general-population prevalence of roughly 1% to 3%, peaking between ages 40 and 50 and mostly affecting the dominant arm. Medial golfer's elbow is comparatively uncommon, with general-population prevalence below 1%, though it rises to 3.8% to 8.2% in high-risk occupational and athletic groups. It accounts for only 10% to 20% of all epicondylitis cases, occurs about twice as often in men as in women, affects the dominant arm in about 75% of cases, and peaks between the ages of 45 and 64.
One point deserves particular attention from the jiu-jitsu crowd: the ulnar nerve. StatPearls reports that roughly 20% of medial epicondylitis cases also involve ulnar neuropathy, because the ulnar nerve passes through the cubital tunnel directly behind the medial epicondyle. That explains why some people with inner-elbow pain also get numbness in the pinky and ring finger, which is beyond a pure tendon problem and is managed differently (see the red flags in section 8). The good news is that the prognosis is generally excellent, with over 90% of patients improving with non-surgical treatment.
| Comparison | Lateral epicondylitis (tennis elbow) | Medial epicondylitis (golfer's elbow) |
|---|---|---|
| Tendon involved | Wrist extensors (mainly ECRB) | Common flexor tendon (pronator teres, FCR, etc.) |
| Site of tenderness | Lateral epicondyle | Medial epicondyle |
| Provoking movement | Resisted wrist extension, hard gripping | Resisted wrist flexion, forearm pronation, pulling |
| General-population prevalence | About 1–3% | Below 1% (3.8–8.2% in high-risk groups) |
| Share of all epicondylitis | About 80–90% | About 10–20% |
| Common comorbidity | Radial tunnel syndrome (uncommon) | Ulnar neuropathy (about 20%) |
| Core treatment | Eccentric wrist extensor loading | Eccentric wrist flexor and pronator loading |
5. Self-Testing: Check Each Epicondyle Separately
Before treating it as a tendinopathy, confirm the painful spot and the provoking movement. This keeps you from mistaking a nerve problem for a tendon one. The following are clinically common tests that can be roughly self-administered at home, but a positive result is only a pointer, not a diagnosis; a medical assessment remains the standard.
Lateral (tennis elbow): straighten the arm with the back of the hand facing up, use the other hand to press down on the back of your hand, and resist by extending the wrist upward. Pain provoked at the lateral epicondyle is positive, approximating the clinical Cozen test. An alternative is to extend the fingers and resist someone pressing down on your middle finger; pain on the outside points to ECRB involvement (the Maudsley test). Medial (golfer's elbow): with the palm facing up, resist wrist flexion toward the palm side, or pronate the forearm (rotating the palm from up to down). Pain provoked at the medial epicondyle is positive. On both sides, also check whether the pinky and ring finger feel numb, which is an ulnar nerve signal.
Note down the movement that hurts, and you have your starting point
The logic of tendinopathy treatment is to load progressively in the direction that hurts: outer pain means eccentric wrist extension, inner pain means eccentric wrist flexion and pronation. So the movement that provokes your pain during self-testing is precisely the movement you should be gradually loading during the rebuild. This is why distinguishing inner from outer matters so much; training the wrong direction is not just ineffective, it can also overload the healthy tendon on the other side.
6. Eccentric Rebuild: The Evidence for the Tyler Twist and FlexBar
Eccentric training (producing force while the muscle lengthens) is first-line for tendinopathy because it delivers high-tension mechanical stimulus and promotes collagen remodelling without the re-irritation that concentric or explosive work tends to cause. For lateral tennis elbow, the most representative tool is a rubber bar, the FlexBar, paired with the Tyler Twist: the healthy side twists tension into the bar, then the affected side's wrist extensors let it "slowly untwist" back, placing the load on the eccentric phase.
