Upper/Lower Split (4 Days/Week): Why It Remains the Gold Standard for Intermediates

An upper lower split 4 days a week is a good default for most intermediates because it trains every muscle twice a week, keeps each session manageable, and leaves three full rest days. It is not the only way to grow. It is simply the plan that makes the research-backed basics (enough frequency, enough sets, enough recovery) easiest to hit.

This guide covers why it works, what the evidence does and does not say, and a complete Upper A / Upper B / Lower A / Lower B template. For how it compares with other layouts, see our workout splits pillar guide, and for the head-to-head version, full body vs upper lower vs push pull legs.

What is an upper lower split?

You divide the body into two halves. Upper days train chest, back, shoulders and arms. Lower days train quads, hamstrings, glutes and calves. Four sessions a week means you do each half twice, usually as Upper A, Lower A, Upper B, Lower B.

The “A” and “B” matter. If Upper B is just a copy of Upper A, you lose variety and may run out of useful angles. We design each pair so the A day leans on one thing and the B day on another.

Why is the upper lower split the gold standard?

Calling it “gold standard” is a coach’s opinion, not a study result. Here is the honest case for it.

1. Twice-weekly frequency is well supported. A 2016 meta-analysis of 10 studies found that training a muscle twice a week was linked to a larger hypertrophy effect size than once a week (0.49 vs 0.30), and the authors concluded major muscles should be trained at least twice weekly (Schoenfeld et al., 2016). Whether three times beats twice was unresolved at that point.

2. Once weekly sets are matched, frequency matters little. A larger 2019 meta-analysis of 25 studies found no significant difference between higher and lower frequencies when volume was equated, including in resistance-trained people and in upper and lower body separately (Schoenfeld et al., 2019). The authors concluded frequency can be chosen by personal preference for a given volume.

3. It makes weekly volume easy to reach. Across 15 studies, each extra weekly set was associated with a small increase in muscle growth (about 0.37% more gain per set), with a graded dose-response overall (Schoenfeld et al., 2017). Four sessions, each covering half the body, let you accumulate those sets without any single workout turning into a marathon.

4. The calendar works. Mon/Tue/Thu/Fri leaves Wednesday plus the weekend free. For many working people in India, that is easier to protect than a 6-day plan.

Is training a muscle more than twice a week better?

Probably not, if total sets match. In a 9-week trial in 21 trained participants (11 men, 10 women), two whole-body sessions a week produced similar muscle growth and strength gains to four sessions a week with equal weekly volume (Hamarsland et al., 2021). In 67 untrained people over 8 weeks, a twice-a-week split and a four-times-a-week full-body routine also gave similar results with equal set volume (Evangelista et al., 2021).

Not every trial agrees. One 6-week study in 18 recreationally trained men compared 4 low-volume sessions with 2 high-volume sessions at equal weekly volume. Both groups gained fat-free mass, but only the 2-day group increased arm circumference and elbow flexor thickness, and only that group lost fat mass (Yue et al., 2018). It is a small, short study, so I would not read much into it. The takeaway is that results may vary by muscle, and neither schedule is clearly superior.

How many sets per muscle on an upper lower split?

A practical starting point for most intermediates is about 10-15 hard sets per muscle per week, which means 5-8 sets per muscle in each of the two sessions. That range is a coaching convention informed by the dose-response data above, not a number any single trial proves. The 2017 meta-analysis found more volume tended to mean more growth but could not pin down where returns flatten (Schoenfeld et al., 2017).

How to use that:

• Start near 10 sets per muscle per week and only add when you are recovering and progressing.
• Count only hard sets, roughly 1-3 reps short of failure.
• Compound lifts also hit other muscles (bench press hits triceps and front delts), so you rarely need to do arm work as a separate high-volume block. Our weekly set volume dose-response guide goes deeper, and the training volume calculator can tally your week.

Upper A and Upper B: how to design them

Upper A (press emphasis) starts with a heavy press, followed by a row, then shoulders and arms. Upper B (pull emphasis) starts with a vertical or horizontal pull, followed by an incline press, then rear delts and arms.

