Relaxed grip means holding each handhold only as hard as you need to stay on, with your feet and body position carrying your weight. Squeezing harder than that, or never letting go, pumps your forearms sooner. The other half of the skill is resting: finding good stances on the route and shaking out one arm at a time. The app can't measure grip force or see your fingers; it reads body positions, such as straight-arm rests and an arm hanging down to shake out.
Grip only as hard as needed
Set your feet and hips first so your legs carry your weight. Then hold the handhold only as hard as you need to stay on. Squeezing harder than that is over-gripping, and it tires your forearms faster.
weight in your feet, hands just secure.
Don't keep a nonstop squeeze. A steady grip drains oxygen from the forearm muscles, and in lab tests climbers' forearms recovered oxygen even in 3-second pauses between grips. Ease off your hand whenever your feet are taking the weight.
squeeze to move, soften to stand.
Choose the gentlest grip the hold allows. Open hand (finger joints only slightly bent) or half crimp (middle finger joints bent to about 90 degrees, fingertip joints straight) are your defaults. Save the full crimp (thumb pressing down on the index fingertip, fingertip joints bent backward) for small edges where nothing else works: it puts the most strain on the finger pulleys.
fingers draped over the hold, not clawed.
Find a rest, straight arm
Look at the route before you start. Work out where the hard sections are and where the good holds and footholds are, so you know where you will rest.
a plan of where to stop.
Rest on a good hold with good feet, before you are fully pumped. Don't hang around on the hardest moves just because the holds are small. That pumps you out. Climb through, then rest where it's comfortable.
stopping because you chose to, not because you had to.
On vertical and steeper ground, hang on a straight arm at a rest. Your skeleton then takes the strain instead of your muscles. Bend your arms to move, not to wait.
hanging from the shoulder, elbow long.
On a slab or an easy vertical wall, stand tall on your feet at a rest instead of sinking low on a straight arm. Standing tall puts more of your weight through your feet. Sinking low made the forearm muscles work harder at every wall angle tested.
standing on your legs, hand barely holding.
Shake out, scan ahead
At the rest, take one hand off. Let that arm hang straight down by your side and shake the hand and forearm loosely. In a lab study, shaking the forearm beside the body between grips gave longer endurance and faster forearm re-oxygenation than keeping the hand up on the hold.
a loose, dangling arm.
Put that hand back, then shake out the other arm the same way. Keep your feet weighted and your body still while you do it.
one hand holding lightly, the other shaking.
Give the rest some time. Forearm recovery is slower in less-trained climbers: in one study, intermediate climbers took around 47 seconds to recover half their forearm oxygen after a hang, elite climbers about 8. While you shake, read the next moves and spot the next rest.
breathing slows, eyes on the next section.
Between hard attempts, rest off the wall. In a lab study, walking between exhausting grip tests kept finger performance better than easy climbing or hanging did.
Stay safe
Warm up before you climb: raise your pulse, rotate your joints, then do some easy climbing. Skipping the warm-up is a listed risk factor for finger pulley injuries.
warm and loose before the first hard hold.
If a foot slips while you are on small holds, let go rather than catching yourself on your fingers. A sudden load on bent fingers, especially in a full crimp, is the classic way finger pulleys tear. Only do this where a fall is safe: above a pad or on a rope.
Feel it
Your feet carry you and your hands feel light. Your grip tightens for a move and softens again as soon as you are standing. Rests come where you planned them, on a straight arm on steep ground or standing tall on a slab, and a shaken-out arm feels loose and heavy before you reach up again. If your forearms are burning on easy ground, you are probably squeezing too hard or not using your feet.
Fix-its
- You death-grip every hold Get your feet and hips set first, then hold only as hard as you need to stay on. Soften your hand every time your feet take the weight.
- You rest on the hardest moves, or not at all Plan rests before you start. Climb through the hard section and rest on good holds with good feet, before you're fully pumped.
- You rest with bent arms On steep ground, hang on a straight arm. On a slab or easy vertical wall, stand tall on your feet instead of crouching on your arms.
- Your hand stays on the hold while you 'rest' Take the hand off, let the arm hang straight down by your side and shake it loose, then swap arms.
- You full-crimp everything Use an open hand or half crimp wherever the hold allows. Keep the thumb-locked full crimp for small edges with no other option.
Drill
- Light-hands traverse: after your warm-up, traverse low on big holds and keep easing your grip while your feet take the weight. 2-3 traverses.
- Open-hand traverse: on easy holds, use only an open hand or half crimp, no thumb pressing on the fingertips. 2-3 traverses.
- Straight-arm repeat: pick an easy route you know that pumps you, and climb it again without bending your arms except to move. Notice whether you finish less pumped.
- Planned rests: before an easy route, pick 2-3 rest spots from the ground. At each one, hang one arm straight down and shake it, then the other.
- Film it: set the phone 3-5 m behind you, level with mid-route. Check that your resting arm is straight on steep ground and that each shake-out arm hangs straight down by your side.
Sources
- Mountaineering Ireland — FUNdamentals of Climbing workshop guidance notes (2014)
- BMC — How to climb 6a: 10 expert tips
- Philadelphia Rock Gyms (Dave Rowland) — What is straight-arming and why every climber should do it (2022)
- Bonelli, Rampichini, Esposito, Rossi, Colombo, Limonta — Climber's muscle excitation and force distribution at different wall angles and body positions, European Journal of Applied Physiology (2025)
- Baláš, Michailov, Giles, Kodejška, Panáčková, Fryer — Active recovery of the finger flexors enhances intermittent handgrip performance in rock climbers, European Journal of Sport Science (2016)
- Fryer, Stoner, Dickson, Draper et al. — Oxygen recovery kinetics in the forearm flexors of multiple ability groups of rock climbers, Journal of Strength and Conditioning Research (2015)
- Philippe, Wegst, Müller, Raschner, Burtscher — Climbing-specific finger flexor performance and forearm muscle oxygenation in elite male and female sport climbers, European Journal of Applied Physiology (2012)
- Krupková, Tufano, Baláš — Optimizing active recovery strategies for finger flexor fatigue, Frontiers in Sports and Active Living (2024)
- Schweizer — Biomechanical properties of the crimp grip position in rock climbers, Journal of Biomechanics (2001)
- Vigouroux, Quaine, Labarre-Vila, Moutet — Estimation of finger muscle tendon tensions and pulley forces during specific sport-climbing grip techniques, Journal of Biomechanics (2006)
- Bosco et al. — Closed flexor pulley injuries: a literature review and current practice, Journal of Orthopaedics (2022)
- AMSSM Sports Medicine Reference (Jonathan Leung, MD) — Rock Climbing Injuries Basics (2022)
Last checked 2026-10-26.