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castor!!
IntermediateFree

castor!!

gaining strength and muscle mass

j T.
j T.· Jan 2025
1athletes running this program
Free on iOS & Android

Overview

Length
4 weeks
Days / week
3 days
Level
Intermediate
Goal
Muscle, Strength
Equipment
Full Gym
Session length
60 min
gaining strength and muscle mass

Who it's for

Intermediate athletes ready for a structured program
Athletes focused on gaining both size and strength
Athletes who can train 3 days per week
Athletes with access to a full gym (barbells, dumbbells, cables, and machines)

Muscle engagement

Front
Back
Biceps
11.5%
Triceps
11.5%
Upper Back
9.8%
Lats
9.5%
Front Delts
9.2%
Quadriceps
8.6%
Hamstrings
8.6%
Middle Delts
8.6%
Glutes
8.6%
Chest
6.1%
Lower Back
4.3%
Forearms
1.7%
Abductors
0.9%
Rear Delts
0.9%
Week 1 Workouts
#ExerciseSetsRepsLoad
1Leg Press38 reps@7.5
2Bulgarian Split Squat (Dumbbell)38 reps@7.5
3Leg Curl312 reps@8
4Back Extension312 reps@8
#ExerciseSetsRepsLoad
1Bent Over Row (Barbell)28 reps@7.5
2Wide Grip Pull-Up310 reps@7.5
3Shoulder Press (Machine)310 reps@7.5
4Single Arm Row (Cable)212 reps@8
5One Arm Lateral Raise (Cable)315 reps@7.5
#ExerciseSetsRepsLoad
1Bench Press (Barbell)35 reps@7.5
2Dip (Bodyweight)28 reps@7.5
3Bicep Curl (Dumbbell)38 reps@7.5
4V-Handle Tricep Pushdown (Cable)312 reps@8
5Hammer Curl (Cable)312 reps@8

Weeks 2–4 are in the app

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

Common questions

Yes, castor!! is completely free to follow on Boostcamp. Download the app on iOS or Android, find the program, and start your first workout immediately. All 4 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.

castor!! is structured around 3 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 4 weeks. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.

castor!! 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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Free on iOS & Android