Rock climbing builds muscle and endurance.
Contrary to what many beginners may believe, climbing requires much more than upper-body strength. The success of completing a route relies heavily on a long list of physical factors, including footwork, lower body strength, and lean muscle mass. Although not often thought of as a common form of cardio, ascending walls is a sure way to get your heart pumping, similar to the way climbing stairs or jogging does.
Climbing boosts brain function.
In addition to building up muscle and helping you get that cardio, climbing involves problem-solving skills — which explains why bouldering routes are actually called “problems.” But whether athletes are scaling cliffs or conquering long traverses in their local bouldering cave, time on the rocks is anything but mindless.
As you climb you are consistently having to problem solve, you need to figure out the next move, “where do I put my feet now?”, “How must I position my weight to get maximum strength?”. These types of questions while climbing build your mental fitness, and with time you start to know exactly what your body is able to do.