If I'm strong in the gym will I be good at rock climbing?
The answer is a bit complicated. Being physically fit will benefit you in rock climbing, like it will in many other sports. Traits such as shoulder strength, core strength, and pulling strength are all required to be a successful rock climber.

The key element needed to become a great or even just good rock climber, however, is finger and wrist strength. So much of rock climbing revolves around your ability to hold on to very tiny or oddly shaped grips to keep you on the wall. Few other sports emphasize finger strength the way rock climbing does. Yet, like all other muscles in your body, finger strength is an element that can be developed over time.

With the right balance of both general athletics, body control, and finger strength you can become a great rock climber.