The prospective randomised trial by Tyler and colleagues, published in the Journal of Shoulder and Elbow Surgery in 2010, showed that adding this progressive eccentric protocol to standard physical therapy significantly improved pain and function in chronic lateral epicondylosis and narrowed the side-to-side deficit in wrist extensor strength. Later trials have continued to support it: a 2023 randomised controlled study in Cureus compared the Tyler Twist with active release technique (ART), and post-treatment mean grip strength in the Tyler Twist group reached 24.13 kg versus 21.33 kg in the comparison group, indicating better restoration of grip strength. The logic for medial golfer's elbow is identical, simply swapping the target to the wrist flexors and pronators; in fairness, however, the great majority of high-quality eccentric trials were performed on lateral epicondylosis, direct evidence on the medial side is comparatively sparse, and the medial application is a mechanistically reasonable extension.
| Exercise | Target tendon | Eccentric execution | Suggested dose |
|---|---|---|---|
| Tyler Twist (FlexBar) | Lateral wrist extensors | Twist tension in with the healthy side, slowly release via wrist extension on the affected side | 3 sets × 15 reps, about 4 seconds per release |
| Reverse Tyler Twist | Medial wrist flexors | Twist tension in with the affected side, release slowly through wrist flexion | 3 sets × 15 reps, about 4 seconds per release |
| Eccentric dumbbell wrist extension | Lateral wrist extensors | Lift with the healthy hand, lower the wrist slowly with the affected hand | 3 sets × 15 reps, start light |
| Eccentric dumbbell wrist flexion | Medial wrist flexors | Palm up, lower the wrist slowly into full extension | 3 sets × 15 reps, start light |
| Eccentric pronation / supination | Medial pronators | Control forearm rotation slowly with a hammer-style dumbbell | 2 sets × 12 reps per direction |
When performing eccentrics, "mild discomfort is acceptable, sharp pain means regress" is the general rule: soreness that stays no worse than moderate and settles by the next day is allowed, but if pain keeps climbing after training or disturbs your sleep, the load is too high and you should cut volume or slow down. Tendon remodelling is measured in weeks; most cases improve markedly after 6 to 12 weeks of consistent training, so do not quit because two or three days brought no progress.
7. An 8-Week Elbow and Grip-Management Plan
Training is only half of it. The other half is dialling daily grip load down into a range the tendon can handle. Hammering eccentrics while leaving your gripping habits untouched is like repairing a bridge while continuing to overload it. The plan below ties the eccentric rebuild to load management, run 3 times a week, either on non-training days or immediately after class.
Cut sustained deep gi grips in half for now: roll more no-gi and spend less time locked in long sleeve and collar stalemates. Maintain blood flow with pain-free isometric gripping (squeeze a soft ball for 5 seconds × 10 reps) and use brief icing for pain right after a flare.
Pick the Tyler Twist or its reverse version based on the painful side: 3 sets × 15 reps with a 4-second release, 3 times a week. Add forearm stretching plus pronation and supination mobility. Mild next-day soreness is acceptable; sharp pain means regress.
Move up one level of eccentric resistance (a stiffer FlexBar or more dumbbell weight) and add eccentric pronation and supination. Start reintroducing gripping into rolling, but favour "short holds, frequent switches" over long death grips.
Add gi hangs (a towel or gi over a pull-up bar) progressing to 20 seconds and eccentric grip work (slow-release gripping), and resume full gi rolling. Keep 2 eccentric sessions a week as long-term maintenance to prevent relapse.
Three grip-management habits you can use immediately
・Short holds, frequent switches: rather than clamping one grip and fighting to the death, switch grips and sides often to shorten each bout of isometric tension.
・Hook instead of clamping: wherever you can hook with the palm and pull with the big muscles (back and biceps), use less full-force finger clamping on the fabric, shifting load from tendon back to muscle belly.
・Mix in no-gi: during symptomatic periods, convert part of your schedule to no-gi, removing the single biggest trigger, sustained deep gi grips, and giving the tendon a window to rebuild.
8. Managing Acute Flares and Red Flags for Medical Review
When the elbow flares clearly after a grip-heavy class with local swelling and pain, brief icing for pain relief and 2 to 3 days off the provoking movements are reasonable, but do not treat "resting until it stops hurting" as the finish line; the key is still returning to progressive eccentrics. Epicondylitis is overwhelmingly a conservatively managed overuse injury, with over 90% of cases needing no surgery, but the following situations suggest it may be more than a simple tendon problem and warrant assessment by an orthopaedic or physical medicine specialist.
