What's Great About Indoor Rock Climbing? 

Total body workout: Rock climbing works both your upper and lower body, making for a great and effective total body workout.

Increases range of motion and flexibility: Rock climbing increases range of motion, which in turn leads to better/more flexibility

Improves strength and cardio: Rock climbing can improve both strength and cardio simultaneously.

Improved grip strength: Rock climbing will improve your grip strength, and you might also see improvements outside of rock climbing, like being able to lift heavier weights at the gym, for example. 

Boosts brain function: Rock climbing involves a lot of problem solving, llke figuring out the best position for your hands and feet. Rock climbing can also improve body awareness and mind/body awareness.