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Simple U/L
IntermediateFree

Simple U/L

Precision Hypertrophy: Muscle Twice a Week, Volume Just Right.

Carl Karlsson
Carl Karlsson· Jun 2025
1athletes running this program
iOS & Android

Overview

Length
12 weeks
Days / week
4 days
Level
Intermediate
Goal
Muscle, Women's
Equipment
Full Gym
Session length
60 min
This program is designed to maximize hypertrophy and minimize fatigue by combining: - High frequency (each muscle group trained 2x per week) - Low to moderate volume (2 high-effort sets per exercise) - Efficient session structure that supports recovery and strength retention from session to session. By targeting muscles multiple times per week with manageable workloads, this split stimulates consistent growth signals without overwhelming your recovery capacity. Whether you're cutting to get lean or simply looking for a smart, sustainable hypertrophy-focused routine, this program balances intensity, frequency, and recovery to keep you progressing without burnout.

Who it's for

Intermediate athletes ready for a structured program
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
Hamstrings
10.6%
Quadriceps
10.6%
Upper Back
8.5%
Glutes
8.5%
Front Delts
7.4%
Chest
6.4%
Triceps
6.4%
Rear Delts
6.4%
Lats
6.4%
Abs
6.4%
Biceps
5.3%
Middle Delts
4.3%
Adductors
4.3%
Calves
4.3%
Lower Back
2.1%
Forearms
1.1%
Abductors
1.1%
Week 1 Workouts
#ExerciseSetsRepsLoad
1Incline Bench Press (Smith Machine)26–8 reps@9
2Chest Fly (Machine)18–10 reps@9
18–10 reps@10
3Lateral Raise (Machine)18–12 reps@9
18–12 reps@10
4Lat Pulldown18–10 reps@9
18–10 reps@10
5Single Arm Rear Delt Fly (Cable)18–10 reps@9
18–10 reps@10
6Single Arm Cross Body Triceps Extension18–12 reps@9
18–12 reps@10
7Seated Tricep Pushdowns18–10 reps@9
18–10 reps@10
8Mundy Curl28–10 reps@9
#ExerciseSetsRepsLoad
1Romanian Deadlift (Barbell)26–8 reps@9
2Hip Adductor (Machine)18–10 reps@9
18–10 reps@10
3Bulgarian Split Squat (Dumbbell)28–10 reps@9
4Seated Hamstring Curl18–10 reps@9
18–10 reps@10
5Calf Raise (Machine)18–10 reps@9
18–10 reps@10
6Hanging Leg Raise28–10 reps
#ExerciseSetsRepsLoad
1Chest Press (Machine)16–8 reps@9
16–8 reps@10
2T-Bar Row16–8 reps@9
16–8 reps@10
3Single Arm Row (Cable)18–10 reps@9
18–10 reps@10
4Lateral Raise (Cable)18–10 reps@9
18–10 reps@10
5Single Arm Rear Delt Cable Fly18–10 reps@9
18–10 reps@10
6V-Handle Tricep Pushdown (Cable)18–10 reps@9
18–10 reps@10
7Mundy Curl28–10 reps@9
8Hammer Curl (Dumbbell)18–10 reps@9
18–10 reps@10
#ExerciseSetsRepsLoad
1Leg Press26–8 reps@9
2Hip Adductor (Machine)18–10 reps@9
18–10 reps@10
3Leg Extension18–10 reps@9
18–10 reps@10
4Romanian Deadlift (Barbell)26–8 reps@9
5Standing Calf Raise18–10 reps@9
18–10 reps@10
6Cable Crunch18–10 reps@9
18–10 reps@10

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, Simple U/L 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.

Simple U/L 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.

Simple U/L 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.
Free on iOS & Android