Regardless of how you arrange your workouts regime and routines, it is likely you will find yourself training each less frequently than before, even though you’ll be in the gym more often than in previous period.
Many studies and bodybuilding theoretical researches show that as you get bigger and stronger, the frequency of training decreases.
You know that increase occurs after the training process and not while you’re training. In fact, training actually breaks down protein filaments in muscles, which produce when those filaments rebuild.
As your workouts force progressively greater demands on your muscles, the latter will need more time to recover if they’re to adapt as systematically as possible.
As a beginner, you trained each body-part, for example, three times a week. As an intermediate, your average frequency should fall to no more than twice a week per bodypart, although that might vary a bit.
Many advanced bodybuilders achieve considerable gains by training a bodypart once every 7-10 days, because their workouts are becoming more and more intense.