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Arms & Chest Architect
Intermediate–AdvancedFree

Arms & Chest Architect

Sculpt a powerful upper body. Forge bigger arms and a fuller chest with this targeted 5-day hypertrophy plan.

Jack P.
Jack P.· May 2025
4athletes running this program
iOS & Android

Overview

Length
12 weeks
Days / week
5 days
Level
Intermediate, Advanced
Goal
Women's, Muscle
Equipment
Full Gym
Session length
70 min
This 12-week program is meticulously designed for the intermediate lifter who aims to significantly increase upper body muscle mass. There is a pronounced focus on developing fuller, more muscular arms and a well-defined, larger chest, addressing common areas of concern for individuals with a leaner build. The "Arm & Chest Architect" prioritizes these areas through strategic exercise selection, optimal training volume, and intelligent frequency, ensuring they receive ample stimulus for growth. Individuals with a taller, leaner frame may sometimes find it more challenging to add noticeable mass to their arms and chest, and this program directly addresses that by dedicating significant training resources to these areas. The core mechanism for achieving this is hypertrophy training. This method emphasizes the use of moderate weights lifted for a moderate to higher number of repetitions, typically in the 6-15 rep range. This approach is designed to maximize the muscle's time under tension and induce metabolic stress, both of which are key factors in promoting an increase in muscle fiber size. The program will incorporate a blend of heavy compound lifts, such as the Bench Press, Overhead Press, and various Rows, which are fundamental for building overall foundational strength and muscular size. These will be complemented by targeted isolation exercises, including different types of Curls, Extensions, and Flyes, to directly stimulate and sculpt the biceps, triceps, and pectoral muscles, ensuring comprehensive development. The program is structured as a 5-day split, specifically an "Upper Body Focus" split, drawing inspiration from effective bodybuilding principles. This structure allows for dedicated training days for major muscle groups while uniquely providing two direct arm training sessions per week, in addition to significant indirect arm work occurring during chest, back, and shoulder training days. This increased frequency and volume for the arms directly caters to the goal of enhancing arm size, and is carefully balanced to prevent the counterproductive effects of overtraining. Overtraining is mitigated through adequate rest, managed weekly training volume (10-20+ sets per muscle group), the Double Progression method, and emphasis on proper nutrition, sleep, and recovery. The availability of a full gym is leveraged for diverse exercises. By the conclusion of this 12-week program, the lifter should expect to see noticeable improvements in upper body muscularity, particularly in the arms and chest. Alongside these aesthetic changes, an increase in strength across various lifts and a better understanding of how to train effectively for continued muscle growth as an intermediate lifter are anticipated outcomes. Consistent emphasis on correct exercise form will also enhance lifting proficiency and contribute to a safer training experience.

Who it's for

Athletes at the Intermediate–Advanced level
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
Triceps
15%
Biceps
12%
Upper Back
10.3%
Chest
9.5%
Front Delts
8.7%
Abs
7.3%
Hamstrings
6.1%
Lats
5.2%
Middle Delts
4.8%
Quadriceps
4.6%
Calves
4.2%
Glutes
3.7%
Rear Delts
3.7%
Forearms
1.9%
Lower Back
1.4%
Adductors
1%
Abductors
0.4%
Week 1 Workouts
#ExerciseSetsRepsLoad
1Bent Over Row (Barbell)46–10 reps@7–9
2Wide Grip Lat Pulldown38–12 reps@7–9
3Seated Row (Cable)38–12 reps@7–9
4Face Pull312–15 reps@7–9
5Bicep Curl (Barbell)38–12 reps@7–9
6Hammer Curl310–15 reps@7–9
#ExerciseSetsRepsLoad
1Bench Press (Barbell)46–10 reps@7–9
2Incline Bench Press (Dumbbell)38–12 reps@7–9
3Dip (Bodyweight)3AMRAP@7–9
4Chest Fly (Cable)310–15 reps@7–9
5Tricep Pushdown (Cable)410–15 reps@7–9
6Overhead Extension (Dumbbell)310–15 reps@7–9
#ExerciseSetsRepsLoad
1Squat (Barbell)46–10 reps@7–9
2Romanian Deadlift (Barbell)38–12 reps@7–9
3Leg Press310–15 reps@7–9
4Lying Leg Curl310–15 reps@7–9
5Standing Calf Raise410–20 reps@7–9
6Plank30.5–1.5 min@7–9
7Cable Crunch310–15 reps@7–9
#ExerciseSetsRepsLoad
1Overhead Press (Barbell)46–10 reps@7–9
2Lateral Raise (Dumbbell)410–15 reps@7–9
3Rear Delt Fly (Dumbbell)312–15 reps@7–9
4Shrug (Barbell)38–12 reps@7–9
5Front Raise210–15 reps@7–9
#ExerciseSetsRepsLoad
1Bench Press (Close Grip)46–10 reps@7–9
2Bicep Curl (Dumbbell)48–12 reps@7–9
3Skull Crusher38–12 reps@7–9
4Preacher Curl (Barbell)310–15 reps@7–9
5V-Handle Tricep Pushdown (Cable)310–15 reps@7–9
6Concentration Curl310–20 reps@7–9
7Decline Crunch310–20 reps@7–9
8Seated Calf Raise312–20 reps@7–9

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, Arms & Chest Architect 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.

Arms & Chest Architect 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.

Arms & Chest Architect 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

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