If you really want to avoid gaining weight I would stay away from the weights. If you're okay with gaining 5 pounds or so I would lift explosively and heavy for low reps. If you don't want to gain weight though, you should focus on things such as plyometrics, BW exercises/circuits, sandbag work, etc. Ultimately though, the weight you gain or don't gain is up to your diet more than anything.
What a stud
Originally Posted by swpthleg
The power of Aleks, his small baby and pimp hardcore dogs has granted you useful insight, my friend.