Sudden dynamic loading can create a non-impact acute trauma to the annular pulley system. If a 155 lb climber “blows a hand” and falls from the wall, this can load an individual pulley up to 450N. Similarly, a dynamic move to grab a hold can shock load the pulley system past its physiological limit. Climbers may report feeling or hearing an audible “pop” when this occurs, although other injuries may produce a similar sound.
Chronic overuse annular pulley injuries usually result from repetitive loading and increased volume of training. Overuse of training tools such as a the campus board, hang board, and systems wall with inadequate rest and improper finger positioning may eventually lead to a partial tear of one or more of the annular pulleys. If not addressed appropriately, continued loading can result in chronic degenerative changes to the annular pulleys.
Sufficient time should be spent increasing blood flow � and mobility to these structures within the hand prior to climbing. Tendon gliding exercises and active range of motion for the fingers and wrist should all be utilized as part of a comprehensive injury prevention program.
Chang (2016) "Rock climbing injuries: acute and chronic repetitive trauma "