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Upper/lower mass phase
IntermediateFree

Upper/lower mass phase

Mass phase for putting on size and strength progressively.

Kaileb Lyon
Kaileb Lyon· Mar 2025
iOS & Android

Overview

Length
8 weeks
Days / week
4 days
Level
Intermediate
Goal
Muscle, Women's
Equipment
Full Gym
Session length
80 min
Putting on a bit of size and strength in a short 8 week mesocycle

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
Chest
10.7%
Quadriceps
10.3%
Hamstrings
8.7%
Upper Back
8.7%
Front Delts
7.6%
Lats
7.5%
Biceps
7.5%
Glutes
7.3%
Calves
6.7%
Triceps
5.7%
Abs
4.9%
Adductors
4.5%
Middle Delts
4.5%
Rear Delts
2.6%
Lower Back
1.5%
Forearms
1.1%
Week 1 Workouts
#ExerciseSetsRepsLoad
1Squat (Barbell)55 reps@8
2Hip Adductor (Machine)412 reps@7.5
3Bulgarian Split Squat (Dumbbell)210 reps@7.5
110 reps@9
4Standing Calf Raise412 reps@8.5
5Lateral Raise (Dumbbell)412 reps@9
125 reps@7.5
#ExerciseSetsRepsLoad
1Bench Press (Barbell)45 reps@7.5
15 reps@6.5
2Pull-Up (Weighted)410 reps@8
3Incline Bench Press (Dumbbell)312 reps@8.5
4Seated Row (Cable)312 reps
5Chest Fly (Cable)412 reps@7.5
6Bicep Curl (Barbell)512 reps@8
7Hanging Leg Raise320 reps
8Cable Crunch330 reps
#ExerciseSetsRepsLoad
1Squat (Barbell)35 reps@8
15 reps@7.5
115 reps@7
2Hamstring Curl512 reps@8.5
3Deadlift (Deficit)45 reps@8.5
4Rear Delt Fly (Dumbbell)312 reps@7.5
5Leg Extension312 reps
6Standing Calf Raise512 reps
110 reps
28 reps
#ExerciseSetsRepsLoad
1Barbell Row110 reps
110 reps@8
110 reps@8.5
26 reps@10
2Tricep Pushdown (Cable)315 reps
3Bench Press (Barbell)310 reps
120 reps
4Incline Chest Fly (Dumbbell)315 reps@7
5Chin-Up (Weighted)38 reps
6One Arm Lateral Raise (Cable)112 reps
118 reps
18 reps
7Bicep Curl (Barbell)510 reps

Weeks 2–8 are in the app

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

Common questions

Yes, Upper/lower mass phase is completely free to follow on Boostcamp. Download the app on iOS or Android, find the program, and start your first workout immediately. All 8 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 80 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.

Upper/lower mass phase 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 8 weeks. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.

Upper/lower mass phase 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