The most time- and energy-efficient training tool for building climbing-specific grip strength is a hangboard. If you don’t have one at home, I’m sure your climbing gym has several. I own two boards, both from Metolius: the newer Contact Training Board, which I love for the huge variety of incrementally smaller-size grips, and the longtime standard, their Simulator 3D, which has somewhat easier grips. Read more: Training for Rock Climbing Hangboard Training Routine This little hangboard routine is one I made for myself for those times I first begin to think about rock climbing, usually sometime in March and again…