reps!

[deae1]

for bulking...how many reps are you suppose to do in each set? i heard 4-6 then i heard its 8-12 or 6-15..and how many sets is good?

 

[Fil]

8-12 reps and 10 - 20 sets at slightly lower-than-usual weights are optimal for size gains.

 

[evolution]

Dae, it's not quite that simple. You have to take into account the overall volume rather than just how many reps should you do. If you want to maximize size, try a 5X8 approach and hit each muscle group with 3 movements or there's the 5X5 with each muscle group at 4 movements.