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4 Weeks to Massive Muscle

Source: Muscle & Fitness – 4-day/week hypertrophy split
Gym Rest Clock: 00:00
Program Essentials
Day 1: Abs & Legs
TypeExerciseSetsRepsNotes
Squat Pattern
Front Squats
38-10 Opens the session while fresh. Rotate squat order weekly for balanced development.
Quad Isolation
Leg Extensions
312-15 Machine. Full lockout at the top of each rep.
Squat Pattern
Standard Squats
38-10 Part of the weekly squat rotation with front squats and Smith machine squats.
Hamstring Isolation
Leg Curls
312-15  
Squat Pattern
Smith Machine Squats
310-12 Weight naturally trends down as fatigue accumulates through the squat block.
Unilateral
Lunges
310-12/leg  
Day 2: Chest & Triceps
TypeExerciseSetsRepsNotes
Horizontal Press
Flat-Bench Barbell Press
36-8 Bench angle rotates across the 4 weeks: flat (weeks 1 & 4), incline (week 2), decline (week 3).
Horizontal Press
Incline Bench Press
36-8 Week 2's angle variation on the same press slot.
Horizontal Press
Dumbbell Bench Press
38-10  
Isolation
Cable/Dumbbell Flyes
212-15 Vary the bench angle (flat/incline/decline) to match the day's press angle.
Tricep Compound
Closegrip Bench Press Source
38-12 "Bread-and-butter" tricep exercise in the traditional hypertrophy rep range, per the source.
Tricep Isolation
Seated French Press Source
38-12  
Tricep Isolation
Cable Tricep Extension Source
38-12  
Day 3: Full Rest
No training. One of the 3 full rest days/week the program builds in on purpose — expect lingering soreness from Day 2 through here.
Day 4: Shoulders, Traps & Abs
TypeExerciseSetsRepsNotes
Vertical Press
Behind-the-Neck Overhead Press
38-10 Source notes a front-of-head press works as a safer substitute if shoulder mobility is a concern.
Vertical Press
Dumbbell Press
38-10  
Shoulder/Trap
Upright Rows
210-12 Barbell or dumbbell.
Lateral Delt
Lateral Raises
310-12 Lean into the movement to bias the delts over the supraspinatus, per the source.
Rear Delt
Reverse Pec Deck
312-15  
Trap
Barbell Shrugs Source
3Heavy 6 total shrug sets across barbell + dumbbell, per the source. Slow, controlled shrug — not a bounce.
Trap
Dumbbell Shrugs Source
3Heavy  
Core
Double Crunches
315-20  
Day 5: Back & Biceps
TypeExerciseSetsRepsNotes
Hinge Pattern
Deadlifts Source
46-8 "As much a leg exercise as it is a back exercise," but the source calls it essential for back and overall mass.
Hinge Pattern
Dumbbell Deadlifts
38-10  
Horizontal Pull
Bent-Over Rows
38-10  
Horizontal Pull
Dumbbell Rows
38-10  
Horizontal Pull
T-Bar Rows
38-10  
Vertical Pull
Lat Pulldowns Source
38-10 Back volume for the day totals ~20 sets across these 6 movements, per the source.
Bicep
Barbell Curls Source
3Heavy Heavy weight to promote size, per the source.
Bicep
Preacher Curls Source
3Heavy  
Bicep
Hammer Curls Source
3Heavy  
Days 6 & 7: Full Rest
No training. The remaining 2 of the program's 3 weekly rest days — back into Day 1 fresh next week.
Nutrition
Supplements
Reasoning: Built from Muscle & Fitness's "4 Weeks to Massive Muscle Program" article. The source lists exercises and the weekly split cleanly but only gives explicit set/rep numbers for a handful of movements (marked Source above); the rest are filled in at standard hypertrophy volume consistent with the article's own cues (traditional 8-12 range, ~20 total back sets, 6 total shrug sets). No supplement or nutrition specifics exist in the source beyond "eat a lot" — those sections are left intentionally thin rather than invented.