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MassBuilder
IntermediateFree

MassBuilder

Transform your physique in 8 weeks with MassBuilder: where strength meets size for serious gains in the gym. Get ready to unleash your potential!

elias v
elias v· Jul 2025
iOS & Android

Overview

Length
8 weeks
Days / week
6 days
Level
Intermediate
Goal
Muscle, Strength
Equipment
Full Gym
Session length
70 min
**MassBuilder** is an intensive 8-week program designed to maximize muscle growth and strength through a structured regimen of 48 workouts. Each session, lasting about 70 minutes, combines compound and isolation exercises targeting all major muscle groups, ensuring a balanced approach to bodybuilding and powerbuilding. With a focus on progressive overload and varied intensity, this program is perfect for intermediate lifters ready to take their training to the next level. Equip yourself with access to a full gym, and prepare to transform your physique!

Who it's for

Intermediate athletes ready for a structured program
Athletes focused on gaining both size and strength
Athletes who can train 6 days per week
Athletes with access to a full gym (barbells, dumbbells, cables, and machines)

Muscle engagement

Front
Back
Chest
12.1%
Upper Back
9.2%
Front Delts
9%
Triceps
9%
Lats
8.5%
Quadriceps
8.5%
Biceps
8.1%
Middle Delts
6.9%
Hamstrings
5.7%
Glutes
4.7%
Calves
4.7%
Abs
3.8%
Rear Delts
3.6%
Lower Back
2.8%
Adductors
2.4%
Forearms
0.9%
Week 1 Workouts
#ExerciseSetsRepsLoad
1Single Arm Iso Row28 reps@10
2Lat Pulldown (Close Grip)2AMRAP@10
3Standing Pullover (Cable)2AMRAP@10
4T-Bar Row38 reps@10
5Bicep Curl (Cable)2AMRAP@10
6Reverse Pec Deck2AMRAP@10
7Incline Curl (Dumbbell)2AMRAP@10
#ExerciseSetsRepsLoad
1Deadlift (Barbell)16 reps
23 reps
11 rep
2Hack Squat28 reps@10
3Leg Curl2AMRAP@10
4Leg Extension2AMRAP@10
5Hip Adductor (Machine)212 reps@10
6Calf Raise (Leg Press)2AMRAP@10
7Seated Calf Raise28 reps@10
8Abs Crunch (Weighted)215 reps@10
#ExerciseSetsRepsLoad
1Bench Press (Barbell)16 reps@10
13 reps@10
12 reps@10
11 rep@10
2Incline Bench Press (Dumbbell)28 reps@10
3Pec Deck (Machine)3AMRAP@10
4Lateral Raise (Dumbbell)210 reps@10
5Overhead Tricep Extension (Cable)2AMRAP@10
6Tricep Pushdown (Cable)28 reps@10
7One Arm Lateral Raise (Cable)3AMRAP@10
#ExerciseSetsRepsLoad
1Single Arm Iso Row28 reps@10
2Lat Pulldown (Close Grip)2AMRAP@10
3Standing Pullover (Cable)2AMRAP@10
4T-Bar Row38 reps@10
5Bicep Curl (Cable)2AMRAP@10
6Reverse Pec Deck2AMRAP@10
7Incline Curl (Dumbbell)2AMRAP@10
#ExerciseSetsRepsLoad
1Deadlift (Barbell)16 reps
23 reps
11 rep
2Hack Squat28 reps@10
3Leg Curl2AMRAP@10
4Leg Extension2AMRAP@10
5Hip Adductor (Machine)212 reps@10
6Calf Raise (Leg Press)2AMRAP@10
7Seated Calf Raise28 reps@10
8Abs Crunch (Weighted)215 reps@10
#ExerciseSetsRepsLoad
1Bench Press (Barbell)44 reps@10
2Incline Bench Press (Dumbbell)28 reps@10
3Pec Deck (Machine)3AMRAP@10
4Lateral Raise (Dumbbell)210 reps@10
5Overhead Tricep Extension (Cable)2AMRAP@10
6Tricep Pushdown (Cable)28 reps@10
7One Arm Lateral Raise (Cable)3AMRAP@10

Weeks 2–8 are in the app

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

Common questions

Yes, MassBuilder is completely free to follow on Boostcamp. Download the app on iOS or Android, find the program, and start your first workout immediately. All 8 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 70 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.

MassBuilder is structured around 6 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 8 weeks. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.

MassBuilder 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
1,000+ 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