Pinch strength is its own thing. Your hangboard doesn't train it. Your crimp sessions don't develop it. And ignoring it doesn't make the pinch on your project go away.

The thumb does roughly half the work on a true vertical pinch. Your other four fingers share the rest. That's a completely different force distribution than crimping, where your thumb is either locked over the top or not involved at all.

Why Your Hangboard Isn't Enough

When you deadhang, gravity pulls your body down and your fingers resist by hooking over an edge. The thumb is barely involved. You could tape it to your palm and your max hang numbers wouldn't change much.

Pinching is a squeeze, not a hook. You're generating force inward from both sides, thumb pressing against fingers, to create friction on the hold. The muscles that drive this live in the base of your palm and along the thumb side of your forearm. They don't get meaningfully loaded during hangboard work.

This is why climbers with huge crimp numbers sometimes flail on pinch-heavy boulders. The strength just isn't there, and no amount of crimping will build it.

Pinches Aren't All the Same

Before you start training, it helps to understand that "pinch" covers a wide range of grip positions. Each one loads the hand differently.

Width matters most. A narrow pinch (under 50mm) demands more from the muscles that curl the tip of your thumb. Your fingers will probably sit in a half-crimp position. A wide pinch (over 80mm) shifts load onto the muscles that spread and stabilize the thumb, and opens the hand into more of a drag position. Medium (60-75mm) is the all-rounder. Most gym pinches and a lot of outdoor pinches fall here.

Depth changes the game too. A shallow pinch where you only get one pad of contact is a different beast than a deep pinch where you can wrap two or three finger segments around it. Shallow pinches are more friction-dependent and require precise thumb placement. Deep pinches let you generate more force but demand more from the wrist.

Orientation adds another variable. Vertical pinches on a steep wall require you to squeeze inward with equal force on both sides. Diagonal or angled pinches shift the balance. Sometimes your fingers are doing more, sometimes the thumb is. Outdoor rock rarely gives you a perfectly vertical pinch, so training in a single orientation limits your carryover.

If you only train one width, one depth, and one orientation, you're training one pinch. You need variety.

The Pinch Block Lift

This is the most effective way to build raw pinch force. Same concept as a no-hang edge lift, but for the thumb.

You grip a block between your thumb and fingers, attach weight via a loading pin or sling, and lift. The weight either comes off the ground or it doesn't. Easy to track. Easy to progress.

Why blocks beat hangboard pinches: When you deadhang from pinch holds mounted on a board, your wrist bends awkwardly under load. Do this repeatedly at high intensity and you're asking for thumb tendon inflammation at the wrist. That's a common overuse injury and it can sideline you for weeks. Block lifts keep your arm at your side, wrist neutral, and the load goes straight through the grip without wrist strain. Safer position, especially when the weight gets heavy.

Block lifts also let you isolate the squeeze. On a hangboard pinch, you can cheat by pressing outward on the holds and generating force through compression rather than actual thumb opposition. With a block, you're either squeezing hard enough or the block slips.

Finding Your Baseline

Before you start a protocol, you need to know where you are. Dedicate a session to finding your max on a single pinch width. Rest at least 24 hours beforehand.

Start light and work up in small increments. Each lift should be 7 seconds, one hand at a time. Rest 30 seconds between hands and 3 minutes between weight increases. You're looking for the heaviest load you can hold for a clean 7-second lift with good form. Cap it at 7 attempts per hand. Beyond that, fatigue starts corrupting your numbers.

Test both hands. Your dominant hand will probably be stronger. That's fine. Record both numbers. You'll program off the weaker hand if training bilaterally, or train each hand at its own load.

A Protocol That Works

This is a max strength approach. It builds the kind of pinch force that shows up when you need to latch a single hard move on a boulder, not endurance for 40 moves of moderate pinching.

Frequency: 2 sessions per week, with at least 48 hours between sessions. You can run this alongside your regular climbing and finger training. Just don't stack it on a day where you've already hammered your forearms.

Warm-up: 3-4 sets of light lifts at increasing weight, 10 seconds each. Get to about 70% of your max before starting work sets.

Work sets: 3-5 sets per hand. Each lift is 7-10 seconds at 85-90% of your tested max. Rest 3 minutes between sets. If you're doing both hands alternately, the opposite hand's set counts as partial rest, but still take the full 3 minutes per hand.

Progression: When you can complete all sets cleanly (no form breakdown, no slipping), add 1-2kg next session. Retest your max every 4 weeks.

Cycle length: 4-6 weeks, then take a deload week where you drop to 2 sets at 70% before either retesting or starting another cycle.

Width Progression

Start with whatever width feels most natural for your hand size. For most people that's a medium block around 50-60mm. Build strength there first. Once you've got a solid base (4-6 weeks), introduce a second width. If your projects have narrow pinches, go narrower. If you're climbing on tufas or wide features, go wider.

Don't try to train three widths at once. Two is plenty. Rotate which one gets the primary focus each cycle.

What About On-the-Wall Pinch Training?

Block lifts build the raw force. But you also need to apply that force while climbing. That means body position, foot placement, and the ability to pinch while moving through other holds.

Steep board climbing is the best supplement here. Anything over 40 degrees forces you to squeeze pinches rather than just lay on them. If your gym has a system board or spray wall with pinch sets, spend time on them. The goal isn't to do laps. It's to find moves where the pinch is the limiting factor and work those positions specifically.

One technique worth practicing: get side-on to the pinch using a layback position instead of squaring up to it. This shifts some of the load from your thumb to your fingers and lets your body position do more of the work. On real rock, this is often the difference between holding a pinch and not.

Common Mistakes

Only training one width. You get strong at the width you train. A 60mm block won't prepare you for the 30mm micro-pinch on your outdoor project. Vary it.

Lifting with the back. Same issue as no-hang edge lifts. Squat down, keep your back straight, lift with your legs. Your fingers hold the weight. Your legs move it off the ground.

Ignoring the wrist. Pinch training loads the wrist differently than crimp training. If your wrist starts talking to you, especially on the thumb side, back off and let it recover. Wrist issues from pinch training are real and worth respecting.

Skipping the thumb in warmups. Most climbers warm up their crimp before a session but never warm up their pinch. If you're going to train pinch, spend 5 minutes with light block lifts before loading up.

Where It Shows Up

Indoor bouldering is increasingly pinch-heavy. Routesetters love pinches because they create positions that reward body tension and precise foot placement. Outdoors, natural pinches show up more than you think. Aretes, crystals, tufas, constrictions, even thumb catches on otherwise crimp-dominant holds. Getting strong on pinches doesn't just help on pinch problems. It helps everywhere your thumb touches rock.

There's also a carryover between pinch strength and sloper ability. Most slopers benefit from at least some thumb engagement, even when it's not an obvious pinch. Stronger thumb, better slopers.

The Short Version

Your hangboard trains crimps. Your pinch block trains pinches. They're different grips driven by different muscles, and one doesn't build the other. If you've never specifically trained pinch, you're probably weaker than you need to be. A 4-6 week cycle of block lifts twice a week will show you exactly how much you've been leaving on the table.

Get a block. Find your max. Train at 85-90%. Add weight when you see improvements. Vary the width over time.

Your thumb is half the grip. Train it like it matters.