What Is Grip Strength? Types, Tests & Why It Matters

Grip strength is not just hand strength. It is a measurable physical quality: the maximum force your hand and forearm can produce when gripping, pinching, or sustaining a hold. And it has turned out to be one of the most informative markers in exercise science and clinical medicine. A 140,000-person study published in The Lancet found it predicts all-cause mortality better than systolic blood pressure. A review of 94 studies linked it to reduced risk of cardiovascular disease, type 2 diabetes, depression, and cognitive decline. In athletic settings, it is the quality that separates the lifters, climbers, and grapplers who stall from those who keep progressing.

This article is for anyone whose grip has become the weak link, whether your deadlift is limited by what your fingers can hold, your climbing progress has stalled, or you have simply been doing random forearm work with no real structure. Most people do not realize they have four distinct types of grip strength, and that most grip training programs address only one of them. Here we cover all four, how to test your grip against published norms, what anatomy is actually doing the work, and why grip strength deserves deliberate training rather than benign neglect. If you want the full training system after reading this, the Grip Training Encyclopedia is the next stop.

The Four Types of Grip Strength

Grip is a shorthand for at least four mechanically distinct patterns. Each involves different muscles, different joint angles, and different functional demands. Most recreational lifters train only crushing grip, which is why they have a solid handshake and still drop bars mid-deadlift, fail plate pinches, or come apart on climbing holds. Here is what each type is, how it works, and where it shows up.

Crushing Grip

Crushing grip is the force generated when the fingers close toward the palm against resistance. It is the pattern tested by a handshake, measured by a dynamometer, and represented by hand grippers like the Captains of Crush series. The primary muscles are the flexor digitorum superficialis and flexor digitorum profundus (the long finger flexors running through the forearm), with contributions from the thumb flexors and intrinsic hand muscles.

Real-world examples include closing the hand around a loaded barbell, securing a door handle under resistance, or controlling an opponent's hand in arm wrestling. In sport, crushing grip is decisive in powerlifting (bar control on heavy deadlifts), arm wrestling (hand control and cupping), and strongman events. The standard equipment for training it: hand grippers (Captains of Crush, Heavy Grips), thick-bar deadlifts, and loading pin holds with a standard-diameter implement.

Pinching Grip

Pinching grip is the force produced by the thumb opposing the fingers, without the palm engaging in the grip. It uses a fundamentally different primary mover, the thenar muscle group at the base of the thumb, and a different mechanical pattern from crushing. This is why experienced hand gripper users often discover they cannot hold a 45 lb plate pinched between thumb and four fingers for more than a few seconds: the crushing muscles are not what pinching demands. Strong crushers get humbled by plate pinches all the time.

Real-world examples include carrying a suitcase by its rim, maintaining a hub grip in grip sport, and wrist control in BJJ or grappling. In sport, pinching is decisive in grip sport competition (hub lifts, pinch blocks), armlifting events, and any grappling context where thumb opposition is required. Primary training equipment: plate pinches (25 lb and 45 lb plates), hub attachments, and dedicated pinch blocks.

Supporting Grip

Supporting grip is isometric: the ability to sustain a hold under load for extended duration without the fingers unwinding or opening. It draws on finger flexor endurance and the resilience of the connective tissue (tendons, pulleys, and joint capsules) rather than peak force production. A set of deadlifts that ends because the fingers open before the legs give out is a failure of supporting grip, not crushing grip. The distinction matters for how you train it.

Real-world examples include farmer carries, loaded dead hangs, long-duration barbell holds, and carrying heavy bags. In sport, supporting grip is central to strongman (farmer walk, yoke, loading events), powerlifting (heavy deadlift sets), and rock climbing (route endurance). Key equipment: loading pins for hanging holds, farmer carry handles, pull-up bars for dead hangs, and chalk to remove sweat from the friction equation.

Open-Hand Grip

Open-hand grip is the least trained and least understood type, and the one most commonly missing from general grip programs. It involves the fingers generating force while partially or fully extended, rather than curled into the palm. The mechanical position changes which structures bear load: the A2 and A4 flexor tendon pulleys in the fingers take on higher stress, and the interossei muscles (the small muscles between the metacarpals) contribute significantly more than they do during crushing.

This is the grip pattern of climbing holds. Crimps, slopers, and pockets all require open-hand strength. It also appears in thick bar or axle bar lifting, where the larger diameter forces a more extended finger position and reduces the mechanical advantage that a fully curled grip provides. In sport, open-hand grip is primary in rock climbing and bouldering, and supplementary in any thick-bar strength sport. Equipment: hangboards, thick bar attachments (Fat Gripz, axle bars), and fat-grip dumbbell and cable work. Standard hand gripper work essentially ignores this pattern, which means climbers who only train with grippers are missing the majority of their sport-specific demand.

