Finger pulley injuries: what climbers should know

If you climb for long enough, you will meet someone who has hurt a finger pulley. Pulley injuries are among the most common climbing-specific injuries, and much of what we know about them comes from the work of Volker Schöffl and colleagues, who have studied climbing injuries for many years. This post explains what pulleys are, why they get injured and when to get help.

Important: this is general information, not medical advice. If you think you have injured a finger, see a doctor or a physiotherapist with experience in climbing injuries. Only a qualified professional can assess your finger and advise on treatment.

What are pulleys?

The tendons that bend your fingers run along the palm side of each finger. To stop them lifting away from the bone when you grip, they pass under a series of fibrous bands called pulleys. They work much like the guides on a fishing rod that keep the line close to the rod.

Each finger has several annular pulleys, named A1 to A5. The A2 pulley, near the base of the finger, and the A4 pulley, in the middle section, are the ones climbers most often injure. The ring and middle fingers are commonly affected.

Why climbers injure them

Pulleys are loaded hardest when the finger is sharply bent at the middle joint while the end joint is straight or hyperextended. That is the crimp position. In a full crimp, the tendons pull strongly against the pulleys.

Situations often linked to pulley injuries include:

• Hard crimping on small edges, especially when a foot slips and load suddenly increases.
• Dynamic catches on small holds.
• Climbing or hangboarding hard while tired or poorly warmed up.
• Rapid increases in the amount of hard finger training.
• Young climbers training fingers intensely before they are physically mature.

Grades of injury

Schöffl and colleagues described a grading system that runs from a strain of the pulley, through partial ruptures, to complete ruptures of one or more pulleys. More severe injuries, particularly multiple pulley ruptures, may need surgery, while many milder ones are managed without it. Which applies to you is a decision for a doctor after examination, often with ultrasound or other imaging.

Signs you should see a doctor

See a doctor or climbing-experienced physiotherapist if you notice:

• A pop or snap, felt or heard, in a finger while climbing.
• Sharp pain at the base or middle of the finger, on the palm side.
• Swelling or bruising around the finger.
• Pain when gripping or bending the finger, which does not settle quickly.
• Bowstringing: the tendon visibly lifting away from the bone when you bend the finger against resistance.
• Reduced ability to bend or straighten the finger fully.

Bowstringing or a loud pop with immediate pain are reasons to seek medical assessment promptly, not to wait and see.

What not to do

• Do not keep climbing on a finger that popped or hurts sharply.
• Do not tape it and carry on hard climbing as a substitute for assessment.
• Do not follow a rehab plan from the internet without professional input. Recovery timelines and rehabilitation vary widely depending on the injury.

Reducing the risk

No approach removes the risk completely, but sensible habits help:

• Warm up the fingers progressively. See Training safely: warm-ups that actually prepare you.
• Build finger load gradually. Avoid sudden jumps in hangboard or board volume. Read Periodising finger training.
• Use an open-hand grip more often in training, which places less strain on the pulleys than a full crimp.
• Respect fatigue. Many injuries happen late in sessions.
• Be careful with youth athletes. Developing fingers need age-appropriate training. See Youth climbing and long-term development.

A popped pulley is a reason to stop, get it checked and come back properly, not to push through.

In Train Climb

• Track weekly load and the acute:chronic ratio on the Progress page. Sharp jumps in finger-heavy training are worth noticing.
• Use the morning check-in to record soreness. The injury-risk light combines this with your load and skipped sessions.
• Write finger niggles in session notes so you and your coach can see patterns early.
• Coaches can message athletes about a specific session if something looks off, and adjust the season plan around a recovery period.