from your upper body when your legs can easily get it done

[Prius 1959]

 This goes without saying but it'd be good to emphasize it some more. As a climber in an extreme sport, BrainFire you should know your gear inside and out. Don't even think of climbing until you could work it even in the dark. Depend on yourself and no one else.  Rock climbing can be done at any speed you're comfortable with. You may climb slowly and methodically. Or you may climb with speed and finesse, if that suits you better. Whatever the choice, it should depend upon the strengths you already have. Whenever possible, rely on your legs to move you. It is very unwise to sap unnecessary energy Raise one foot at a time.http://www.strongmenmuscle.com/brainfire/