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Muscle Monsters Mass 40
Intermediate–AdvancedFree

Muscle Monsters Mass 40

Unleash your inner beast in just 6 weeks—transform your physique and pack on serious mass with 4 powerful workouts each week!

Art M.
Art M.· Aug 2025
3athletes running this program
iOS & Android

Overview

Length
6 weeks
Days / week
4 days
Level
Intermediate, Advanced
Goal
Muscle
Equipment
Full Gym
Session length
60 min
Unleash your inner beast with Muscle Monsters Mass 40, a comprehensive 6-week bodybuilding program designed for all fitness levels. Committing just 4 days a week for 60 minutes per session, you’ll engage in targeted workouts that maximize muscle growth and strength. With a full gym at your disposal, this program combines effective techniques to sculpt and define your physique. Get ready to transform your body and build serious mass!

Who it's for

Athletes at the Intermediate–Advanced level
Athletes focused on building muscle size
Athletes who can train 4 days per week
Athletes with access to a full gym (barbells, dumbbells, cables, and machines)

Muscle engagement

Front
Back
Quadriceps
10.8%
Hamstrings
10.8%
Upper Back
10.6%
Front Delts
10%
Triceps
9.9%
Glutes
9.4%
Biceps
6.6%
Middle Delts
6.4%
Lats
6.2%
Abs
5.6%
Chest
4.3%
Forearms
2.4%
Lower Back
2.4%
Rear Delts
2.2%
Adductors
1.6%
Abductors
0.7%
Week 1 Workouts
#ExerciseSetsRepsIntensity
1Squat (Barbell)36 reps@9
2Seated Military Press (Smith Machine)36 reps@9
3Bench Press (Dumbbell)36 reps@9
4Leg Press38 reps@9
5Upright Row (Barbell)410–12 reps@9
6Skull Crusher (Barbell)210–12 reps@9
#ExerciseSetsRepsIntensity
1Romanian Deadlift (Barbell)310 reps@9
2T-Bar Row310 reps@9
3Lat Pulldown312 reps@9
4Seated Hamstring Curl312–15 reps@9
5Face Pull312–15 reps@9
6Incline Curl (Dumbbell)212–15 reps@9
7Preacher Curl (EZ Bar)210–12 reps@9
#ExerciseSetsRepsIntensity
1Squat (Smith Machine)310 reps@9
2Seated Overhead Press (Dumbbell)310 reps@9
3Chest Press (Machine)310 reps@9
4Leg Extension310–12 reps@9
5Lateral Raise (Cable)412–15 reps@9
6Dip (Weighted)212–15 reps@9
7Tricep Pushdown (Cable)210–12 reps@9
#ExerciseSetsRepsIntensity
1Trap Bar Deadlift35 reps@9
2Pendlay Row36 reps@9
3Romanian Deadlift (Dumbbell)38 reps@9
4Pull-Up (Weighted)38 reps@9
5Face Pull312–15 reps@9
6Bicep Curl (Barbell)210–12 reps@9

Weeks 2–6 are in the app

Download Boostcamp to follow the full program with auto-progression and built-in coaching notes.

Common questions

Yes, Muscle Monsters Mass 40 is completely free to follow on Boostcamp. Download the app on iOS or Android, find the program, and start your first workout immediately. All 6 weeks are fully unlocked.

This program is built around a full gym. Make sure you have consistent access before starting, since the progression model assumes you can perform the same movements week over week.

Each session typically takes around 60 minutes to complete. That estimate covers your working sets but doesn't account for warm-up or rest between sets, so budget a little extra time when you're first learning the movements.

Muscle Monsters Mass 40 is structured around 4 training days per week, with rest days built in to allow for recovery. The Boostcamp app lets you reschedule sessions if your week doesn't go to plan.

The program runs for 6 weeks. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.

Muscle Monsters Mass 40 is available inside the Boostcamp app, free on iOS and Android. Once you download the app, you can search for the program by name. The app tracks all your sets and weights automatically, so you always know exactly what to do next session.

Get started

Boostcamp app
11,000+ free programsStrength, hypertrophy, powerlifting and more, from elite coaches. All free.
Auto-progressionWeights and targets update automatically based on how you perform.
Coaching notesBuilt-in cues from the creator inside every workout session.
Progress trackingLog every set and see your strength gains over weeks and months.
Advanced analyticsTrack volume, intensity, and 1RM trends to see exactly how your training is evolving.
Free on iOS & Android