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28-Day Mass BuilderA focused 4‑day training split designed to pack serious muscle onto your entire body in just four weeks.https://api.workoutingym.com/storage/workout-routines/routine-67-Bf5Nj9QkxBgnY9UQ.jpg2026-03-28T22:13:23.000000ZBack to routines
28-Day Mass Builder

28-Day Mass Builder

A focused 4‑day training split designed to pack serious muscle onto your entire body in just four weeks.

Intermediate
Build Muscle
4 days/week
Gym
For Men
28 Days

Description

This 28‑day muscle‑building program is designed for intermediate lifters who are ready to push their training harder and add noticeable size across their entire body. You’ll train four days per week using a classic bodybuilding split that allows each muscle group to be trained hard while still getting enough recovery time to grow.
Each training week focuses on big compound lifts for strength and muscle stimulation, supported by accessory movements to fully fatigue the muscles. You’ll hit legs, chest, shoulders, back, and arms with enough intensity to trigger hypertrophy while spacing your workouts with rest days so your body can recover and rebuild stronger.

Important Notice

You can run this program for two full cycles (56 days). After finishing Day 28, simply start again from Day 1 and repeat the schedule.

Workout Plan

Day 1 — Legs & Abs

1
Barbell Front Squat - frame 1
Barbell Front Squat - frame 2
SetRepsWeight
18-
28-
38-
48-
2
Lever Leg Extension - frame 1
Lever Leg Extension - frame 2
SetRepsWeight
112-
212-
3
Barbell Quarter Squat - frame 1
Barbell Quarter Squat - frame 2
SetRepsWeight
18-
28-
38-
48-
4
Lever Lying Leg Curl - frame 1
Lever Lying Leg Curl - frame 2
SetRepsWeight
112-
212-
5
Smith Machine Squat - frame 1
Smith Machine Squat - frame 2
SetRepsWeight
18-
28-
38-
48-
6
Barbell Lunge - frame 1
Barbell Lunge - frame 2
SetRepsWeight
112-
212-
312-
412-
7
Lever Standing Calf Raise - frame 1
Lever Standing Calf Raise - frame 2
SetRepsWeight
114-
214-
314-
414-
8
Lever Seated Calf Raise (Plate-Loaded) - frame 1
Lever Seated Calf Raise (Plate-Loaded) - frame 2
SetRepsWeight
114-
214-
314-
414-
9
Cable Kneeling Crunch - frame 1
Cable Kneeling Crunch - frame 2
SetRepsWeight
120-
220-
320-
420-

Day 2 — Chest & Triceps

1
Barbell Bench Press - frame 1
Barbell Bench Press - frame 2
SetRepsWeight
18-
28-
38-
48-
2
Dumbbell Bench Press - frame 1
Dumbbell Bench Press - frame 2
SetRepsWeight
112-
212-
3
Barbell Incline Bench Press - frame 1
Barbell Incline Bench Press - frame 2
SetRepsWeight
18-
28-
38-
48-
4
Dumbbell Incline Bench Press - frame 1
Dumbbell Incline Bench Press - frame 2
SetRepsWeight
112-
212-
5
Smith Machine Decline Bench Press - frame 1
Smith Machine Decline Bench Press - frame 2
SetRepsWeight
112-
212-
312-
412-
7
Weighted Bench Dip - frame 1
Weighted Bench Dip - frame 2
SetRepsWeight
110-
210-
310-
410-

Rest Day

Rest Day

Take this day to rest and recover. Your muscles grow during rest!

