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Massing phase
IntermediateFree

Massing phase

Optimized muscle building program

· Jun 2025
iOS & Android

Overview

Length
12 weeks
Days / week
5 days
Level
Intermediate
Goal
Muscle, Athletics, Women's
Equipment
Full Gym
Session length
70 min
To maximize hypertrophy and limit fatigue

Who it's for

Intermediate athletes ready for a structured program
Athletes focused on building muscle size
Athletes who can train 5 days per week
Athletes with access to a full gym (barbells, dumbbells, cables, and machines)

Muscle engagement

Front
Back
Lats
13.6%
Upper Back
12.2%
Triceps
11.8%
Chest
11.1%
Biceps
10.4%
Front Delts
10%
Middle Delts
9%
Hamstrings
6.5%
Quadriceps
5.4%
Glutes
3.6%
Abductors
2.2%
Rear Delts
1.4%
Forearms
1.1%
Lower Back
1.1%
Abs
0.7%
Week 1 Workouts
#ExerciseSetsRepsIntensity
1Incline Chest Press (Machine)10 reps@8.5–9
2Lateral Raise (Cable)20 reps
3Chest Supported Row (Machine)10 reps
4Pec Deck (Machine)10 reps
5Single Arm Row (Cable)20 reps
6Tricep Extension (Cable)10 reps
7Bicep Curl (Cable)10 reps
8JM Press10 reps
#ExerciseSetsReps
1Seated Hamstring Curl10 reps
2Leg Extension10 reps
3Leg Press (45 Degrees)10 reps
4Hip Abductor (Machine)10 reps
#ExerciseSetsReps
1Wide Grip Lat Pulldown20 reps
2Chest Supported Row (Machine)10 reps
3Single Arm Row (Cable)20 reps
4Tricep Extension (Cable)20 reps
5JM Press10 reps
#ExerciseSetsReps
1Incline Chest Press (Machine)10 reps
2Pec Deck (Machine)20 reps
3Lateral Raise (Cable)20 reps
4Shoulder Press (Machine)10 reps
5Bicep Curl (Cable)20 reps
#ExerciseSetsReps
1Seated Hamstring Curl10 reps
2Leg Extension10 reps
3Stiff Leg Deadlift10 reps

Weeks 2–12 are in the app

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

Common questions

Yes, Massing phase is completely free to follow on Boostcamp. Download the app on iOS or Android, find the program, and start your first workout immediately. All 12 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.

Massing phase is structured around 5 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 12 weeks. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.

Massing phase 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