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JX3 tier 3
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JX3 tier 3

Tier three of JX3

derek H.
derek H.· Jun 2025
1athletes running this program
iOS & Android

Overview

Length
18 weeks
Days / week
6 days
Level
Advanced
Goal
Muscle
Equipment
Full Gym
Session length
90 min
Build an X-frame

Who it's for

Advanced athletes looking to push past plateaus
Athletes focused on building muscle size
Athletes who can train 6 days per week
Athletes with access to a full gym (barbells, dumbbells, cables, and machines)

Muscle engagement

Front
Back
Upper Back
10.9%
Biceps
10%
Lats
9%
Hamstrings
8.1%
Triceps
8%
Chest
7.6%
Front Delts
7.3%
Middle Delts
6.9%
Quadriceps
6.2%
Rear Delts
5.2%
Abs
5%
Calves
4.4%
Glutes
3.5%
Forearms
3.5%
Adductors
3.2%
Lower Back
0.9%
Abductors
0.3%
Week 1 Workouts
#ExerciseSetsRepsLoad
1Lateral Raise (Dumbbell)410–15 reps@8
2Bench Press (Dumbbell)38–12 reps@8
3Incline Chest Press (Machine)38–12 reps@8
4Pec Deck (Machine)210–15 reps@8
5Reverse Pec Deck312–20 reps@8
6Tricep Pushdown (Cable)412–20 reps@8
7Abs Crunch (Bodyweight)410–15 reps@10
#ExerciseSetsRepsLoad
1Lat Pulldown38–12 reps@8
2High Row28–12 reps@8
3Seated Row (Cable)310–15 reps@8
4Rear Delt Row212–20 reps@8
5Preacher Curl (Dumbbell)310–15 reps@8
6Hammer Curl (Cable)310–15 reps@8
7Reverse Wrist Curl (Dumbbell)212–15 reps@8
#ExerciseSetsRepsLoad
1Seated Hamstring Curl48–12 reps@8
2Squat (Barbell)28–12 reps@8
3Leg Press (45 Degrees)312–20 reps@8
4Hip Adductor (Machine)210–15 reps@8
5Leg Extension310–15 reps@8
6Standing Calf Raise412–16 reps@8
#ExerciseSetsRepsLoad
1Lateral Raise (Cable)410–15 reps@8
2Shoulder Press (Plate Loaded)38–12 reps@8
3Close Grip Bench Press (Smith Machine)38–12 reps@8
4Rear Delt Fly (Cable)310–15 reps@8
5Chest Fly (Cable)310–15 reps@8
6Overhead Tricep Extension (Cable)410–15 reps@8
7Abs Crunch (Bodyweight)410–15 reps@8
#ExerciseSetsRepsLoad
1Lat Pulldown (Close Grip)310–15 reps@8
2T-Bar Row38–12 reps@8
3Single Arm Row (Cable)28–12 reps@8
4Lat Pulldown212–20 reps@8
5Bicep Curl (Cable)310–15 reps@8
6Hammer Curl (Dumbbell)310–15 reps@8
7Wrist Curls212–15 reps@8
#ExerciseSetsRepsLoad
1Lying Leg Curl48–12 reps@8
2Romanian Deadlift (Barbell)28–12 reps@8
3Single Leg Press310–15 reps@8
4Hip Adductor (Machine)310–15 reps@8
5Standing Calf Raise46–10 reps

Weeks 2–18 are in the app

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

Common questions

Yes, JX3 tier 3 is completely free to follow on Boostcamp. Download the app on iOS or Android, find the program, and start your first workout immediately. All 18 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.

JX3 tier 3 is structured around 6 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 18 weeks. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.

JX3 tier 3 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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