Day 4 — Shoulders, Traps & Abs

1
Standing Behind Neck Press - frame 1
Standing Behind Neck Press - frame 2
SetRepsWeight
18-
28-
38-
48-
2
Dumbbell Seated Shoulder Press - frame 1
Dumbbell Seated Shoulder Press - frame 2
SetRepsWeight
112-
212-
3
Smith Machine Upright Row - frame 1
Smith Machine Upright Row - frame 2
SetRepsWeight
18-
28-
38-
48-
4
Dumbbell Upright Row - frame 1
Dumbbell Upright Row - frame 2
SetRepsWeight
112-
212-
5
Dumbbell Lateral Raise - frame 1
Dumbbell Lateral Raise - frame 2
SetRepsWeight
18-
28-
38-
48-
6
Lever Seated Reverse Fly (Parallel Grip) - frame 1
Lever Seated Reverse Fly (Parallel Grip) - frame 2
SetRepsWeight
112-
212-
312-
412-
7
Barbell Shrug - frame 1
Barbell Shrug - frame 2
SetRepsWeight
112-
212-
312-
412-
8
Dumbbell Shrug - frame 1
Dumbbell Shrug - frame 2
SetRepsWeight
112-
212-
9
Crunch (Floor) - frame 1
Crunch (Floor) - frame 2
SetRepsWeight
120-
220-
320-
420-
1
Barbell Deadlift - frame 1
Barbell Deadlift - frame 2
SetRepsWeight
18-
28-
38-
48-
2
Dumbbell Deadlift - frame 1
Dumbbell Deadlift - frame 2
SetRepsWeight
112-
212-
3
Barbell Bent-Over Row - frame 1
Barbell Bent-Over Row - frame 2
SetRepsWeight
18-
28-
38-
48-
4
Dumbbell Bent-Over Row - frame 1
Dumbbell Bent-Over Row - frame 2
SetRepsWeight
112-
212-
5
Lever Bent-over Row (plate-loaded) - frame 1
Lever Bent-over Row (plate-loaded) - frame 2
SetRepsWeight
18-
28-
38-
48-
6
Cable Rear Pulldown - frame 1
Cable Rear Pulldown - frame 2
SetRepsWeight
18-
28-
38-
48-
7
Barbell Standing Wide-Grip Curl - frame 1
Barbell Standing Wide-Grip Curl - frame 2
SetRepsWeight
19-
29-
39-
49-
8
Barbell Preacher Curl - frame 1
Barbell Preacher Curl - frame 2
SetRepsWeight
18-
28-
38-
48-
9
Dumbbell Hammer Curl - frame 1
Dumbbell Hammer Curl - frame 2
SetRepsWeight
18-
28-
38-
48-

Rest Day

Rest Day

Take this day to rest and recover. Your muscles grow during rest!

Rest Day

Rest Day

Take this day to rest and recover. Your muscles grow during rest!

Day 8 — Legs & Abs

1
Barbell Quarter Squat - frame 1
Barbell Quarter Squat - frame 2
SetRepsWeight
18-
28-
38-
48-
2
Lever Lying Leg Curl - frame 1
Lever Lying Leg Curl - frame 2
SetRepsWeight
112-
212-
312-
3
Barbell Front Squat - frame 1
Barbell Front Squat - frame 2
SetRepsWeight
18-
28-
38-
48-
4
Lever Leg Extension - frame 1
Lever Leg Extension - frame 2
SetRepsWeight
112-
212-
5
Smith Machine Squat - frame 1
Smith Machine Squat - frame 2
SetRepsWeight
18-
28-
38-
48-
6
Barbell Lunge - frame 1
Barbell Lunge - frame 2
SetRepsWeight
112-
212-
312-
412-
7
Lever Standing Calf Raise - frame 1
Lever Standing Calf Raise - frame 2
SetRepsWeight
120-
220-
320-
420-
8
Lever Seated Calf Raise (Plate-Loaded) - frame 1
Lever Seated Calf Raise (Plate-Loaded) - frame 2
SetRepsWeight
115-
215-
315-
415-
9
Cable Kneeling Crunch - frame 1
Cable Kneeling Crunch - frame 2
SetRepsWeight
120-
220-
320-
420-