・Inner-elbow pain with numbness or tingling in the pinky and ring finger (ulnar neuropathy red flag; about 20% of medial epicondylitis cases involve it)
・Clearly reduced grip strength, suddenly dropping objects, or visible forearm muscle wasting
・Pain that does not vary with movement, or wakes you at night, or comes with unexplained weight loss (non-tendon causes must be excluded)
・Marked redness, swelling and heat at the elbow, or a sudden loss of joint range of motion (infection or intra-articular pathology must be excluded)
・No sign of improvement after 3 months of consistent eccentric work and load management
The recommended order of return is: first make daily tasks (doorknobs, wringing towels, carrying bags) pain-free, then restore pain-free eccentric loading and grip strength, and only then add back rolling with long, deep gi grips. Zoomed out across the whole timeline, epicondylitis is not "an injury you sustained once" but "a chronically overloaded tendon waiting to remodel". People who are willing to deload during symptomatic phases and load eccentrically on a regular schedule generally get back to full-volume gripping, while those who relapse repeatedly are usually the ones who go straight back to death-gripping the moment the pain fades, skipping the rebuild entirely.
FAQ
Can I keep training jiu-jitsu with elbow pain?
Most mild to moderate cases of epicondylitis do not require stopping completely, but you do need to stop the movements that hurt. The key is cutting the volume of sustained, deep gi grips: roll more no-gi, spend less time in prolonged sleeve and collar stalemates, and do your eccentric work after class. If holding a water bottle or turning a doorknob hurts, or your grip strength has clearly dropped, take a 2 to 4 week break from grip-heavy rolling so the degenerated tendon has time to remodel.
How do I tell tennis elbow from golfer's elbow?
Look at which side of the elbow is tender. Pain over the outer bony bump (lateral epicondyle) that is provoked by resisted wrist extension or by resisting pressure on the middle finger is tennis elbow (lateral epicondylitis, wrist extensor overload). Pain over the inner bony bump (medial epicondyle) provoked by resisted wrist flexion or forearm pronation is golfer's elbow (medial epicondylitis, common flexor tendon overload). Gi gripping in jiu-jitsu can produce either one, because a hard grip needs the wrist extensors to stabilise the wrist while pulling and pronating load the flexors.
Should I ice or heat epicondylitis, and how long until it settles?
It is fundamentally a degenerative tendinopathy rather than acute inflammation, so ice is only a short-term painkiller right after a flare when the area is hot and swollen; long-term recovery comes from progressive eccentric loading that remodels the tendon. Recovery is measured in months: most cases improve markedly after 6 to 12 weeks of consistent eccentric training and over 90% recover without surgery, but complete resolution can take several months, and returning to heavy gripping too early is the most common cause of relapse.
Do elbow straps (tennis elbow braces) actually work?
A forearm counterforce strap is a useful short-term aid: it spreads stress into the muscle belly and reduces pull on the tendon insertion, so wearing it during training or work can lower provoked pain. But it does not heal the tendon and it is no substitute for eccentric training. What actually changes the course of the condition is progressive loading plus a change in gripping habits; the strap is only a bridge that helps you tolerate daily loads while you rebuild.
My elbow hurts and my pinky and ring finger tingle. Is that the same problem?
Not necessarily, and this is a red flag that warrants a medical review. The literature reports that roughly 20% of medial epicondylitis cases also involve ulnar neuropathy, because the ulnar nerve runs through the cubital tunnel just behind the medial epicondyle. If inner-elbow pain comes with numbness in the pinky and ring finger or with loss of grip strength, the ulnar nerve may be compressed or irritated; treating it purely as a tendon problem with eccentrics will not help, and an orthopaedic or physical medicine specialist should assess whether the nerve needs treatment.
Putting the Data Back on the Mats
Read the pathology and epidemiology together and the place of epicondylitis in jiu-jitsu is clear: it is the long-term bill for gripping, the sport's core action. Lateral tennis elbow comes from the wrist extensors being forced into isometric wrist stabilisation whenever you squeeze; medial golfer's elbow comes from pulling and pronation repeatedly loading the common flexor tendon. Both are degenerative tendinopathy rather than inflammation, so rest and anti-inflammatories alone will not rebuild the tendon. The background figure of upper-limb injuries at 30.2% of all BJJ injuries, plus the mechanics linking grip strength closely to tennis elbow, explains why this problem is so widespread on the mats and so often allowed to become chronic.
The treatment evidence sends an equally clear message: the lever for reducing risk is not stopping training altogether but changing how much and how you grip, while loading progressively and eccentrically in the direction that hurts. Eccentric protocols like the Tyler Twist and FlexBar have randomised controlled support for improving pain, function and grip strength in lateral tennis elbow, and the medial side benefits similarly from eccentric wrist flexion and pronation; over 90% of cases recover without surgery. On that basis, most jiu-jitsu elbow pain is preventable and rebuildable, provided the practitioner is willing to adjust habits toward "short holds, frequent switches and mixing in no-gi" and to see the 6 to 12 week eccentric rebuild through, rather than going back to death-gripping the gi the moment the pain disappears.
