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4-Day Muscle & Strength Builder

4-Day Muscle & Strength Builder

Intermediate Muscle building Gym Everyone

A 4-day gym program designed to help you transition from cutting back into serious muscle and strength gains.

Length: 8 weeks
Days a week: 4
Session length: 30 to 48 min
Equipment: Bench, Machine, Barbell
Exercises: 27 across 5 workout days
In the app: Free routine web version free to read

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The plan

Repeat the same workouts every week for the length of the routine. Add reps or sets before you add weight.

Phase 1 — Muscle & Strength Builder

Lower Body 5 exercises

Upper Body 5 exercises

Lower Body 5 exercises

Upper Body 5 exercises

Optional Upper Body (Arms & Shoulders) 7 exercises

About this routine

If you’ve spent months dieting, cutting, and leaning out, this program helps you shift gears back into growth mode. The goal here is simple: rebuild strength, add quality muscle, and get your numbers moving up again.

You’ll train four days per week using an upper/lower split. One day focuses on the lower body, the next on the upper body, giving each muscle group enough recovery while still keeping training frequency high. This structure is perfect for intermediate lifters who already understand the basics and are ready to push heavier weights.

The core of this program revolves around strength-focused sets that range from about 8 reps down to as low as 2 reps as the weight increases. You’ll start lighter with higher reps, then gradually load more weight each set while the reps drop. This style builds raw strength while also stimulating serious muscle growth. Alongside the heavy work, you’ll also see higher-rep isolation work in the 8–20 rep range to fully fatigue individual muscles and bring up weaker areas.

There’s also an optional fifth training day focused mostly on arm and shoulder isolation. If you feel recovered and want to bring extra attention to your upper body, add it in. If recovery is tight, stick with the main four days.

Run this program for at least 8 weeks. If you’re enjoying it and recovering well, you can stretch it to 4 months. In that case, perform the first two months as a 4‑day routine, then add the optional fifth day during the final two months to increase training volume.

If bodyweight movements like push-ups or pull-ups are challenging, do as many reps as you can with good form, then finish the set using assistance bands or a machine.

To support muscle growth, make sure your nutrition matches the workload. Estimate your daily calorie needs using your BMR and aim to consistently hit that intake. For protein, target around 1.5 grams per kilogram of bodyweight every day. Stay hydrated and don’t skip meals after training—your muscles need fuel to grow.

Supplements can help support recovery and performance. A quality whey isolate protein is great for hitting your daily protein goal. A pre-workout can give you an energy boost before tough sessions, and ZMA may help support sleep quality and recovery.

Train hard, focus on good form, and progressively challenge yourself each week. That’s how real muscle gets built.

Coach notes

- For exercises with 5 sets, rest about 1 minute between sets. - For exercises with 3 sets, rest about 3 minutes between sets. - Choose weights that allow you to reach the listed rep target with good form. You should barely complete the final rep—if you can easily do more, the weight is too light.