There is a moment that most strength athletes recognise. The bar is loaded, the setup is right, the legs and back have more in the tank — and the hands give out first. The lift ends not because the primary movers failed but because the connection between the athlete and the bar failed. Grip is the limiting factor, and it has been quietly limiting things for longer than most people realise.
Grip strength is one of the most undertrained physical qualities in strength sports, despite being one of the most measurable predictors of overall strength, longevity, and athletic performance. Research published in the Journal of Strength and Conditioning Research consistently links grip strength to upper body pulling strength, deadlift performance, and — in broader population studies — to all-cause mortality. This is not a fringe finding. Grip strength is a proxy for systemic physical capacity in a way that almost no other single measurement is.
This guide covers what grip strength actually is, why it matters more than most training programmes account for, how to train it intelligently, and what tools actually work.
What grip strength actually means
Grip strength is not one thing. It breaks into several distinct capacities that each require specific training.
Crushing strength is what most people think of when they think of grip — the ability to close the hand with maximal force against resistance. This is what hand grippers train, what determines whether you hold a deadlift at the top, and what gives out first on a heavy barbell row when fatigue accumulates.
Supporting strength is the ability to maintain a fixed grip position over time without active crushing. Farmer's carries, loaded holds, and any movement where you're simply maintaining contact with the implement under sustained load train this capacity. It is distinct from crushing strength and requires its own training stimulus.
Pinch strength involves the thumb and the pad of the fingers working against each other — holding a weight plate by the rim, using a hub loader, or any grip that doesn't involve wrapping the fingers around a handle. Notoriously undertrained, disproportionately important for odd-object lifting and for anyone who competes in strongman or grip sport.
Extension strength — the capacity of the hand and finger extensors — is almost universally ignored. Every gripper, every deadlift, every pulling movement trains the flexors. The extensors, which open the hand and oppose the flexors, are rarely if ever specifically trained. This imbalance is one of the primary contributors to elbow pain, forearm tendinopathy, and carpal tunnel symptoms in strength athletes. Training the extensors is not optional for anyone who trains the flexors heavily. It is injury prevention in the most direct sense.
Why grip fails when it shouldn't
The grip often fails before the primary movers for one of three reasons.
The first is simple underdevelopment. Most strength programmes contain zero specific grip training. The grip is expected to keep up with the deadlift, the row, and the carry without ever being directly trained — and it doesn't. The primary movers develop faster than the grip because they receive direct training stimulus and the grip does not.
The second is fatigue accumulation. Even when grip strength is adequate at the start of a session, it degrades faster than the larger muscle groups under repeated loading. By the third or fourth working set of heavy deadlifts, the grip may be significantly more fatigued than the posterior chain — which means the lift ends because of accumulated fatigue in the hand rather than genuine failure of the primary movers.
The third is technique. The way a bar is gripped — the exact position of the bar in the hand relative to the fingers and the palm, the involvement of the thumb, the tension applied before the lift begins — affects how efficiently force transfers from the hand to the bar. Poor grip technique wastes crushing strength that is already present.
The tools that actually develop grip strength
The Captains of Crush range is the standard reference point for serious grip training. Eleven levels from the Guide at 27kg to the No. 4 at 165kg — a closing force that fewer than five people have officially achieved in the history of the gripper. The No. 3 at 126kg is the most widely recognised benchmark in grip sport: closing it places you in a genuinely elite tier of grip strength by any standard. The No. 2 at 88kg is where most dedicated strength athletes set their first serious target.
The range works because the progression is real. Each level provides a meaningful resistance increase over the previous, and the engineering — IronMind's torsion spring and aluminium handles — is consistent enough that progress on one level genuinely predicts readiness for the next. This is not true of generic grippers, which vary wildly in resistance and lose tension quickly.
For most strength athletes: start with the Trainer (45kg) or No. 1 (63kg) and work toward closing the No. 2 (88kg) as the first meaningful benchmark. Lifters with existing grip development should test themselves on the No. 2 first. If it closes comfortably, move to the No. 2.5 or No. 3.
Knurled stainless steel handles with a black finish, five resistance levels from 45kg to 136kg. The knurling is the key practical detail — it prevents the gripper from rotating in the palm during a set, which is both more effective for training and eliminates one of the common comfort complaints with smooth-handled grippers. For daily grip training at a price that allows buying multiple resistance levels simultaneously, the SS Black Grippers are the practical workhorse.
One of the most effective and underused grip tools available. Thick Grips slide onto any Olympic barbell and increase the handle diameter from the standard 28–29mm to 50mm — transforming every pulling movement in your programme into grip training simultaneously. Deadlifts, barbell rows, curls, Romanian deadlifts: all of them become forearm and grip development without changing a single rep or adding a single minute to the session.
The physiological logic is sound: a thicker bar recruits more motor units in the hand and forearm because the larger circumference requires the hand to apply force across a greater surface area. Thick bar training is a staple of elite powerlifters, strongman athletes, and anyone who has trained grip seriously for long enough to run out of obvious improvements.
At 5cm diameter and 12.5cm length, they fit any standard 28mm barbell sleeve and are sold as a pair. The knurled surface on the current version prevents the grip from slipping under load.
The most neglected tool in grip training — and the one with arguably the highest return on investment for athletes already training the flexors heavily.
The Expand-Your-Hand Bands are placed around the fingers and thumb, and the hand opens against their resistance — training the extensors rather than the flexors. Set of 10 bands across five resistance levels, colour-coded, latex-free and non-petroleum-based material that is UV and ozone resistant.
