Injury prevention: protecting fingers at every age
Most finger injuries come from load the finger isn't ready for: too hard, too sudden, too often. Warming up, choosing the grip, using your feet and listening to pain cut that load. For growing climbers there are extra rules.
In plain words
Fingers adapt to climbing, but more slowly than muscles get stronger, so it's easy to ask more of them than they can take. Prevention is mostly about how you load them. Warm up before small holds. Use the gentlest grip that works. Let your feet carry weight. Build up hard climbing gradually, and treat pain as a stop sign. Young climbers have a different weak point, the growth plate, so they need extra care: no campus boards, no added weight, and no climbing through finger pain.
Memory hookWarm, open, feet, gradual, and pain means stop.
Five habits that lower finger load
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Warm up before small holdsWarm
Easy climbing on big holds first, then gradually smaller holds and harder moves.
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Use the gentlest grip that worksGrip
Open hand or half crimp on most holds; keep full crimps for when nothing else works.
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Let the feet take weightFeet
Precise footwork and hips over the feet mean less load on the fingers.
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Build up graduallyBuild
Add hard climbing a little at a time, with easier days and rest days in between.
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Pain means stopStop
Sudden pain, a pop, or pain that lasts or keeps coming back: stop and get it checked.
For growing climbers: extra rules
Campus board work, especially double dynos, is a named risk factor for growth-plate fractures. AOSSM: none until 18 or until the growth plates close.
Don't add weight to the body for finger training while growing.
Teach open hand and half crimp; avoid dynamic moves onto crimps.
Pain at the back of the middle finger joint needs a doctor, even if an X-ray looks normal.
Mix styles and hold types instead of long sessions on small edges.
Why young fingers are different is shown step by step, with an animation, on Growth plates.
Adults: the pulley is the usual weak point
In adults the pulleys usually give way first, typically under crimping and sudden loads such as a foot slipping. Open-hand grips put far less load on the A2 pulley than crimps (see grip positions).
The evidence
- Measured A warm-up increased bowstringing of the flexor tendon over the A2 pulley by 0.6 mm (30 %) in the crimp position. Schweizer 2001: 16 fingers of 4 adults. J Biomech 34(2):217–223. The study measured the change; it didn't test whether warming up prevents injury.
- Measured A biomechanical finger model estimated A2 pulley forces 36 times lower in a slope (open) grip than in a crimp. Vigouroux et al. 2006. J Biomech 39(14):2583–2592.
- Measured Pulley injuries are the most common overuse injury in climbers, with the crimp grip as the mechanism. A proper warm-up is thought to help prevent them. Miro et al. 2021, a review. Wilderness Environ Med 32(2):247–258.
- Measured For youth climbers: no double-dyno campus board training until 18, no added weight on campus boards, limit bouldering with excessive crimping, and stop and see a professional for finger pain lasting more than 24 hours or recurring for more than a week. AOSSM STOP Sports Injuries climbing sheet, reviewed September 2025. sportsmed.org/rock-climbing.
- Measured The BMC guide advises avoiding full crimps where possible, avoiding dynamic moves onto crimps, and using good footwork, and names campus boards as a likely cause of growth-plate injuries. BMC growth plate guide, v1.0, February 2024.
- Coaching practice The warm-up order, gradual build-up and rest days above are common practice. We found no single study that tested them as a package.
Try it
Common mistakes
give the fingers a gradual warm-up first.
it's the grip with the highest pulley load.
pain is information, not something to push through.
campus boards and added weight are named risk factors for growing fingers.
every bit of weight on the feet is weight off the fingers.