BUILDING MUSCLE TAKES a plan. If you schlep to the gym four times a week, pick up a random pair of dumbbells, and do a few sets of random reps for a handful of exercises, your results aren’t going to ...

Knowing how many sets to do per workout is a minefield. In fact, just listening to your PT reel off the many different types of set names can feel like you've landed in a foreign country. That's why ...