As I understand these substances, they ramp up the bodies abillity to use protien and spped up the recovery process of torn down muscle fiber. (in a nutshell) To promote growth/healing it would make sense to keep a consistant amount in ones system. We lift for around 2 hrs and have 22 hrs to heal. Add the occasoinal day off for extra sleep-more healing.
Personally I pulse. But will dose the night before I lift, and the eve. after to help promote healing.