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Sigma
Intermediate–AdvancedFree

Sigma

A 3-day plan: Back & Biceps + Abs, Chest & Triceps + Abs, Legs & Shoulders + Abs. Builds strength, size, and balance in 1h 20m per session.

VALENTIN Francois
VALENTIN Francois· Feb 2025
1athletes running this program
iOS & Android

Overview

Length
1 week
Days / week
3 days
Level
Intermediate, Advanced
Goal
Athletics, Women's, Bodyweight Fitness, Muscle, Strength
Equipment
Full Gym
Session length
90 min
Purpose of the 3-Day Workout Program This 3-day workout split is designed to build muscle strength, size, and endurance while maintaining a balanced and functional physique. It pairs complementary muscle groups and incorporates daily core training for stability and aesthetics. The goal is to maximize hypertrophy (muscle growth), enhance strength, and improve overall performance in an efficient and structured way. --- Program Breakdown Day 1: Back & Biceps + Abs Strengthens the posterior chain, improving posture and pulling power. Biceps work as secondary muscles, maximizing efficiency. A stronger back enhances overall athleticism and prevents injuries. Core training improves spinal stability, aiding in heavier lifts. Day 2: Chest & Triceps + Abs Focuses on pushing strength, building a well-defined chest and powerful triceps. Triceps assist in pressing movements, leading to strength gains. Enhances upper body strength for better performance in pressing exercises. The abs routine improves core endurance and posture. Day 3: Legs & Shoulders + Abs Builds a solid lower body foundation, enhancing power, balance, and athleticism. Strengthens shoulders without overworking them after chest day. Core training reinforces stability and injury prevention. --- Key Benefits ✅ Balanced Muscle Growth – Ensures equal development of all major muscle groups. ✅ Efficient Recovery – Alternating muscle groups allows for proper rest and maximum gains. ✅ Increased Strength & Endurance – Compound and isolation movements improve power and definition. ✅ Time-Efficient – 1-hour main workout + 20-minute abs keeps it effective and manageable. ✅ Progressive Overload – Encourages strength progression for continuous muscle growth. --- Conclusion This structured 3-day program efficiently targets all muscle groups while prioritizing core stability, strength, and endurance. Perfect for those looking to build muscle, improve performance, and stay consistent with a focused and effective routine.

Who it's for

Athletes at the Intermediate–Advanced level
Athletes focused on gaining both size and strength
Athletes who can train 3 days per week
Athletes with access to a full gym (barbells, dumbbells, cables, and machines)

Muscle engagement

Front
Back
Abs
13.1%
Triceps
11.5%
Upper Back
10.2%
Chest
10%
Front Delts
7.6%
Biceps
7.5%
Quadriceps
6.2%
Lats
6.1%
Hamstrings
5.7%
Glutes
5.3%
Rear Delts
4.8%
Middle Delts
4.4%
Lower Back
2%
Calves
1.9%
Forearms
1.8%
Adductors
1.5%
Abductors
0.4%
Week 1 Workouts
#ExerciseSetsRepsLoad
1Bench Press (Barbell)48 reps@8
2Incline Bench Press (Dumbbell)310 reps@8
3Dip (Bodyweight)310 reps@8
4Chest Fly (Dumbbell)312 reps@8
5Bench Press (Close Grip)310 reps@8
6Skull Crusher (Dumbbell)310 reps@8
7Tricep Rope Push Down (Cable)315 reps@8
8Push Up120 reps@10
Superset
9ALying Leg Raise120 reps@8
9BBicycle Crunch120 reps@8
9CPlank11 min@8
9DRussian Twist120 reps@8
9EAbs Crunch (Bodyweight)120 reps@8
9FReverse Abs Crunch (Bodyweight)120 reps@8
#ExerciseSetsRepsLoad
1Squat (Barbell)48 reps@8
2Romanian Deadlift (Barbell)410 reps@8
3Leg Press312 reps@8
4Seated Calf Raise315 reps@8
5Seated Shoulder Press (Dumbbell)48 reps@8
6Lateral Raise (Dumbbell)312 reps@8
7Rear Delt Fly (Dumbbell)315 reps@8
8Walking Lunge215 reps@10
9Face Pull215 reps@10
Superset
10ALying Leg Raise120 reps@8
10BBicycle Crunch120 reps@8
10CPlank11 min@8
10DRussian Twist120 reps@8
10EAbs Crunch (Bodyweight)120 reps@8
10FReverse Abs Crunch (Bodyweight)120 reps@8
#ExerciseSetsRepsLoad
1Lat Pulldown410 reps@8
2Barbell Row48 reps@8
3Seated Row (Cable)310 reps@8
4Face Pull312 reps@8
5Bicep Curl (Barbell)310 reps@8
6Hammer Curl310 reps@8
7Concentration Curl212 reps@8
8Dead Hang11 rep@8
9Bicep Curl (Cable)115 reps@10
Superset
10ALying Leg Raise120 reps@8
10BBicycle Crunch120 reps@8
10CPlank11 min@8
10DRussian Twist120 reps@8
10EOblique Crunch120 reps@8
10FReverse Abs Crunch (Bodyweight)120 reps@8

Common questions

Yes, Sigma is completely free to follow on Boostcamp. Download the app on iOS or Android, find the program, and start your first workout immediately. All 1 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 90 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.

Sigma is structured around 3 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 1 week. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.

Sigma 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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Advanced analyticsTrack volume, intensity, and 1RM trends to see exactly how your training is evolving.
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