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From Flap Jacks to Thick Stacks
Intermediate–AdvancedFree

From Flap Jacks to Thick Stacks

A strength training program for intermediate to advanced lifters focused on glute and leg development through foundational compound movements.

Logan Poole
Logan Poole· Apr 2025
14athletes running this program
iOS & Android

Overview

Length
10 weeks
Days / week
4 days
Level
Intermediate, Advanced
Goal
Muscle, Athletics
Equipment
Full Gym
Session length
60 min
Flap Jacks 2 Thick Stacks is a specialized fitness program designed to help individuals build bigger, stronger glutes and well-developed leg muscles. Through a structured combination of resistance training, progressive overload, and targeted lower-body exercises, this program focuses on enhancing lower-body strength, size, and shape. Whether you're looking to grow those glutes, stack on muscle, or simply level up your leg-day game, this program serves up results—thick and strong, just like the name suggests.

Who it's for

Athletes at the Intermediate–Advanced level
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
Glutes
14.8%
Hamstrings
12.8%
Abs
11.7%
Quadriceps
11.1%
Upper Back
8.6%
Triceps
7.9%
Biceps
6%
Middle Delts
5.4%
Front Delts
5.2%
Lats
5.2%
Lower Back
2.9%
Forearms
2.7%
Adductors
2.6%
Rear Delts
2%
Chest
1.1%
Week 1 Workouts
#ExerciseSetsRepsIntensity
1Squat (Barbell)25 reps@10
2Squat (Barbell)1AMRAP@10
3Deadlift (Barbell)25 reps@10
4Deadlift (Barbell)1AMRAP@10
5Hip Thrust (Barbell)38 reps@9
6Bulgarian Split Squat Smith Machine310 reps@8
7Side Crunch (Cable)312 reps@10
8Hanging Leg Raise3AMRAP@10
#ExerciseSetsRepsIntensity
1Bench Press (Barbell)25 reps@7
2Bench Press (Barbell)1AMRAP@7
3Pull-Up (Weighted)25 reps@7
4Pull-Up (Weighted)1AMRAP@7
5Pendlay Row310 reps@9
6Arnold Press310 reps@8
Superset
7ALateral Raise (Cable)312 reps@9
7BSkull Crusher (Barbell)312 reps@9
Superset
8ATricep Pushdown (Cable)312 reps@10
8BBicep Curl (Cable)312 reps@10
#ExerciseSetsRepsIntensity
1Sumo Deadlift (Barbell)38 reps@7
2Squat (Barbell)38 reps@7
3Romanian Deadlift (Barbell)310 reps@8
Superset
4ARomanian Deadlift (Dumbbell)312 reps@9
4BPull Through (Cable)312 reps@9
5Goblet Squat312 reps@8
6Glute Kickback (Cable)315 reps@10
7Side Crunch (Cable)312 reps@10
8Hanging Leg Raise3AMRAP@10
#ExerciseSetsRepsIntensity
1Overhead Press (Dumbbell)38 reps@7
2Lat Pulldown38 reps@7
3Seated Row (Cable)310 reps@8
4Face Pull312 reps@9
Superset
5ABicep Curl (Dumbbell)312 reps@8
5BTricep Pushdown (Cable)312 reps@8
Superset
6ALateral Raise (Cable)315 reps@10
6BPreacher Curl (Barbell)315 reps@10

Weeks 2–10 are in the app

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

Common questions

Yes, From Flap Jacks to Thick Stacks is completely free to follow on Boostcamp. Download the app on iOS or Android, find the program, and start your first workout immediately. All 10 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.

From Flap Jacks to Thick Stacks 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 10 weeks. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.

From Flap Jacks to Thick Stacks 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
11,000+ 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.
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