3. YOU WORK TO EXHAUSTION
If the biggest musclehead in the gym has taught us anything, it’s that doing lots and lots of sets and reps to the point of total collapse (he can’t even muster his signature grunt!) is the best way to build muscle. Never mind that he’s a genetic freak and/or probably on steroids. More than 20 total sets per muscle group, or more than 15 reps per set, may leave your muscles swollen (hence the ego-enhancing “pump”), but it will be from inflammation, not actual muscle growth. Any weight that allows that much work is too light to cause sub- stantial growth, and you’ll reap no lasting gains.
4. YOU FAVOR BODY-PART WORKOUTS
Breaking your training down into chest days, back days, and arm days over- works some muscles and neglects others. It’s an old-school way to train—and it’s incredibly outdated. Most guys still do it, and many make gains for a while, but their progress eventually comes to a halt, usually due to injuries. Body-part routines also prevent your biggest muscles from ever learning to work together in the kinds of coordinated effort you need to lift really heavy weights—another major avenue for fast growth.