In reply to iain roberto:
Very interesting advice....but useless.
His time (the crucial factor in everybody's training) would be better spent training weaknesses. When did you last fall off a BOULDER PROBLEM in a comp due to not having strong enough legs!
Hanging a crimp on a 45 degree wall and throwing to another is going to to need other factors than leg strength and aerobic fitness.
In a well rounded training programme aerobic exercise has an important place, but three times a week in training for a boulder comp? He'd be better off spending that time (3 hours?) hanging off a fingerboard, doing weighted pull-ups, broom-of-doom, presses, rotator cuff work, core etc etc etc.....then when body fat, weight, aerobic fitness for sport routes etc become his weakness start with more of a focus on aerobic training.