Lean Rebuild: 3-Day Fat Loss & Muscle Definition
Overview
Who it's for
Muscle engagement
| # | Exercise | Sets | Reps | Load |
|---|---|---|---|---|
| 1 | Elliptical Machine | 1 | 15 min | @5–6 |
| 2 | Deadlift (Barbell) | 4 | 6–8 reps | @8 |
| 3 | Lat Pulldown | 4 | 10–12 reps | @8 |
| 4 | Seated Row (Cable) | 4 | 12 reps | @8 |
| 5 | Straight Arm Pulldown | 4 | 15 reps | @8 |
| 6 | Bicep Curl (Barbell) | 4 | 10 reps | @8 |
| 7 | Hammer Curl (Dumbbell) | 4 | 12 reps | @8 |
| 8 | Preacher Curl (Barbell) | 4 | 12 reps | @8 |
| Superset | ||||
| 9A | Plank | 3 | 0.5 min | @8 |
| 9B | Mountain Climber | 3 | 12 reps | @8 |
| 9C | Bicycle Crunch | 3 | 20 reps | @8 |
| # | Exercise | Sets | Reps | Load |
|---|---|---|---|---|
| 1 | Elliptical Machine | 1 | 15 min | @5–6 |
| 2 | Bench Press (Barbell) | 4 | 8–10 reps | @8 |
| 3 | Incline Bench Press (Dumbbell) | 4 | 10 reps | @8 |
| 4 | Incline Fly Press (Dumbbell) | 4 | 12 reps | @8 |
| 5 | Cable Crossover | 4 | 15 reps | @8 |
| 6 | Dip (Assisted) | 4 | 10 reps | @8 |
| 7 | Tricep Pushdown (Cable) | 4 | 12 reps | @8 |
| 8 | Tricep Extension (Dumbbell) | 4 | 12 reps | @8 |
| 9 | Bench Press (Close Grip) | 4 | 10 reps | @8 |
| Superset | ||||
| 10A | Side Plank | 3 | 0.5 min | @8 |
| 10B | Hanging Leg Raise | 3 | 10 reps | @8 |
| 10C | Russian Twist | 3 | 15 reps | @8 |
| # | Exercise | Sets | Reps | Load |
|---|---|---|---|---|
| 1 | Elliptical Machine | 1 | 15 min | @5–6 |
| 2 | Squat (Barbell) | 4 | 8–10 reps | @8 |
| 3 | Romanian Deadlift (Barbell) | 4 | 10 reps | @8 |
| 4 | Leg Press | 4 | 12 reps | @8 |
| 5 | Seated Calf Raise | 4 | 15 reps | @8 |
| 6 | Seated Shoulder Press (Dumbbell) | 4 | 10 reps | @8 |
| 7 | Lateral Raise (Dumbbell) | 4 | 12 reps | @8 |
| 8 | Reverse Pec Deck | 4 | 12 reps | @8 |
| 9 | Front Raise | 4 | 15 reps | @8 |
| Superset | ||||
| 10A | Bird Dog | 3 | 10 reps | @8 |
| 10B | Walkout Plank | 3 | 10 reps | @8 |
| 10C | Mountain Climber | 3 | 20 reps | @8 |
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, Lean Rebuild: 3-Day Fat Loss & Muscle Definition 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 90 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 Rebuild: 3-Day Fat Loss & Muscle Definition 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 12 weeks. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.
Lean Rebuild: 3-Day Fat Loss & Muscle Definition 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
