Gyms, hang boards, yoga and cardio can be highways to increasing your climbing performance. For most climbers though modifying your climbing gym routine to maximize productivity is the key. Climbing two lines that you can't top out on isn't going to make you a strong climber.
Similar to gymnastics, technique is key. Understanding footwork, balance and body positioning will get you up the grades faster than any pull up machine.
A hang board is a great home / office solution. If the hang board isn't allowed at work hand trainers are good stress management tools and do have some benefit.Full Article