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Cultivating The Mass In Your Ass
IntermediateFree

Cultivating The Mass In Your Ass

Oh yeah.

Simon B.
Simon B.· Mar 2026
iOS & Android

Overview

Length
8 weeks
Days / week
4 days
Level
Intermediate
Goal
Women's
Equipment
Full Gym
Session length
70 min
Get thick. Get swole.

Who it's for

Intermediate athletes ready for a structured program
Athletes focused on women's
Athletes who can train 4 days per week
Athletes with access to a full gym (barbells, dumbbells, cables, and machines)

Muscle engagement

Front
Back
Upper Back
10.4%
Glutes
10.4%
Hamstrings
8.7%
Quadriceps
8.7%
Front Delts
7.8%
Abs
7.8%
Lats
7.8%
Chest
6.9%
Triceps
6.9%
Adductors
6.1%
Biceps
5.2%
Rear Delts
4.3%
Middle Delts
3.5%
Forearms
2.6%
Calves
1.7%
Lower Back
0.9%
Cardio
0.3%
Week 1 Workouts
#ExerciseSetsReps
1Incline Bench Press (Dumbbell)510 reps
2Lying Rear Lateral Raise510 reps
3Decline Bench Press (Dumbbell)510 reps
4Lateral Raise (Dumbbell)510 reps
5Tricep Extension (Cable)510 reps
6Cable Crunch515 reps
7Cable Crossover510 reps
8Rear Delt Fly (Cable)510 reps
9Serratus punch520 reps
10Shoulder Press (Machine)515 reps
#ExerciseSetsReps
1Hip Thrust (Barbell)510 reps
2Side Bend (Dumbbell)510 reps
3Reverse Lunge (Dumbbell)510 reps
4Hip Adductor (Machine)510 reps
5Calf Raise (Machine)510 reps
6Leg Extension510 reps
7Glute Kickback515 reps
8Leg Curl510 reps
9Pull Through (Cable)515 reps
#ExerciseSetsReps
1Wide Grip Pull-Up515 reps
2Cable Crunch515 reps
3Incline Bicep Curl510 reps
4Side Bend (Dumbbell)515 reps
5Standing Pullover (Cable)515 reps
6Bicep Curl (Cable)510 reps
7Wide Grip Lat Pulldown512 reps
8Seated Row (Cable)515 reps
9T-Bar Row510 reps
#ExerciseSetsReps
1Jefferson Curl510 reps
2Lateral Lunge (Weighted)515 reps
3Reverse Lunge (Dumbbell)515 reps
4Kettlebell Swing515 reps
5Pull Through (Cable)510 reps
6Stair Climber120 min
7Hip Adductor (Machine)510 reps

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, Cultivating The Mass In Your Ass 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.

Cultivating The Mass In Your Ass 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 8 weeks. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.

Cultivating The Mass In Your Ass 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