The 4-Day Upper/Lower Program: Strength and Size on Four Days a Week

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I ran a six day split for most of my second year of lifting and got exactly what six day splits give busy people: four good weeks, then a skipped Friday, then a skipped Thursday, then a quiet fortnight where my gym bag lived by the door like an accusation. The problem was not effort. The problem was a schedule with zero slack. Miss one day and a whole muscle group went unworked for a week.

Upper/lower is the fix I wish I had found sooner. Four sessions a week, each muscle worked twice, and every session has a clear job. Upper body days are upper body days. Leg day does not also have to squeeze in shoulders because you ran out of week. And when life eats a session, you still trained everything that week at least once.

This is an eight week program for intermediate lifters. It assumes you already know the big lifts and you want a plan you can actually finish.

Who this is for

You have been lifting consistently for at least six months and you can squat, bench, deadlift, row, and overhead press with form that would not make a coach intervene. You have four days a week to train, not six, and you want both strength and size rather than chasing only one of them.

Skip it if you are brand new. The beginner program on this site is the right first step. Skip it too if you are deep into a powerlifting prep block and need five or six days of highly specific work. This is for the wide middle: lifters who want to get meaningfully stronger and visibly bigger on a schedule a working adult can keep.

Equipment: a barbell, a rack, dumbbells, a cable station or bands, and a pull-up bar or lat pulldown. A leg press is nice on lower days but not required.

Why four days and two exposures works

The research keeps pointing at the same two levers: total weekly volume and how you split it up. Schoenfeld and colleagues found in a 2016 meta-analysis that training a muscle twice a week beat training it once a week for growth. Their 2019 update, with total volume matched between groups, found no significant difference between higher and lower frequencies. Read together, the lesson is straightforward: weekly volume drives growth, and frequency is the delivery system that lets you accumulate that volume without turning any single session into a two hour grind.

On volume itself, Schoenfeld’s 2017 meta-analysis found a graded dose-response. Groups doing fewer than 5 sets per muscle per week grew about 5.4 percent, groups doing 5 to 9 sets grew about 6.6 percent, and groups doing 10 or more sets grew about 9.8 percent. This program lands most major muscle groups at roughly 10 to 16 hard sets per week, spread across two sessions so the quality of your last set looks something like the quality of your first.

Upper/lower is also the most forgiving split in existence. Miss a day and you lose one of two weekly exposures, not your only chest day.

The weekly layout

Train Monday, Tuesday, Thursday, and Friday, or any four days with at least one rest day between the two upper days and the two lower days. A sample week:

Day	Session	Focus
Monday	Upper A	Heavy pressing and pulling
Tuesday	Lower A	Heavy squat pattern
Wednesday	Rest	Walk, stretch, eat
Thursday	Upper B	Hypertrophy and arms
Friday	Lower B	Heavy hinge pattern
Saturday	Rest
Sunday	Rest

Sessions run 55 to 75 minutes. Rest 3 to 4 minutes between sets of the main lift, 2 minutes on secondary lifts, and 60 to 90 seconds on isolation work. If a session is running long, cut the last isolation exercise, never the main lift.

Upper A: heavy press and pull

Exercise	Sets x Reps
Barbell bench press	4 x 5
Barbell row	4 x 6
Overhead press	3 x 8
Weighted pull-up or lat pulldown	3 x 8
Dip or close-grip bench press	2 x 10
Barbell curl	2 x 12

Start bench and row heavy enough that the last rep of the last set is hard but not a grinder, leaving one rep in reserve on the first sets.

Lower A: heavy squat

Exercise	Sets x Reps
Back squat	4 x 5
Romanian deadlift	3 x 8
Leg press or front squat	3 x 10
Lying leg curl	3 x 10
Standing calf raise	3 x 12
Dead bug or plank	3 x 30 to 45 seconds

The Romanian deadlift after squats looks cruel and feels worse, but it is the best hamstring builder most lifters never program because they are too tired to care about it by then. Do it anyway, with a weight you can control for a slow three second lowering phase.

Upper B: hypertrophy and arms

Exercise	Sets x Reps
Incline dumbbell press	3 x 10
One-arm dumbbell row	3 x 10 each side
Seated cable row or chest-supported row	3 x 12
Lateral raise	3 x 15
Overhead triceps extension	3 x 12
Hammer curl	3 x 12

Upper B is the day your shoulders and arms finally get real attention instead of leftovers.

Lower B: heavy hinge

Exercise	Sets x Reps
Deadlift or trap bar deadlift	3 x 5
Front squat or leg press	3 x 8
Bulgarian split squat	3 x 10 each leg
Seated or standing calf raise	3 x 15
Hanging knee raise or cable crunch	3 x 12

Deadlifting once a week, on its own day, is a feature. Your back is fresh, your grip is fresh, and you are not pulling heavy after four sets of squats.

The 8-week block

Weeks 1 to 3 are the build. Week 4 is a deload: same movements, cut to 2 sets per exercise, and use about 70 percent of your normal loads. It will feel easy. That is the point. Weeks 5 to 7 are the push. Week 8 is test week: a heavy set of 5 on bench, squat, and deadlift sets your loads for the next block.

Progression uses double progression, which sounds technical and is actually simple:

For lifts written as a range in your log (say 8 to 10 reps), use the same weight until you hit the top of the range on every set. Then add weight next session.
For the fixed-rep main lifts (4 x 5, 3 x 5), add 5 pounds to upper body lifts and 10 pounds to lower body lifts each week you complete every set and rep.
If you miss reps on a main lift two sessions in a row, drop that lift 10 percent and rebuild. This is not failure. It is how a program lasts longer than a month.

Log every session. A program you do not track is a collection of gym visits with opinions attached.

Eating for it

Training four days a week on plants is not a complication, it is a grocery list. Protein is the number to actually track: a 2018 meta-analysis by Morton and colleagues found muscle gains topped out around 1.6 grams of protein per kilogram of bodyweight per day, so a 180 pound lifter is looking at roughly 130 grams a day. Spread it across three or four meals with 30 to 40 grams each, leaning on tofu, tempeh, seitan, lentils, and a scoop of protein powder on the days real food falls short.

When it stalls

Every program stalls eventually, and the fix is almost never a new program. First check the boring stuff: sleep under seven hours, protein under target, or two missed sessions in a row will stall anything. Next, check whether you actually deloaded in week 4 or heroically trained through it. Then, and only then, swap one stalled accessory lift for a close variation.

Run the full eight weeks before judging it. Four days a week feels almost too manageable in week 1. By week 7, with real weight on the bar and two exposures a week behind every muscle group, it will feel like exactly enough. That is what a sustainable program is supposed to feel like.