Muscle Building 4-Day Workout Plan Day 1: Chest and Triceps 1. Barbell Bench Press - 4 sets of 8-12 reps 2. Dumbbell Bench Press - 4 sets of 8-12 reps 3. Chest Flys - 3 sets of 10-12 reps 4. Parallel Dips - 3 sets of 8-12 reps 5. Tricep Pushdowns - 3 sets of 10-12 reps Day 2: Back and Biceps 1. Deadlifts - 4 sets of 8-10 reps 2. Pull-ups - 4 sets of 8-12 reps 3. Barbell Rows - 3 sets of 8-12 reps 4. Dumbbell Bicep Curls - 4 sets of 8-12 reps 5. Barbell Bicep Curls - 3 sets of 8-12 reps Day 4: Legs and Abs 1. Barbell Squats - 4 sets of 8-12 reps 2. Leg Press - 4 sets of 10-12 reps 3. Leg Extensions - 3 sets of 10-12 reps 4. Crunches - 3 sets of 15-20 reps 5. Plank - 3 sets of 30-60 seconds Day 5: Shoulders and Abs 1. Barbell Shoulder Press - 4 sets of 8-12 reps 2. Lateral Dumbbell Raises - 3 sets of 10-12 reps 3. Front Dumbbell Raises - 3 sets of 10-12 reps 4. Reverse Crunches - 3 sets of 15-20 reps 5. Side Planks - 3 sets of 30-60 seconds This plan is designed for intermediate level individuals.