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Leg Builder
IntermediateFree

Leg Builder

Strength and Body building program to focus on adding size to the legs.

· Apr 2025
iOS & Android

Overview

Length
9 weeks
Days / week
5 days
Level
Intermediate
Goal
Muscle, Strength
Equipment
Full Gym
Session length
70 min
This program will help you develop the entire lower body. A mix of volume and intensity is going to hit every muscle in the lower body and allow you to develop size and strength. A belt is recommended but building strength without a belt is always beneficial.

Who it's for

Intermediate athletes ready for a structured program
Athletes focused on gaining both size and strength
Athletes who can train 5 days per week
Athletes with access to a full gym (barbells, dumbbells, cables, and machines)

Muscle engagement

Front
Back
Quadriceps
19.9%
Hamstrings
15.1%
Glutes
14.4%
Chest
7.5%
Adductors
6.4%
Front Delts
5.3%
Triceps
4.8%
Lats
4.1%
Biceps
3.9%
Abductors
3.7%
Calves
3.6%
Middle Delts
3.4%
Lower Back
2.7%
Upper Back
2.6%
Abs
2%
Forearms
0.3%
Rear Delts
0.3%
Other
0.1%
Week 1 Workouts
#ExerciseSetsRepsLoad
1Squat (Barbell)48 reps75%
2Lunge (Dumbbell)410 reps@8.5
3Seated Hamstring Curl310 reps@8
4Leg Extension310 reps@8
5Hip Adductor (Machine)310 reps@8
6Hip Abductor (Machine)310 reps@8
#ExerciseSetsRepsLoad
1Lat Pulldown36–8 reps@8.5
2Seated Row (Cable)38 reps@8
3Romanian Deadlift (Barbell)36–8 reps@8
4Standing Pullover (Cable)310 reps@7.5
5Incline Curl (Dumbbell)310 reps@8.5
6Bayesian Curl2AMRAP@9
#ExerciseSetsRepsLoad
1Front Squat (Barbell)56 reps@8.5
2Bulgarian Split Squat (Dumbbell)310 reps@8.5
3Seated Hamstring Curl310 reps@8.5
4Leg Extension310 reps@8.5
5Leg Press38 reps@9
6Seated Calf Raise310 reps@8
#ExerciseSetsRepsLoad
1Bench Press (Barbell)54 reps85%
2Incline Bench Press (Dumbbell)36–8 reps@8.5
3Chest Fly (Machine)310 reps@8.5
4Seated Shoulder Press (Dumbbell)310 reps@7.5
5Single Arm Tricep Extension (Cable)2AMRAP@9
6Lateral Raise (Dumbbell)310 reps@8.5
#ExerciseSetsRepsLoad
1Squat (Barbell)83 reps90%
2Seated Hamstring Curl310 reps@8
3Leg Extension310 reps@8
4Hip Adductor (Machine)310 reps@8.5
5Hip Abductor (Machine)310 reps@8.5
6Standing Calf Raise310 reps@9

Weeks 2–9 are in the app

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

Common questions

Yes, Leg Builder is completely free to follow on Boostcamp. Download the app on iOS or Android, find the program, and start your first workout immediately. All 9 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.

Leg Builder is structured around 5 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 9 weeks. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.

Leg Builder 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