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Lean Muscle - SUN
IntermediateFree

Lean Muscle - SUN

Lean Muscle, Stronger Legs, Defined Core – Smarter Workouts for Fat Loss and Mass Gain

sunthar subramanian
sunthar subramanian· Sep 2025
2athletes running this program
iOS & Android

Overview

Length
4 weeks
Days / week
4 days
Level
Intermediate
Goal
Women's
Equipment
Full Gym
Session length
50 min
Program Brief: This 4-day gym program is designed for intermediate lifters aiming to build lean muscle, burn fat, and enhance lower-body and core strength. It balances compound lifts, hypertrophy work, and functional training while prioritizing joint- and back-friendly exercises. Key features: Leg & Calf Mass Focus: Twice-weekly targeted lower body volume for growth and definition. Upper Body Strength & Biceps Development: Includes push/pull splits with elbow-friendly alternatives. Core/Abs Integration: Core exercises 2–3x/week to improve midsection definition and stability without compromising recovery. Progressive Overload & Drop Sets: Structured for continuous strength and size gains while supporting fat loss. Optional Finishers & Conditioning: Short metabolic finishers enhance calorie burn, promoting lean physique development. Flexible Alternatives: Exercises provided to accommodate joint, back, or equipment limitations. This program is ideal for those who want efficient, science-based workouts that maximize muscle gain, fat loss, and core strength within ~45–55 minutes per session.

Who it's for

Intermediate athletes ready for a structured program
Athletes focused on women's
Athletes who can train 4 days per week
Athletes with access to a full gym (barbells, dumbbells, cables, and machines)

Muscle engagement

Front
Back
Quadriceps
13.2%
Glutes
10.6%
Hamstrings
9.9%
Triceps
9.7%
Front Delts
9.3%
Abs
7.9%
Upper Back
7.5%
Lats
7.5%
Biceps
6.2%
Middle Delts
4.4%
Chest
4%
Calves
4%
Lower Back
2.9%
Forearms
1.3%
Cardio
0.9%
Rear Delts
0.7%
Week 1 Workouts
#ExerciseSetsReps
1Bench Press (Dumbbell)4—
2Incline Bench Press (Dumbbell)3—
3Shoulder Press (Machine)3—
4Lateral Raise (Dumbbell)3—
5Tricep Pushdown (Cable)3—
6Leg Raise (Captain's Chair)3undefined min
7Cardio1undefined min
#ExerciseSetsReps
1Front Squat (Barbell)4undefined min
2Romanian Deadlift (Trap Bar)3undefined min
3Bulgarian Split Squat (Dumbbell)3undefined min
4Glute Bridge (Barbell)3undefined min
5Calf Raise (Leg Press)3undefined min
6Seated Calf Raise3undefined min
7Ab Wheel3undefined min
8Kettlebell Swing5undefined min
#ExerciseSetsReps
1Chest Supported Row (Machine)4undefined min
2Lat Pulldown3undefined min
3One Arm Bent Over Row3undefined min
4Pull-Up (Assisted)3undefined min
5Hammer Curl (Dumbbell)3undefined min
6Incline Curl (Dumbbell)3undefined min
7Push Up1undefined min
8Wood Chop3undefined min
9Inverted Row1undefined min
#ExerciseSetsReps
1Landmine Push Press4undefined min
2Trap Bar Deadlift3undefined min
3Split Squat (Barbell)3undefined min
4Pull-Up (Assisted)3undefined min
5Tricep Pushdown (Cable)3undefined min
6Seated Calf Raise3undefined min
7Step-Up (Weighted)3undefined min
8Kettlebell Swing2undefined min
9Abs Crunch (Weighted)3undefined min
10Cardio1undefined min
11Push Up1undefined min

Weeks 2–4 are in the app

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

Common questions

Yes, Lean Muscle - SUN 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 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.

Lean Muscle - SUN 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 4 weeks. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.

Lean Muscle - SUN 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

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