Science-Based Bodybuilding program. To focus on a certain body part do it early in a workout. Between series rest for at least 2 minutes. Rest also between sides while doing unilateral training: I would suggest taking the total rest time and dividing it into 2. If the volume isn't enough for muscular development experiment with a higher one ( I suggest seeing for each muscle and not compressively). Reach at least RPE 9 ( can do another clear rep).