Sonnie Trotter provides five tips for getting better at climbing rooted in the following premise:

The worlds most accomplished sport climber and boulderer Adam Ondra has recently completed his first one arm chin up according to Planet Mountain.com.   This fact only reinforces what I (and dozens of other climbers and coaches) have said for years, the key to climbing hard is not in the arms at all.  It’s mostly in the fingers and core.