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531 5x5 FSL
IntermediateFree

531 5x5 FSL

· Apr 2026
iOS & Android

Overview

Length
3 weeks
Days / week
4 days
Level
Intermediate
Goal
Strength, Muscle
Equipment
Full Gym
Session length
60 min
Push new strength built after 5s pro BBB. Deload one week before hand and do one cycle then back to 5s pro BBB.

Who it's for

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

Muscle engagement

Front
Back
Quadriceps
13.3%
Triceps
10.1%
Abs
9.6%
Glutes
8.8%
Front Delts
8.2%
Middle Delts
7.2%
Chest
7.2%
Lats
6.5%
Biceps
6.5%
Hamstrings
6.4%
Upper Back
5.1%
Calves
3.9%
Rear Delts
2.3%
Lower Back
2.1%
Adductors
2.1%
Forearms
0.8%
Week 1 Workouts
#ExerciseSetsRepsLoad
1Overhead Press (Barbell)15 reps65%
15 reps75%
2Overhead Press (Barbell)1AMRAP85%
3Overhead Press (Barbell)55 reps65%
4Lat Pulldown510 reps
5Lateral Raise (Dumbbell)310 reps
6Bicep Curl (Barbell)312–15 reps
7French Press312–15 reps
#ExerciseSetsRepsLoad
1Deadlift (Barbell)15 reps65%
15 reps75%
2Deadlift (Barbell)1AMRAP85%
3Deadlift (Barbell)55 reps65%
4Single Leg Press310 reps
5Standing Calf Raise36–8 reps
6Seated Calf Raise310–12 reps
7Abs Crunch (Weighted)510–20 reps
#ExerciseSetsRepsLoad
1Bench Press (Barbell)15 reps65%
15 reps75%
2Bench Press (Barbell)1AMRAP85%
3Bench Press (Barbell)55 reps65%
4Lat Pulldown510 reps
5Rear Delt Fly (Machine)310 reps
6Chest Fly (Cable)310 reps
7Hammer Curl310 reps
8V-Handle Tricep Pushdown (Cable)310 reps
#ExerciseSetsRepsLoad
1Squat (Barbell)15 reps65%
15 reps75%
2Squat (Barbell)1AMRAP85%
3Squat (Barbell)55 reps65%
4Leg Extension310 reps
5Abs Crunch (Weighted)510–20 reps

Weeks 2–3 are in the app

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

Common questions

Yes, 531 5x5 FSL is completely free to follow on Boostcamp. Download the app on iOS or Android, find the program, and start your first workout immediately. All 3 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.

531 5x5 FSL 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 3 weeks. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.

531 5x5 FSL 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