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Japo jack
All LevelsFree

Japo jack

building from zero

Jonatan Sigot
Jonatan Sigot· Sep 2025
iOS & Android

Overview

Length
12 weeks
Days / week
4 days
Level
Beginner, Intermediate, Advanced
Goal
Muscle, Strength
Equipment
Full Gym
Session length
60 min
a program to be use in case of starting from zero

Who it's for

Athletes of all experience levels
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
Glutes
10.3%
Lats
9.5%
Upper Back
9.5%
Biceps
9.5%
Quadriceps
9.5%
Hamstrings
9.5%
Front Delts
8.7%
Triceps
7.9%
Middle Delts
6.3%
Chest
4.8%
Abs
4.8%
Forearms
2.4%
Rear Delts
2.4%
Lower Back
2.4%
Adductors
1.6%
Abductors
0.8%
Week 1 Workouts
#ExerciseSetsRepsLoad
1Bench Press (Dumbbell)210 reps@8
2Lat Pulldown310 reps@8
3Seated Shoulder Press (Dumbbell)210 reps@8
4Chest Supported Row (Machine)310 reps@8
5Incline Curl (Dumbbell)210 reps@8
6Standing Overhead Cable Extension210 reps@8
7Lateral Raise (Dumbbell)310 reps@8
#ExerciseSetsRepsLoad
1High Bar Squat (Barbell)210 reps@8
2Romanian Deadlift (Barbell)210 reps@8
3Leg Press210 reps@9
4Split Squat (Smith Machine)210 reps@8
5Hanging Leg Raise210 reps
#ExerciseSetsRepsLoad
1Bench Press (Barbell)210 reps@8
2Lat Pulldown310 reps@8
3Incline Bench Press (Dumbbell)210 reps@8
4Seated Row (Cable)310 reps@8
5Hammer Curl (Dumbbell)210 reps@8
6Tricep Pushdown (Cable)210 reps@8
#ExerciseSetsRepsLoad
1High Bar Squat (Barbell)210 reps@8
2Lateral Raise (Cable)310 reps@8
3Back Extension210 reps
4Preacher Curl (Barbell)210 reps@8
5Standing Overhead Cable Extension210 reps@8
6Bulgarian Split Squat (Barbell)210 reps@8

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, Japo jack 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.

Japo jack 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.

Japo jack 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