Grip Type Summary

Type	Mechanical Pattern	Real-World Example	Primary Equipment	Key Sport
Crushing	Fingers closing toward palm against resistance	Handshake, barbell hold	Hand grippers, thick-bar deadlift	Arm wrestling, powerlifting, strongman
Pinching	Thumb opposing fingers, minimal palm contact	Carrying a suitcase by the rim	Plate pinch, pinch block, hub	Grip sport, armlifting, BJJ
Supporting	Sustained isometric hold under load	Farmer carry, long deadlift set	Loading pin, farmer handles, pull-up bar	Strongman, powerlifting, climbing
Open-Hand	Fingers partially extended, generating force	Climbing crimp hold	Hangboard, axle bar, Fat Gripz	Rock climbing, general fitness

How to Test Your Grip Strength

Grip strength testing gives you an objective baseline: a number you can track over months, compare against population norms, and use to catch plateaus before they become demoralizing. The standard clinical and research tool is a hand dynamometer, which measures peak force in kilograms or pounds.

Dynamometer Protocol

Standard testing protocol: sit upright with elbow at 90 degrees, upper arm against the torso, wrist in neutral (neither flexed nor extended). Squeeze the dynamometer as hard as possible for 3–5 seconds. Perform three maximal squeezes per hand with one to two minutes of rest between attempts. Record the highest single reading or the average across three attempts. Both are used in research, so note which method you are using for consistency across retests. Test the dominant hand first.

Grip strength peaks in the 30–39 age range and declines predictably after that. That trajectory is normal and expected, and the table below reflects it.

Grip Strength Norms by Age and Gender

Age Group	Male Average (kg)	Female Average (kg)
20–29	49.2	29.5
30–39	50.1	30.1
40–49	48.3	28.7
50–59	44.5	25.9
60–69	38.6	22.4
70–79	32.1	19.3

If your score falls below average for your age and gender, treat that as useful information, not a judgment. Research consistently shows grip strength is trainable at any age. A 12-week training study in older adults produced an average 7% improvement in right-hand grip strength, which is meaningful relative to the health thresholds where risk begins to increase.

Alternative Tests

Dynamometers are the gold standard, but three other tests give useful functional data without specialized equipment:

• Timed dead hang: Hang from a pull-up bar with a shoulder-width, overhand grip until grip fails. Under 20 seconds indicates weak supporting grip. Forty to sixty seconds is a solid intermediate standard. Ninety seconds or more is strong by any general fitness measure.
• Captains of Crush gripper level: Which CoC gripper can you close cleanly, from a legal set position, for five reps? The CoC line runs from the Guide (60 lb) through the #4 (365 lb). Closing the #1 (140 lb) puts you in intermediate territory; the #2 (195 lb) marks the advanced/competitive threshold for most populations. See the Captains of Crush Progression Ladder for the full standard by level.
• Farmer carry bodyweight ratio: Load each hand with a weight equal to a target fraction of your bodyweight and carry it for 30 seconds. Half bodyweight per hand is a reasonable baseline; bodyweight per hand (total load equal to twice bodyweight) marks serious supporting grip.

Grip Strength Anatomy: What's Actually Working

You do not need to memorize anatomy to train grip effectively, but understanding which structures are doing the work, and which adapt slowly, explains why grip progress feels different from other lifts and why injuries tend to show up where they do.

Forearm Flexors

The primary engines of grip strength are the long finger flexors running through the forearm: the flexor digitorum profundus (FDP), which connects to the distal phalanges and provides the deep, high-force closing action, and the flexor digitorum superficialis (FDS), which attaches to the middle phalanges and contributes to both crushing force and finger independence. These are the muscles you feel fatiguing during a hard gripper session or a long dead hang. They respond to training like any skeletal muscle. They hypertrophy, they adapt to progressive overload, and they recover in 48–72 hours after a hard session.

Forearm Extensors

The extensor compartment on the back of the forearm does not produce grip force, but it stabilizes the wrist and counterbalances the flexors. Without adequate extensor strength and training volume, the flexor-to-extensor ratio tilts, and the result is lateral epicondylitis (tennis elbow), wrist impingement, and chronic forearm tightness. Three sets of band-resisted finger extensions at the end of every grip session is the standard prescription. It feels easy because it is working at a low load. That is appropriate, not a sign you should skip it. Skipping extensor work is one of the most common ways grip athletes end up with nagging elbow issues.

Intrinsic Hand Muscles

The small muscles inside the hand itself handle fine motor control, finger spread and compression, and thumb opposition: the interossei (between the metacarpals), the lumbricals (running alongside the finger tendons), and the thenar group (the mound of muscle at the base of the thumb). These muscles are primary in pinching grip and open-hand grip, and they adapt more slowly than the large forearm muscles. This is one reason pinch strength and open-hand strength improve more slowly than crushing: you are developing smaller muscles working in mechanically demanding positions.