Day 9 — Chest & Triceps

1
Barbell Incline Bench Press - frame 1
Barbell Incline Bench Press - frame 2
SetRepsWeight
18-
28-
38-
48-
2
Dumbbell Incline Bench Press - frame 1
Dumbbell Incline Bench Press - frame 2
SetRepsWeight
112-
212-
3
Barbell Bench Press - frame 1
Barbell Bench Press - frame 2
SetRepsWeight
18-
28-
38-
48-
4
Dumbbell Bench Press - frame 1
Dumbbell Bench Press - frame 2
SetRepsWeight
112-
212-
5
Smith Machine Decline Bench Press - frame 1
Smith Machine Decline Bench Press - frame 2
SetRepsWeight
18-
28-
38-
48-
6
Dumbbell Decline Bench Press - frame 1
Dumbbell Decline Bench Press - frame 2
SetRepsWeight
112-
212-
7
Cable Lying Fly - frame 1
Cable Lying Fly - frame 2
SetRepsWeight
112-
212-
312-
412-
8
Barbell Lying Triceps Extension - frame 1
Barbell Lying Triceps Extension - frame 2
SetRepsWeight
110-
210-
310-
410-
9
Weighted Bench Dip - frame 1
Weighted Bench Dip - frame 2
SetRepsWeight
110-
210-
310-
410-

Rest Day

Rest Day

Take this day to rest and recover. Your muscles grow during rest!

Day 11 — Shoulders, Traps & Abs

1
Smith Machine Behind-the-Neck Press - frame 1
Smith Machine Behind-the-Neck Press - frame 2
SetRepsWeight
18-
28-
38-
48-
2
Dumbbell Seated Shoulder Press - frame 1
Dumbbell Seated Shoulder Press - frame 2
SetRepsWeight
112-
212-
3
Smith Machine Upright Row - frame 1
Smith Machine Upright Row - frame 2
SetRepsWeight
18-
28-
38-
48-
4
Dumbbell Upright Row - frame 1
Dumbbell Upright Row - frame 2
SetRepsWeight
112-
212-
5
Dumbbell Lateral Raise - frame 1
Dumbbell Lateral Raise - frame 2
SetRepsWeight
18-
28-
38-
48-
6
Lever Seated Reverse Fly (Parallel Grip) - frame 1
Lever Seated Reverse Fly (Parallel Grip) - frame 2
SetRepsWeight
112-
212-
312-
412-
7
Barbell Shrug - frame 1
Barbell Shrug - frame 2
SetRepsWeight
112-
212-
312-
412-
8
Dumbbell Shrug - frame 1
Dumbbell Shrug - frame 2
SetRepsWeight
112-
212-
9
Crunch (Floor) - frame 1
Crunch (Floor) - frame 2
SetRepsWeight
120-
220-
320-
420-

Day 12 — Back & Biceps

1
Barbell Deadlift - frame 1
Barbell Deadlift - frame 2
SetRepsWeight
18-
28-
38-
48-
2
Dumbbell Deadlift - frame 1
Dumbbell Deadlift - frame 2
SetRepsWeight
112-
212-
3
Barbell Bent-Over Row - frame 1
Barbell Bent-Over Row - frame 2
SetRepsWeight
18-
28-
38-
48-
4
Dumbbell Bent-Over Row - frame 1
Dumbbell Bent-Over Row - frame 2
SetRepsWeight
112-
212-
5
Lever Bent-over Row (plate-loaded) - frame 1
Lever Bent-over Row (plate-loaded) - frame 2
SetRepsWeight
18-
28-
38-
48-
6
Cable Wide-Grip Lat Pulldown - frame 1
Cable Wide-Grip Lat Pulldown - frame 2
SetRepsWeight
18-
28-
38-
48-
7
Barbell Standing Wide-Grip Curl - frame 1
Barbell Standing Wide-Grip Curl - frame 2
SetRepsWeight
18-
28-
38-
48-
8
Barbell Preacher Curl - frame 1
Barbell Preacher Curl - frame 2
SetRepsWeight
19-
29-
39-
49-
9
Dumbbell Hammer Curl - frame 1
Dumbbell Hammer Curl - frame 2
SetRepsWeight
18-
28-
38-
48-

Rest Day

Rest Day

Take this day to rest and recover. Your muscles grow during rest!