Rotating the lead exercise keeps your first, freshest sets for a different movement each day.

Upper A (Monday)

Exercise	Sets	Reps
Flat barbell or dumbbell bench press	3	5-8
Chest-supported or seated cable row	3	8-12
Dumbbell shoulder press	3	8-12
Wide-grip lat pulldown	2	10-12
Dumbbell lateral raise	3	12-20
Triceps pushdown	3	10-15
Hammer or preacher curl	2	10-15

Upper B (Thursday)

Exercise	Sets	Reps
Wide-grip lat pulldown or pull-up	3	6-10
Incline dumbbell press	3	8-12
One-arm dumbbell or machine row	3	8-12
Pec-dec or cable fly	2	12-15
Dumbbell lateral raise or rear delt fly	3	12-20
Overhead triceps extension	3	10-15
Incline or preacher curl	3	10-15

Across the week that gives about 11 direct sets for the back, 8 for chest, 6 each for side delts and triceps and 5 for biceps, plus plenty of indirect work from presses and rows. That sits at the lower end of the target range on purpose, so you have room to add sets to lagging muscles. Look for exercise-specific advice in the guides to incline vs flat bench angles and chest-supported rows.

Lower A and Lower B: quad vs hamstring emphasis

Lower days are where this split earns its keep, because you can split the leg workload instead of doing one brutal session.

Lower A (quad emphasis): squat pattern first, then a leg press or extension, then a hamstring curl and calves. Lower B (hamstring and glute emphasis): hip hinge first, then a lunge or hip thrust, then leg curls and calves.

Lower A (Tuesday)

Exercise	Sets	Reps
Barbell back squat (or hack squat)	3	5-8
Romanian deadlift	2	8-10
Leg press	3	10-15
Single-leg extension	2	12-15
Seated leg curl	3	10-15
Standing calf raise	3	10-15

Lower B (Friday)

Exercise	Sets	Reps
Stiff-leg or Romanian deadlift	3	6-10
Hip thrust	3	8-12
Bulgarian split squat or lunge	3	8-12
Seated leg curl	3	10-15
Adductor machine	2	12-15
Standing calf raise	3	10-15

Quad and hamstring exercise choices are covered in quad anatomy and training and seated vs lying leg curls.

How to progress on this split

Use double progression. Pick a rep range, such as 8-12. When you hit 12 reps on every set with solid form, add the smallest load jump available and start again at 8. Write numbers down; progress you cannot see is hard to manage.

Keep most sets 1-3 reps from failure so the second session of the week does not suffer. If your lifts drop for two sessions in a row, trim a set or two per exercise for a week. Our progressive overload and deloads guide covers what to do when progress stalls.

Upper lower vs full body vs PPL: which should you pick?

Setup	Best for	Trade-off
Full body, 3 days	Beginners, 3-day schedules	Sessions get long if you add sets
Upper lower, 4 days	Intermediates with 4 days	Needs 4 fixed days
Push pull legs, 5-6 days	Lifters who enjoy daily gym time	Takes more days to train each muscle twice

If you can only train three days, see our 3-day full body plan. If you want to spread weekly sets deliberately, read distributing weekly volume across splits. For more on frequency itself, see 1x vs 2x vs 3x per week.

Who should not use it, and when to see a doctor

If you are brand new to lifting, a simpler full-body plan with lighter volume is usually kinder to your joints and your schedule. If you have a known injury, chest pain, dizziness during exercise, or pain that lingers or is sharp rather than muscular soreness, speak to a doctor or physiotherapist before pushing on. Nothing here is a diagnosis.

The bottom line

The upper lower split earns its reputation through practicality. It gives you twice-weekly frequency, enough room for 10-15 hard sets per muscle, and three rest days, all in four manageable sessions. The research says frequency matters less than total volume once you reach twice a week, so the best split is the one you can run consistently.

Want the done-for-you version? Grab our free workout plans, and use the protein calculator to set your daily target so the training has something to build with.