Of course, no one was born pressing 500 pounds or squatting 700 pounds – it takes time to build this kind of strength. Assuming your form/technique is in place, you'll want to incorporate some low reps and heavy weights into your program. For example, do 10 sets of squats for 3-4 reps each, or 8 sets of 5. In other words, in order to build strength, keep your weight heavy and use low reps for a high number of sets. Squatting your bodyweight is a bare-minimum requirement for a beginner (or twice your bodyweight for an intermediate-level lifter).

Muscle soreness is a common side effect to working out. It subsides as part of the recovery process. Delayed-onset muscle soreness is the most common type of soreness and occurs 24-72 hours after training. This is why rest days are important, to allow soreness to disappear before training again. In fact, if you are scheduled to train and are still sore, take an extra day off.

After session 12, consider whether you need to increase the weight for any particular exercise. If you can comfortably do more than the RM of 12 exercises, increase the weight by a modest amount, say two pounds or a kilogram for isolation exercise muscles such as triceps and biceps, and 5 pounds or 2.5.kilograms for compound and large muscle group exercises like squats and deadlifts. When using dumbbells, this would apply to each one. Don’t increase the number of sets beyond 3 at this time.