Rest Day

Rest Day

Take this day to rest and recover. Your muscles grow during rest!

Day 15 — Legs & Abs

1
Smith Machine Squat - frame 1
Smith Machine Squat - frame 2
SetRepsWeight
18-
28-
38-
48-
2
Barbell Lunge - frame 1
Barbell Lunge - frame 2
SetRepsWeight
112-
212-
312-
412-
3
Barbell Front Squat - frame 1
Barbell Front Squat - frame 2
SetRepsWeight
18-
28-
38-
48-
4
Lever Leg Extension - frame 1
Lever Leg Extension - frame 2
SetRepsWeight
112-
212-
5
Barbell Quarter Squat - frame 1
Barbell Quarter Squat - frame 2
SetRepsWeight
18-
28-
38-
48-
6
Lever Lying Leg Curl - frame 1
Lever Lying Leg Curl - frame 2
SetRepsWeight
112-
212-
7
Lever Standing Calf Raise - frame 1
Lever Standing Calf Raise - frame 2
SetRepsWeight
120-
220-
320-
420-
8
Lever Seated Calf Raise (Plate-Loaded) - frame 1
Lever Seated Calf Raise (Plate-Loaded) - frame 2
SetRepsWeight
120-
220-
320-
420-
9
Cable Kneeling Crunch - frame 1
Cable Kneeling Crunch - frame 2
SetRepsWeight
120-
220-
320-
420-

Day 16 — Chest & Triceps

1
Smith Machine Decline Bench Press - frame 1
Smith Machine Decline Bench Press - frame 2
SetRepsWeight
18-
28-
38-
48-
2
Dumbbell Decline Bench Press - frame 1
Dumbbell Decline Bench Press - frame 2
SetRepsWeight
112-
212-
3
Barbell Bench Press - frame 1
Barbell Bench Press - frame 2
SetRepsWeight
18-
28-
38-
48-
4
Dumbbell Bench Press - frame 1
Dumbbell Bench Press - frame 2
SetRepsWeight
112-
212-
5
Barbell Incline Bench Press - frame 1
Barbell Incline Bench Press - frame 2
SetRepsWeight
18-
28-
38-
48-
6
Dumbbell Incline Bench Press - frame 1
Dumbbell Incline Bench Press - frame 2
SetRepsWeight
112-
212-
7
Cable Lying Fly - frame 1
Cable Lying Fly - frame 2
SetRepsWeight
112-
212-
312-
412-
8
Barbell Lying Triceps Extension - frame 1
Barbell Lying Triceps Extension - frame 2
SetRepsWeight
18-
28-
38-
48-
9
Weighted Bench Dip - frame 1
Weighted Bench Dip - frame 2
SetRepsWeight
110-
210-
310-
410-

Rest Day

Rest Day

Take this day to rest and recover. Your muscles grow during rest!

Day 18 — Shoulders, Traps & Abs

1
Smith Machine Behind-the-Neck Press - frame 1
Smith Machine Behind-the-Neck Press - frame 2
SetRepsWeight
18-
28-
38-
48-
2
Dumbbell Seated Shoulder Press - frame 1
Dumbbell Seated Shoulder Press - frame 2
SetRepsWeight
112-
212-
3
Smith Machine Upright Row - frame 1
Smith Machine Upright Row - frame 2
SetRepsWeight
18-
28-
38-
48-
4
Dumbbell Upright Row - frame 1
Dumbbell Upright Row - frame 2
SetRepsWeight
112-
212-
5
Dumbbell Lateral Raise - frame 1
Dumbbell Lateral Raise - frame 2
SetRepsWeight
18-
28-
38-
48-
6
Lever Seated Reverse Fly (Parallel Grip) - frame 1
Lever Seated Reverse Fly (Parallel Grip) - frame 2
SetRepsWeight
112-
212-
312-
412-
7
Barbell Shrug - frame 1
Barbell Shrug - frame 2
SetRepsWeight
112-
212-
312-
412-
8
Dumbbell Shrug - frame 1
Dumbbell Shrug - frame 2
SetRepsWeight
112-
212-
9
Crunch (Floor) - frame 1
Crunch (Floor) - frame 2
SetRepsWeight
120-
220-
320-
420-

