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The King Engine (4 days, Full Body Variation)
Beginner–IntermediateFree

The King Engine (4 days, Full Body Variation)

Embrace becoming the strongest hero, and unleash ‘The King Engine’.

Jaron Z.
Jaron Z.· Jan 2026
3athletes running this program
Free on iOS & Android

Overview

Length
6 weeks
Days / week
4 days
Level
Beginner, Intermediate
Goal
Muscle, Women's
Equipment
Full Gym
Session length
70 min
4 day per week, upper body focused program. Decent amout of volume with high intensity. -Don't worry about trying to hit the top end of the rep ranges, just make sure your reps don't fall below the minimum rep range. -There should be some rep dropoff set to set. If your reps don't drop from the 1st set vs the last set, you're not training close enough to failure. -Each week try to add 5-10 pounds to compound lifts (2.5 pounds for isolations) and match reps from the previous week's session. OR beat your reps by 1 from the previous week's session, with the same weight from the previous week. -Note: *The first set of each exercise is the one you're trying to match/beat reps from the previous week. This is how you're going to gauge performance. -Matching subsequent sets isn't as important, although performance should be similar to the previous week's session. -If you're unable to match, or beat reps, stick with the same weight next week, until you can beat your reps; then repeat.

Who it's for

Beginners new to structured strength training
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
Upper Back
12.1%
Chest
11.1%
Triceps
10.9%
Front Delts
10.2%
Biceps
10%
Middle Delts
8.5%
Lats
8.3%
Hamstrings
5.5%
Quadriceps
5.5%
Abs
4.8%
Calves
4.2%
Forearms
3.5%
Glutes
3.5%
Abductors
1%
Lower Back
0.7%
Week 1 Workouts
#ExerciseSetsRepsLoad
1Barbell Row38–12 reps@8–10
2Lat Pulldown (Close Grip)38–12 reps@8–10
3Bicep Curl (Machine)48–12 reps@8–10
4Romanian Deadlift (Barbell)26–10 reps@8–10
5Standing Calf Raise310–20 reps@8–10
6Hanging Leg Raise3AMRAP@8–10
#ExerciseSetsRepsLoad
1Chest Fly (Machine)48–15 reps@8–10
2Tricep Rope Push Down (Cable)38–12 reps@8–10
3Dip (Bodyweight)38–15 reps@8–10
4Leg Press38–12 reps@8–10
5Seated Lateral Raise38–15 reps@8–10
6Cable Crunch3AMRAP@8–10
#ExerciseSetsRepsLoad
1Leg Extension310–20 reps@8–10
2Seated Anterior Delt Press (AD)312–20 reps@8–10
3Seated Lateral Raise38–15 reps@8–10
4Seated Wide-Grip Row (Cable)38–12 reps@8–10
5Incline Fly Press (Dumbbell)48–12 reps@8–10
Superset
6ATricep Rope Push Down (Cable)310–15 reps@8–10
6BFace Away Cable Curl310–15 reps@8–10
#ExerciseSetsRepsLoad
1Leg Curl38–12 reps@8–10
2Standing Calf Raise310–20 reps@8–10
3Chest Fly (Machine)38–15 reps@8–10
4Incline Bench Press (Barbell)28–12 reps@8–10
5Lat Pulldown38–12 reps@8–10
6Seated Lateral Raise38–15 reps@8–10
7Overhead Tricep Extension (Cable)310–15 reps@8–10
8Incline Curl (Dumbbell)38–12 reps@8–10
9Shrug (Barbell)48–15 reps@8–10

Weeks 2–6 are in the app

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

Common questions

Yes, The King Engine (4 days, Full Body Variation) is completely free to follow on Boostcamp. Download the app on iOS or Android, find the program, and start your first workout immediately. All 6 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 70 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.

The King Engine (4 days, Full Body Variation) 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 6 weeks. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.

The King Engine (4 days, Full Body Variation) 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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