Connective Tissue: Why Grip Progress Feels Slow

Tendons, pulleys, and joint capsules adapt to training at roughly one-third to one-half the rate of muscle tissue. The muscles can absorb increased training load in four to six weeks; the tendons need twelve or more. This mismatch is the mechanism behind most grip injuries: athletes increase load or volume because their muscles feel fine, then three weeks later a tendon that was silently accumulating stress makes itself known. The practical rule is to let your programming be governed by what the tendons can absorb, not what the muscles can handle. Adding more sets this week is almost never the right call if you are already training consistently.

A2 and A4 Pulleys for Climbers

Rock climbers should know the A2 and A4 pulleys by name. These are fibrous rings that hold the finger flexor tendons against the bones as the fingers flex. In the closed-crimp position (fully curled fingers), the A2 pulley bears extreme load, and it is the structure most commonly injured in climbing. Open-hand grip training reduces load on the A2 pulley while developing the pattern that transfers to most real climbing holds. Extensor training (band opens) maintains pulley health by balancing the chronic flexor loading of climbing-specific grip work.

Why Grip Strength Matters Beyond the Gym

Grip strength was long treated as a training accessory: useful for lifters, largely irrelevant to health. The research over the past decade has substantially changed that picture.

Grip as a Health Biomarker

The most cited study in this area is the Leong et al. 2015 PURE study, published in The Lancet and conducted across 17 countries with over 140,000 adult participants. The finding that got attention: grip strength was a stronger predictor of all-cause mortality and cardiovascular mortality than systolic blood pressure. Every 5 kg decrease in grip strength was associated with increased risk of cardiovascular disease, myocardial infarction, and stroke.

The lowest quintile (the bottom 20% of grip strength for age and gender) showed approximately a two-fold higher hazard for all-cause mortality compared to the highest quintile. That is a large effect for a single measurement taken in a few seconds.

A subsequent review of 94 studies reinforced and expanded this: higher grip strength was consistently associated with lower risk of cardiovascular disease, type 2 diabetes, musculoskeletal impairment, disability, depression, and cognitive decline. There is also specific evidence for women: those aged 40–69 with grip strength below 24.3 lbs showed a 61% higher risk of breast cancer mortality. Grip strength does not cause these outcomes. It is a proxy for overall musculoskeletal reserve, which tracks with health broadly, but it is an unusually accessible and informative proxy.

Grip for Daily Function

Below the population-level data is the everyday case for grip strength: opening jars, managing a dog leash, carrying groceries from the car in one trip, using hand tools for more than a few minutes without forearm fatigue, turning a stiff door handle. These feel trivial until grip strength declines, which typically happens gradually enough that the drop goes unnoticed until functional limitations become hard to ignore.

In clinical rehabilitation, grip strength recovery is a primary benchmark after stroke, hand surgery, and upper extremity injury. Surgeons and physical therapists measure it specifically because it reflects the integrated function of the hand, wrist, and forearm as a system, not just the strength of individual muscles. The fact that it is easily measured and objectively tracked makes it the standard outcome metric in functional recovery programs.

Grip for Athletic Performance

In the gym and in competition, grip strength functions as a hard ceiling on performance in any activity that requires holding, controlling, or moving an external load. Deadlifts stop when fingers open. Pull-up volume ends when the bar rolls out of the hand. Climbing routes end when the hold slips. Grappling exchanges resolve in favor of whoever maintains grip position longer.

Grip strength training has direct transfer to deadlifts, pull-ups, rows, farmer carries, arm wrestling, rock climbing, and grappling. Not because grip training replaces sport-specific practice, but because it removes the bottleneck that keeps athletes from expressing the strength they have already built everywhere else. For the full breakdown of sport-specific grip demands and how to train for each, the Grip Training Encyclopedia covers arm wrestling, climbing, powerlifting, strongman, and BJJ in dedicated sections. The dedicated arm wrestling grip training program is the most complete example of sport-specific grip programming on the site.

How to Start Training Your Grip

The goal of this section is not to give you a full program; the Grip Training Encyclopedia and the Periodized Grip Training guide handle that. The goal is to give you three practical entry points that address different grip types and are sustainable to add to an existing training schedule without injury risk.