Day 19 — Back & Biceps

1
Barbell Deadlift - frame 1
Barbell Deadlift - frame 2
SetRepsWeight
18-
28-
38-
48-
2
Dumbbell Deadlift - frame 1
Dumbbell Deadlift - frame 2
SetRepsWeight
112-
212-
3
Barbell Bent-Over Row - frame 1
Barbell Bent-Over Row - frame 2
SetRepsWeight
18-
28-
38-
48-
4
Dumbbell Bent-Over Row - frame 1
Dumbbell Bent-Over Row - frame 2
SetRepsWeight
112-
212-
5
Lever Bent-over Row (plate-loaded) - frame 1
Lever Bent-over Row (plate-loaded) - frame 2
SetRepsWeight
18-
28-
38-
48-
6
Cable Wide-Grip Lat Pulldown - frame 1
Cable Wide-Grip Lat Pulldown - frame 2
SetRepsWeight
18-
28-
38-
48-
7
Barbell Standing Wide-Grip Curl - frame 1
Barbell Standing Wide-Grip Curl - frame 2
SetRepsWeight
18-
28-
38-
48-
8
Barbell Preacher Curl - frame 1
Barbell Preacher Curl - frame 2
SetRepsWeight
110-
210-
310-
410-
9
Dumbbell Hammer Curl - frame 1
Dumbbell Hammer Curl - frame 2
SetRepsWeight
18-
28-
38-
48-

Rest Day

Rest Day

Take this day to rest and recover. Your muscles grow during rest!

Rest Day

Rest Day

Take this day to rest and recover. Your muscles grow during rest!

Day 22 — Legs & Abs

1
Barbell Front Squat - frame 1
Barbell Front Squat - frame 2
SetRepsWeight
18-
28-
38-
48-
2
Lever Leg Extension - frame 1
Lever Leg Extension - frame 2
SetRepsWeight
112-
212-
3
Barbell Quarter Squat - frame 1
Barbell Quarter Squat - frame 2
SetRepsWeight
18-
28-
38-
48-
4
Lever Lying Leg Curl - frame 1
Lever Lying Leg Curl - frame 2
SetRepsWeight
112-
212-
5
Smith Machine Squat - frame 1
Smith Machine Squat - frame 2
SetRepsWeight
18-
28-
38-
48-
6
Barbell Lunge - frame 1
Barbell Lunge - frame 2
SetRepsWeight
112-
212-
312-
412-
7
Lever Standing Calf Raise - frame 1
Lever Standing Calf Raise - frame 2
SetRepsWeight
115-
215-
315-
415-
8
Lever Seated Calf Raise (Plate-Loaded) - frame 1
Lever Seated Calf Raise (Plate-Loaded) - frame 2
SetRepsWeight
115-
215-
315-
415-
9
Cable Kneeling Crunch - frame 1
Cable Kneeling Crunch - frame 2
SetRepsWeight
120-
220-
320-
420-

