Upper/Lower 4 Day Gym Bodybuilding Split Workout

This is a muscle building workout that I have been using lately now that I am training more often at commercial gyms. It works well both with, and without a training partner. If training with a partner, I recommend keeping rest periods brief. After your partner's set is finished, you should waste little time before hitting your next set.

Each training day is balanced. You start by challenging major muscle groups with 3 sets of compound or taxing machine exercises. Next, you follow up by finishing a muscle group with a more isolation-style movement that typically focuses on the use of 3 second negatives. Lastly, you work smaller muscle groups with 3 sets each, using 3 second negatives when it makes sense.