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SculptFire 12 - 4 Days Split
IntermediateFree

SculptFire 12 - 4 Days Split

Unlock your strength with Grok AI :Forge a Lean, Chiseled Physique with Abs That Pop"

LOST ARC primes
LOST ARC primes· Sep 2025
2athletes running this program
iOS & Android

Overview

Length
12 weeks
Days / week
4 days
Level
Intermediate
Goal
Women's, Muscle
Equipment
Full Gym
Session length
60 min
SculptFire 12 is a 12-week hypertrophy program designed for intermediate gym-goers aiming to build lean, sculpted muscle mass while carving visible abs. Tailored for busy professionals, this 4-day Upper/Lower split trains each major muscle group (chest, back, shoulders, arms, legs, core) twice weekly for optimal growth, backed by hypertrophy research (10-20 sets/week per group). It leverages progressive overload, drop sets (Weeks 5-12), and supersets (Weeks 9-12) to maximize muscle fiber recruitment and metabolic stress, promoting size and definition. The program integrates direct core work (4x/week, including optional Abs Finishers) to tighten the midsection, complemented by two weekly badminton sessions for cardio and fat loss (targeting 10-15% body fat for abs visibility). Ideal for a 33-year-old male (68.5 kg, 176 cm, regular lifter), SculptFire 12 starts with conservative weights (e.g., 35 kg bench, 65-70 kg deadlift) to ensure form and progression (+5-10% weight every 1-2 weeks). It balances compound lifts (e.g., squats, deadlifts, bench press) for overall mass with isolation moves (e.g., curls, abs) for detail, fitting a working schedule (Mon/Tue/Thu/Fri). Nutrition guidance emphasizes a slight calorie surplus (2,500-2,800 kcal/day, 110-150g protein) to fuel gains while keeping lean. The program progresses through three phases: Foundation (Weeks 1-4), Hypertrophy Build (Weeks 5-8 with drop sets), and Peak/Refine (Weeks 9-12 with supersets), ending with a deload for recovery. Trackable in Boostcamp, SculptFire 12 delivers measurable results—expect 2-4 kg lean mass gain, enhanced arm/chest size, and defined abs with consistent diet and effort. Workout Duration Each Session: 45-60 minutes (including 5-10 min warm-up: light cardio + dynamic stretches; 5 min cool-down: static stretches). Breakdown: Upper A/B: ~45-55 min (6 exercises, 3 sets, 60-90 sec rest; +10 min if Abs Finisher added). Lower A/B: ~50-60 min (6 exercises, 3 sets, 60-90 sec rest; abs included). Weeks 9-12: Supersets save ~5-10 min despite added intensity. Weekly Commitment: ~3-4 hours gym + 1-2 hours badminton (2x/week, ~45-60 min each). Focus of Training Primary Focus: Hypertrophy (muscle building) for lean, sculpted muscle mass with emphasis on visible abs. Secondary Focus: Functional strength (via compounds like deadlifts, squats) and aesthetics (core, arm definition). Badminton supports athletic conditioning and fat loss, enhancing abs reveal without compromising mass gains. Difficulty Level Intermediate: Designed for regular gym-goers with 6+ months of lifting experience (like you, with solid lifts: 40 kg bench x6, 70 kg deadlift x8). Assumes familiarity with compound lifts and ability to handle moderate weights with good form. Why Intermediate: Requires knowledge of exercises (e.g., bench press, pull-ups, deadlifts) and ability to track progression in Boostcamp. Drop sets (Weeks 5-12) and supersets (Weeks 9-12) add intensity, challenging but manageable for your experie

Who it's for

Intermediate athletes ready for a structured program
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
Abs
17.9%
Hamstrings
8.3%
Quadriceps
8.1%
Triceps
7.8%
Front Delts
7%
Upper Back
6.9%
Biceps
6.6%
Glutes
6.6%
Middle Delts
6.1%
Lats
6%
Chest
5.3%
Calves
4.1%
Rear Delts
2.9%
Forearms
2.9%
Lower Back
2.4%
Adductors
0.8%
Abductors
0.4%
Week 1 Workouts
#ExerciseSetsRepsLoad
1Bench Press (Barbell)38–12 reps@8.5
2Bent Over Row (Barbell)38–12 reps@7.5
3Seated Shoulder Press (Dumbbell)38–12 reps@7
4Lat Pulldown18–12 reps@6.5
28–12 reps@6.5
1
5Tricep Pushdown (Cable)310–15 reps@8
6Bicep Curl (EZ Bar)310–15 reps@6.5
Superset
7AHanging Leg Raise320 reps@6.5
7BPlank32 min@8
7CRussian Twist (Dumbbell)320 reps@8
#ExerciseSetsRepsLoad
1Squat (Barbell)38–12 reps@8
2Romanian Deadlift (Barbell)38–12 reps@7.5
3Leg Press (45 Degrees)310–12 reps@7
4Calf Raise (Machine)312–15 reps@7
5Cable Crunch312–15 reps@8
6Leg Raise (Captain's Chair)315–20 reps@8
#ExerciseSetsRepsLoad
1Incline Bench Press (Dumbbell)38–12 reps@8.5
2Seated Row (Cable)38–12 reps@7
3Lateral Raise (Dumbbell)310–15 reps@8
4Dip (Bodyweight)38–12 reps@8
5Hammer Curl310–15 reps@7
6Reverse Wrist Curl (Barbell)310–15 reps@6.5
#ExerciseSetsRepsLoad
1Deadlift (Barbell)38–12 reps@8
2Bulgarian Split Squat (Dumbbell)310–12 reps@8
3Leg Curl310–12 reps@7.5
4Calf Raise (Machine)312–15 reps@7
5Rear Delt Fly (Dumbbell)312–15 reps@7
6One Arm Lateral Raise (Cable)312–15 reps
Superset
7APlank12 min@7
12 min@7.5
12 min@6.5
7BRussian Twist (Dumbbell)312–15 reps@7
7CHanging Leg Raise315–20 reps@7

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, SculptFire 12 - 4 Days Split 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 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.

SculptFire 12 - 4 Days Split 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 12 weeks. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.

SculptFire 12 - 4 Days Split 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
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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.
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