Day 23 — Chest & Triceps

1
Barbell Bench Press - frame 1
Barbell Bench Press - frame 2
SetRepsWeight
18-
28-
38-
48-
2
Dumbbell Bench Press - frame 1
Dumbbell Bench Press - frame 2
SetRepsWeight
112-
212-
3
Barbell Incline Bench Press - frame 1
Barbell Incline Bench Press - frame 2
SetRepsWeight
18-
28-
38-
48-
4
Dumbbell Incline Bench Press - frame 1
Dumbbell Incline Bench Press - frame 2
SetRepsWeight
112-
212-
5
Smith Machine Decline Bench Press - frame 1
Smith Machine Decline Bench Press - frame 2
SetRepsWeight
18-
28-
38-
48-
6
Dumbbell Decline Bench Press - frame 1
Dumbbell Decline Bench Press - frame 2
SetRepsWeight
112-
212-
7
Cable Lying Fly - frame 1
Cable Lying Fly - frame 2
SetRepsWeight
112-
212-
312-
412-
8
Weighted Bench Dip - frame 1
Weighted Bench Dip - frame 2
SetRepsWeight
110-
210-
310-
410-

Rest Day

Rest Day

Take this day to rest and recover. Your muscles grow during rest!

Day 25 — Shoulders, Traps & Abs

1
Smith Machine Behind-the-Neck Press - frame 1
Smith Machine Behind-the-Neck Press - frame 2
SetRepsWeight
18-
28-
38-
48-
2
Dumbbell Seated Shoulder Press - frame 1
Dumbbell Seated Shoulder Press - frame 2
SetRepsWeight
112-
212-
3
Smith Machine Upright Row - frame 1
Smith Machine Upright Row - frame 2
SetRepsWeight
18-
28-
38-
48-
4
Dumbbell Upright Row - frame 1
Dumbbell Upright Row - frame 2
SetRepsWeight
112-
212-
5
Dumbbell One-Arm Lateral Raise - frame 1
Dumbbell One-Arm Lateral Raise - frame 2
SetRepsWeight
18-
28-
38-
48-
6
Lever Seated Reverse Fly (Parallel Grip) - frame 1
Lever Seated Reverse Fly (Parallel Grip) - frame 2
SetRepsWeight
112-
212-
312-
412-
7
Barbell Shrug - frame 1
Barbell Shrug - frame 2
SetRepsWeight
112-
212-
312-
412-
8
Dumbbell Shrug - frame 1
Dumbbell Shrug - frame 2
SetRepsWeight
112-
212-
312-
412-
9
Crunch (Floor) - frame 1
Crunch (Floor) - frame 2
SetRepsWeight
120-
220-
320-
420-

Day 26 — Back & Biceps

1
Barbell Deadlift - frame 1
Barbell Deadlift - frame 2
SetRepsWeight
18-
28-
38-
48-
2
Dumbbell Deadlift - frame 1
Dumbbell Deadlift - frame 2
SetRepsWeight
112-
212-
3
Barbell Bent-Over Row - frame 1
Barbell Bent-Over Row - frame 2
SetRepsWeight
18-
28-
38-
48-
4
Dumbbell Bent-Over Row - frame 1
Dumbbell Bent-Over Row - frame 2
SetRepsWeight
112-
212-
5
Lever Bent-over Row (plate-loaded) - frame 1
Lever Bent-over Row (plate-loaded) - frame 2
SetRepsWeight
18-
28-
38-
48-
6
Cable Wide-Grip Lat Pulldown - frame 1
Cable Wide-Grip Lat Pulldown - frame 2
SetRepsWeight
18-
28-
38-
48-
7
Barbell Standing Wide-Grip Curl - frame 1
Barbell Standing Wide-Grip Curl - frame 2
SetRepsWeight
18-
28-
38-
48-
8
Barbell Preacher Curl - frame 1
Barbell Preacher Curl - frame 2
SetRepsWeight
18-
28-
38-
48-
9
Dumbbell Hammer Curl - frame 1
Dumbbell Hammer Curl - frame 2
SetRepsWeight
18-
28-
38-
48-

Rest Day

Rest Day

Take this day to rest and recover. Your muscles grow during rest!

Rest Day

Rest Day

Take this day to rest and recover. Your muscles grow during rest!