if you want mass (definition is a DIFFERENT THING--really brought MORE by diet than the stimulation in the gym) you need proper gym training (the stimulus), and more importantly, recuperation (REST,,,and where the growth REALLY occurs). Experiment with different things and find what works for you. Some get good results from using heavy dumbells (because of the freedom it creates and thus recuits different muscle fibers than the standard bench press and standard incline bench press. The weight USED is NOT as important as--------being progressive or progressive overload, and this can be managed in many ways. WHile I support compound movements as the theme or staple, using heavy dumbells at appropriate repage, can have its benefits to some people due to the different mucle fiber rectuitment, and it provides the body something DIFFERENT that its not used to.....WHICH IS ALWAY GOOD. most will edvocate lifting heavy for mass (and being in a caloric surplus OF COURSE), I say, find out what works BEST and experiment. Try heavy (4 to 6 reps) and see what happens (with proper diet) and rest. if not good results, then try something like a progressive tier system (220, 225, 230,,,,,,each set progresses 5 pounds or like a pyrimid), and the combinations are endless. It is almost frutile, to say I have tried EVERYTHING and nothing works.......to this I say.....BUH!,,,,,you havent tried the one that fricken works yet....keep TRUCKEN!
Chillen