The case for extensor training is direct: if you're closing grippers, doing heavy deadlifts, and loading carries, your flexors are receiving substantial training stimulus. Your extensors are receiving none. The resulting strength imbalance loads the elbow joint asymmetrically and is one of the most reliable pathways to medial elbow pain, golfer's elbow, and overuse tendinopathy in strength athletes. Two minutes of extensor work per session — before or after grip training — provides meaningful balance and has documented effects on elbow pain reduction in clinical settings.
This is the tool most grip-training articles don't mention. It should be in every serious training bag.
How to programme grip training
The most common mistake is treating grip training as an afterthought — a few gripper closes tacked on at the end of a session when everything else is already done and fatigue is highest. This produces some adaptation but is far from optimal.
For general strength athletes
Add specific grip work 2–3 times per week, ideally on the same days as pulling movements. The grip is already partially warmed up from deadlifts and rows, and adding gripper work after the main session extends the stimulus without requiring a separate warmup. Start with one or two resistance levels below your maximum close — the level you can close for 5–8 reps with good control — and work accumulation sets of 3–5 reps with full closes before moving to heavier resistance.
Thick Grips can be used on all pulling movements year-round without additional programming complexity. Simply swap them in on barbell rows, deadlifts, or accessory work and the grip stimulus is built into the session automatically.
For powerlifters and deadlift-focused athletes
Grip failure in powerlifting is most common at competition-level loads or during high-fatigue training blocks. The most effective intervention is a combination of supporting strength work — loaded holds with competition-weight or near-competition-weight deadlift holds at the top — and crushing strength development through gripper training in the 85–95% range.
One effective protocol: after the final deadlift working set, load the bar to competition weight or slightly above and hold for 10–30 seconds. Three to four rounds. This overloads the supporting strength capacity specifically at the loads where it matters most. Pair with twice-weekly gripper work and Thick Grips on accessory rows.
For strongman and grip sport athletes
All four tools become relevant simultaneously. Crushing strength via Captains of Crush across multiple resistance levels. Supporting strength via loaded holds and farmer's carry. Thick Grips on all barbell work. Extensor work with Expand-Your-Hand Bands as a mandatory part of every grip session to maintain balance and prevent injury at training volumes that most general strength athletes don't approach.
The progression question: which gripper to start with
This is the question most people get wrong in both directions — either starting too light (which produces adaptation but not the kind that transfers to meaningful real-world grip) or too heavy (which produces failed reps with poor technique and no useful stimulus).
The correct starting point is the highest resistance level you can close for three to five complete, controlled reps with a full close — handles touching — and no cheating of position. If you're unsure, the No. 1 (63kg CoC or equivalent) is a reliable starting point for most people who have been lifting for a year or more.
From there, progress within a level before moving to the next: once you can close the current gripper for 3 sets of 8 reps with full control, add the next resistance level to the session. Don't discard the previous level — it becomes your warm-up tool and your volume work.
The extensor balance point
A practical rule that experienced grip athletes use: for every set of flexor work — gripper closes, deadlifts, rows — do one set of extensor work with the Expand-Your-Hand Bands. This is not a rigid formula, but the ratio captures the intent: the extensors should not be receiving dramatically less training volume than the flexors if you want to avoid the chronic elbow and forearm issues that accumulate over years of one-sided training.
Grip strength and longevity
It is worth addressing the research directly. A 2015 study in The Lancet involving 139,000 participants across 17 countries found grip strength to be a stronger predictor of cardiovascular mortality than systolic blood pressure. A 2019 systematic review in the British Medical Journal linked low grip strength to higher risks of all-cause mortality, cardiovascular disease, and disability. These findings are not proving that grip training extends life — the causal direction is complex — but they do confirm that grip strength is a genuine marker of physical capacity that tracks with health outcomes in ways that most isolated strength measurements do not.
For strength athletes, the practical implication is simpler: grip is not a detail. It is a trainable quality that responds to specific stimulus, limits performance in the primary lifts when undertrained, and connects to systemic physical capacity in ways that justify direct, consistent training.
FAQ
Will using straps undermine my grip development?
Straps used strategically do not harm grip development, provided specific grip training is also present in the programme. Where straps become counterproductive is when they are used as a permanent substitute for developing the grip — allowing the primary movers to continue progressing while the grip stagnates. A workable approach: train with straps on sets where grip failure would otherwise terminate a productive set, and train without straps on lighter working sets and specific grip work.
How quickly does grip strength improve with specific training?
Measurable improvements in crushing grip typically appear within 4–6 weeks of consistent, specific training two to three times per week. Supporting strength improvements take somewhat longer to manifest in performance terms. The extensor adaptations from band work appear faster — many athletes report meaningful changes in elbow comfort within 2–3 weeks.
Is there a difference between double overhand and mixed grip for deadlifts?
Yes — a significant one. Double overhand is the harder grip and the one that develops grip strength directly. Mixed grip (one hand supinated, one pronated) allows heavier loads to be held without grip being the limiting factor but does not train the grip in the same way. For grip development, prioritise double overhand in training and reserve mixed grip for near-maximal or maximal efforts.
Do I need both CoC grippers and SS Black Grippers?
Not necessarily. The Captains of Crush offer a wider range of resistance levels and are the reference standard for progress tracking. The SS Black Grippers are a more economical option for daily training volume. Many athletes use one or two CoC grippers for progression tracking and testing, and Black Grippers for high-volume daily work.
When should I add Thick Grips to my programme?
Immediately. There is no prerequisite grip development level required to benefit from thick bar training. The stimulus is proportionally appropriate at any strength level — a lighter load on a thick bar still recruits more hand and forearm musculature than the same load on a standard bar.
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