1. Pick up a CoC Trainer or Sport gripper and use it three times per week. For most people new to dedicated grip training, the CoC Trainer (100 lb) or Sport (80 lb) is the right working resistance: enough to produce a training stimulus, not so much that form breaks down or tendons accumulate stress too fast. Three sessions per week, four sets of 8–10 clean closes from a legal set position, two minutes of rest between sets. This addresses crushing grip directly. Find grippers in the hand grippers collection.
2. Add two sets of dead hangs to the end of your pull day. Hang from a pull-up bar with a shoulder-width overhand grip. Hold until grip fatigue reaches about a 6 on a 10-point effort scale, and stop before failure to protect the tendons while they adapt. Start at 20–30 seconds per set if you are new to hangs. This addresses supporting grip, costs nothing if you have a pull-up bar, and stacks onto training you are already doing.
3. Do two sets of plate pinches twice per week for thumb strength. Pinch two 25 lb plates together (smooth sides facing out) and hold for 8–10 seconds per set. When 25 lb plates become easy, move to a single 45 lb plate. This addresses pinching grip, which almost no general training programs touch. If you want a more loadable option, a pinch block from the grip tools collection lets you add weight incrementally rather than jumping between plate sizes.

These three recommendations cover three of the four grip types (crushing, supporting, pinching). Open-hand grip is the specialist category. If you climb or want to develop it specifically, the Encyclopedia covers hangboard programming and thick bar work. Wrist stability work and extensor training (band opens around the fingers, two sets of 20 after every session) should accompany any grip program to maintain flexor-extensor balance. The wrist trainer collection has tools for both.

Frequently Asked Questions

What is a good grip strength for my age?

The norms table above gives average values by age and gender measured by dynamometer. For men in their 30s, average is around 50 kg (110 lb); for women in the same age range, around 30 kg (66 lb). "Good" depends on your goal. Average is a reasonable starting target if you are currently below it, but for athletes or people using grip as a performance tool, the CoC gripper benchmarks and dead hang standards in the testing section are more specific to trained populations.

Is grip strength genetic or trainable?

Both, but trainability is the more actionable part. There is a genetic component to grip strength: hand size, tendon insertion angles, and muscle fiber type ratios all have heritable elements. But research consistently shows grip strength responds to training at any age. The 12-week older adult study that produced a 7% average improvement is one example; the broader evidence base for strength training shows that even populations who start at low levels can make meaningful gains with consistent progressive overload. Genetics sets a ceiling, but most people are nowhere near it.

Can grip strength predict health problems?

It is more accurate to say grip strength is correlated with health outcomes. It predicts risk, not causation. The Leong et al. 2015 PURE study found it predicts cardiovascular mortality better than systolic blood pressure across 17 countries and 140,000 adults. Lower grip strength is associated with higher risk of CVD, stroke, type 2 diabetes, depression, and cognitive decline in large-scale reviews. The mechanism is likely that grip strength reflects overall musculoskeletal reserve and physical capacity, a whole-body health indicator compressed into a hand measurement. If your grip strength is low, that is useful information worth acting on, not a diagnosis.

What's the difference between crushing grip and pinching grip?

Crushing grip closes the fingers toward the palm: the handshake, the barbell hold, the hand gripper. The primary movers are the long finger flexors running through the forearm. Pinching grip opposes the thumb against the fingers without the palm closing: the plate pinch, the hub hold, the suitcase-rim carry. The primary movers are the thenar muscles at the base of the thumb. These are different muscle groups in different positions, which is why training one does not automatically develop the other. A strong crusher who has never trained pinching will often be surprised at how quickly a plate slips out of their thumb.

How often should I test my grip strength?

Testing every four to six weeks is enough to track meaningful progress without wasting sessions on assessment. More frequent testing does not produce more information; grip strength changes slowly enough that weekly tests mostly measure day-to-day variability rather than real adaptation. Test at the same time of day, after a brief warm-up, and at the beginning of a session before fatigue accumulates. Retesting after a deload week, when fatigue has cleared, typically shows the best numbers and gives the most accurate picture of true strength gains.

Where to Go from Here

This article is the foundation. If you want to go deeper on any part of it, here is where each thread continues:

• Full training system: The Grip Training Encyclopedia covers equipment, programming, all four grip types in detail, sport-specific applications, common mistakes, and benchmarks in one structured resource. Read this before anything else if you are building a grip training program from scratch.
• Structured programming: The Periodized Grip Training guide translates the principles above into an 8–12 week program with specific loading, deload protocols, and progression targets.
• Sport-specific training: The Arm Wrestling Grip Training Program is the most complete model on the site for sport-specific grip programming, and it covers patterns that transfer to other grappling sports as well.
• Gripper progression: The Captains of Crush Progression Ladder maps out the full CoC line with standards, training methods, and realistic timelines for each gripper level.
• Choosing your first gripper: Choosing the Right Gripper Resistance Level covers the two-gripper rule and a no-equipment self-assessment.
• Equipment: The hand grippers, grip tools, and wrist trainer collections cover grippers, loading pins, pinch blocks, thick bar tools, and forearm stability equipment.