Sources cited in this article
・Kiel J, Kaiser K. Medial Epicondylitis. In: StatPearls. Treasure Island (FL): StatPearls Publishing; 2024. NBK519000.
・Buchanan BK, Varacallo M. Lateral Epicondylitis (Tennis Elbow). In: StatPearls. Treasure Island (FL): StatPearls Publishing; 2023.
・Tyler TF, Thomas GC, Nicholas SJ, McHugh MP. Addition of isolated wrist extensor eccentric exercise to standard treatment for chronic lateral epicondylosis: a prospective randomized trial. J Shoulder Elbow Surg. 2010;19(6):917-922. PMID 20579907.
・Svernlöv B, Adolfsson L. Non-operative treatment regime including eccentric training for lateral humeral epicondylalgia. Scand J Med Sci Sports. 2001;11(6):328-334.
・Kazi F, Patil DS. Effects of the Tyler Twist Technique Versus Active Release Technique on Pain and Grip Strength in Patients With Lateral Epicondylitis. Cureus. 2023;15(10):e46799. PMID 37954758.
・Hinz M, et al. Injury Patterns, Risk Factors, and Return to Sport in Brazilian Jiu Jitsu: A Cross-sectional Survey of 1140 Athletes. Orthop J Sports Med. 2021;9(12). PMID 34988235.
References
1. Li D, Hammad A, Kaiser K. (2026). Medial Epicondylitis (Golfer's Elbow). In: StatPearls. Treasure Island (FL): StatPearls Publishing. PubMed 30085542 (source for the general-population prevalence of medial epicondylitis below 1%, 3.8% to 8.2% in high-risk occupational and athletic groups, 10% to 20% of all epicondylitis, about 75% in the dominant arm, about 20% with concurrent ulnar neuropathy, over 90% improving without surgery, and the explicit definition as degenerative tendinopathy rather than inflammation)
2. Buchanan BK, Varacallo M. (2023). Lateral Epicondylitis (Tennis Elbow). In: StatPearls. Treasure Island (FL): StatPearls Publishing. PubMed 28613744 (source for the 1% to 3% annual incidence of lateral epicondylitis, the lesion sitting at the ECRB origin under eccentric overload, and histology showing granulation tissue and microtears with a marked absence of classic inflammatory cells)
3. Tyler TF, Thomas GC, Nicholas SJ, McHugh MP. (2010). Addition of isolated wrist extensor eccentric exercise to standard treatment for chronic lateral epicondylosis: a prospective randomized trial. J Shoulder Elbow Surg;19(6):917-922. PubMed 20579907 (adding rubber-bar eccentric wrist extension to standard physical therapy improved pain by 81%, function by 76%, tenderness by 71% and strength by 79%, all significantly better than controls; the original randomised trial behind the Tyler Twist described here)
4. Kazi F, Patil DS. (2023). Effects of the Tyler Twist Technique Versus Active Release Technique on Pain and Grip Strength in Patients With Lateral Epicondylitis. Cureus;15(10):e46799. PubMed 37954758 (randomised controlled study in which post-treatment mean grip strength was 24.13 kg in the Tyler Twist group versus 21.33 kg in the active release group; the source of the grip-strength figures used here)
5. Svernlöv B, Adolfsson L. (2001). Non-operative treatment regime including eccentric training for lateral humeral epicondylalgia. Scand J Med Sci Sports;11(6):328-334. PubMed 11782264 (a non-surgical treatment programme for lateral epicondylosis centred on eccentric training, supporting the argument here that tendons need progressive mechanical loading to remodel rather than rest and anti-inflammatories alone)
6. Hinz M, Kleim BD, Berthold DP, et al. (2021). Injury Patterns, Risk Factors, and Return to Sport in Brazilian Jiu Jitsu: A Cross-sectional Survey of 1140 Athletes. Orthop J Sports Med;9(12):23259671211062568. PubMed 34988235 (upper-limb injuries accounted for 30.2% of all injuries among 1,140 BJJ athletes; the background data for upper-limb load in jiu-jitsu cited here)