both hands at the same time. (see also 9 types of drills to make you a better ball handler.) on top of that, we found that our athletes improved a lot faster dribbling with two balls because of the concentration it requires. they can no longer focus on just one ball, because as soon as they do, they lose the other one.
get started becoming a better player with this two-ball dribble warm-up. it looks extremely simple, but if you really push yourself, it's a great 10-15 minute warm-up. 