6-Week Muscle Building Workout Plan
A six-week muscle building block on a four-day upper/lower split. Two three-week phases take you from higher-rep volume into heavier loading to drive real size gains in a focused timeframe.
Program Overview
This is a six-week muscle building block built on a four-day upper/lower split. Six weeks is an effective mesocycle length: long enough to drive measurable muscle and strength gains, structured enough to progress properly, and short enough to keep you focused throughout. It slots neatly between a short kickstart and a full 12-week program.
The split trains upper body and lower body twice each per week, so every major muscle group is hit with high frequency. The plan runs in two three-week phases: Phase 1 accumulates volume in higher rep ranges to build a base and drive a strong pump, then Phase 2 shifts to heavier loading in lower rep ranges to convert that base into strength and size. This progression from volume to intensity is a proven way to build muscle within a defined block.
Sessions run 45 to 60 minutes. To grow, you need to eat in a slight calorie surplus with enough protein; training provides the stimulus, food provides the material.
Building muscle responds well to a planned progression. Three weeks of higher-rep volume builds a foundation and prepares your joints and muscles, then three weeks of heavier, lower-rep work drives strength and size on top of that base. This structure produces more than running the same rep range for six weeks straight. Related plans: Intermediate 4-Day Hypertrophy Program and 8-Week Muscle Building Plan.
Who Is This For?
This program is for intermediate lifters who want a focused six-week size block.
This plan is right for you if:
- You have at least six months of consistent training
- You can train four days per week
- You want a structured block with real progression
- You are eating in a slight surplus to support growth
- You want high frequency on every muscle group
Muscle is built from a slight calorie surplus and enough protein. If you train hard but eat at or below maintenance, you will struggle to add size. Set your surplus with our macro calculator and keep protein high. When you finish, browse all our muscle gain programs for your next step.
Weekly Schedule
Phase 1: Accumulate Volume (Weeks 1-3)
Four sessions per week, upper and lower twice each. Phase 1 uses higher rep ranges to build a base and drive a strong pump. Rest 90 seconds to 2 minutes on compounds, 60 on isolation. Establish your working weights.
Start with 2 to 3 reps in reserve. The higher reps build a foundation and prepare you for the heavier Phase 2. Add weight when you hit the top of the range on all sets.
Flat bench, lower to your chest, press to lockout.
Hinge at the hips, row the bar to your lower chest, squeeze.
Press dumbbells overhead from shoulder height.
Pull to your upper chest, drive your elbows down.
Curl the bar without swinging, lower with control.
Push down and spread the rope at the bottom, squeeze.
Squat to at least parallel, drive up through your mid-foot.
Push your hips back, lower to a hamstring stretch, drive hips forward.
Rear foot on a bench, lower straight down, drive through the front heel. The video shows the bodyweight version; add dumbbells for load.
Extend to lockout, squeeze, lower with control.
Full stretch at the bottom, drive onto your toes, hold.
Bench inclined, press dumbbells up, lower to a deep stretch.
Pull to your lower chest, one-second squeeze on every rep.
Raise to shoulder height with a slight elbow bend.
Pull toward your face with elbows high, squeeze your rear delts.
Dumbbells hanging on an incline bench, curl without swinging, slow descent.
Dumbbell overhead, lower behind your head, extend.
Bar on your front delts, elbows high, squat upright.
Upper back on a bench, bar across your hips, drive to a straight line, squeeze.
Step forward, lower your back knee, drive through the front heel.
Extend to lockout, squeeze.
Full range, hold at the top.
Low-intensity walking on non-training days supports recovery, digestion, and daily energy expenditure without adding fatigue to your working muscles.
Light stretching and mobility for the hips, thoracic spine, and shoulders. Ten focused minutes keeps the tight spots from heavy training in check.
Phase 2: Heavier Loading (Weeks 4-6)
Phase 2 drops the rep ranges and adds a set to the main compounds so you can lift heavier. The volume base from Phase 1 lets you push the loads to drive strength and size.
Add a set to the first two exercises on each day and push the weight up as the reps drop. Take full rest on your heavy compound sets. Aim to end week 6 noticeably stronger than week 3.
One extra set, lower reps, heavier weight.
One extra set, lower reps, heavier weight.
Lower reps, heavier dumbbells.
Lower reps, heavier weight, one-second pause at the bottom.
Lower reps, heavier weight.
Lower reps, heavier weight.
One extra set, lower reps, heavier weight.
One extra set, lower reps, heavier weight.
Lower reps, heavier dumbbells. The video shows the bodyweight version; add dumbbells for load.
Lower reps, heavier weight.
Lower reps, heavier load.
Lower reps, heavier dumbbells.
Lower reps, heavier weight, one-second squeeze.
Small increase only if strict.
Increase reps before weight.
Lower reps, heavier dumbbells.
Lower reps, heavier weight.
Lower reps, heavier weight, elbows high.
One extra set, lower reps, heavier weight.
Lower reps, heavier dumbbells.
Lower reps, heavier weight.
Heavier load, same tempo.
Low-intensity walking on non-training days supports recovery, digestion, and daily energy expenditure without adding fatigue to your working muscles.
Light stretching and mobility for the hips, thoracic spine, and shoulders. Ten focused minutes keeps the tight spots from heavy training in check.
Nutrition Guidance
Training creates the stimulus; nutrition determines the result. Whatever your goal, your calories and protein have to line up with it. Our macro calculator sets your targets, and our high protein recipes make hitting them easier. For the nutrition side, our guides on how to bulk successfully and increasing your daily protein intake are worth a read.
The Basics
- Calories: Eat in a slight surplus of 200 to 400 calories per day to build muscle while minimising fat gain. Our macro calculator sets your starting point.
- Protein: 1.6 to 2.2g per kg of bodyweight daily. Protein drives recovery and muscle retention. Browse our high protein recipes for ideas.
- Hydration: Drink water consistently, especially on training days.
- Sleep: Seven to nine hours per night. Recovery happens between sessions, not during them.
Use the macro calculator to set your calories and protein for your goal, then track your bodyweight as a weekly average and adjust in small increments based on the trend.
