Question: how to choose the right amount of weight to lift?
Answer: Think of “heavy” as that 1- to 5-rep range, “moderate” as the 6- to 15-rep range, and “light” as more than 15 reps, Schoenfeld says. If you're looking to improve performance, you should stick to a weight that falls in your “heavy” range—a weight you can lift 3 to 5 reps for 2 to 3 sets.