I usually switch it up and will do BB movements for a few weeks then DB movements for a few weeks, although i find, and have read somewhere else that with DB movements, yes you are using more muscles to stabilize the weight, but i find with BB you can focus a little more on really contracting just your chest and really isolating your chest and using it as the primary source to help power the weight up. Obviously shoulders and triceps are helping to stabilize and helping with the lift in BB movements as well for bench but i find with BB your not focusing so much on really stabilizing the weight as you are just powering the weight up throughout the ROM. Plus for BB movements its typical that you can usually go heavier then you would be with DB, which is primarly because like i said DB your calling upon even more muscle groups and most on which are smaller muscle groups to help stabilize. So for compound movements like bench, and military press for example i actually prefer BB, and DB's more for isolation movements such as flies, or decline press. Where you can really focus on your inner chest, which you can't so much with BB. But like i said i, like alot of the guys do presses with both BB and DB, i just prefer BB.




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