Ideally, men should start their bulk around 8-10% BF and end it around 15-17%. Women should start at around 18-20% BF and end at around 25%. This, of course, maybe very slight, but there is little benefit to bulking once you are already toward the higher end of those ranges (and in fact, your body is less primed to build muscle and more inclined to increase fat storage, visceral fat, increase inflammation, and decrease anabolic hormone output (testosterone and estrogen). Watch this video to calculate your calorie needs and run a clean, healthy bulk - https://www.youtube.com/watch?v=_fgydXv-CqQ Watch this to learn how to train during your clean bulk - https://www.youtube.com/watch?v=xFwUC-SHm8M