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Kaizen88 4 Day Split
IntermediateFree

Kaizen88 4 Day Split

Unlock your strength and sculpt your physique in just 4 days a week—transform your workouts and embrace the journey to your best self.

Scottie  L.
Scottie L.· Apr 2026
Free on iOS & Android

Overview

Length
1 week
Days / week
4 days
Level
Intermediate
Goal
Muscle, Strength
Equipment
Full Gym
Session length
50 min
Unlock your potential with the Kaizen88 4 Day Split, a focused program designed to build muscle and strength over just one week. Each session, lasting around 50 minutes, targets specific muscle groups through a variety of exercises, including dumbbell presses, cable rows, and leg presses. This intermediate-level routine requires access to a full gym, ensuring you have the equipment needed to maximize your gains. Get ready to challenge yourself and elevate your training to the next level!

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
Front Delts
12.4%
Upper Back
12.4%
Triceps
10.3%
Chest
9.6%
Abs
9.3%
Lats
8.2%
Biceps
8.2%
Middle Delts
6.9%
Hamstrings
5.2%
Quadriceps
4.1%
Glutes
4.1%
Calves
2.7%
Rear Delts
2.4%
Forearms
2.1%
Abductors
1%
Lower Back
1%
Week 1 Workouts
#ExerciseSetsReps
1Incline Bench Press (Dumbbell)38 reps
2Seated Overhead Press (Dumbbell)310 reps
3Incline Chest Fly (Dumbbell)315 reps
4Lateral Raise (Cable)420 reps
5Tricep Pushdown (Cable)312 reps
6Chest Fly (Cable)220 reps
7Hanging Leg Raise315 reps
#ExerciseSetsReps
1Pull-Up (Bodyweight)35 reps
2Bent Over Row (Barbell)310 reps
3Lat Pulldown312 reps
4Face Pull320 reps
5Preacher Curl (EZ Bar)312 reps
6Cable Crunch320 reps
#ExerciseSetsReps
1Leg Press (45 Degrees)38 reps
2Hip Thrust (Barbell)310 reps
3Leg Extension315 reps
4Lying Leg Curl312 reps
5Standing Calf Raise420 reps
6Plank31 min
#ExerciseSetsReps
1Incline Bench Press (Dumbbell)312 reps
2Seated Row (Cable)312 reps
3Chest Fly (Cable)315 reps
4Standing Shoulder Press (Dumbbell)312 reps
5Hammer Curl (Cable)312 reps
6Russian Twist (Dumbbell)320 reps

Common questions

Yes, Kaizen88 4 Day Split is completely free to follow on Boostcamp. Download the app on iOS or Android, find the program, and start your first workout immediately. All 1 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 50 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.

Kaizen88 4 Day Split 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 1 week. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.

Kaizen88 4 Day Split 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
Auto-progressionWeights and targets update automatically based on how you perform.
Training logLog every set and track your weights automatically each session.
Progress trackingSee your strength gains over weeks and months with built-in analytics.
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