Upper/lower vs full body: which split should you run?

Upper lower vs full body is the gym's longest-running argument with the least at stake. Both build strength. Both build muscle. When the weekly sets are the same, the research can't reliably tell them apart. What actually separates them is your calendar: how many days you can lift, how long you like a session to be, and where your hard runs land.

The short version: two or three lifting days, run full body. Four days, run upper/lower. Three days and you want a bit of both, run an upper lower full body 3 day split. If you also run, pick whichever puts the leg fatigue where it hurts your running least, which is exactly the scheduling problem a strength app that schedules around your runs is built to solve.

Below: what the evidence says, where the two splits genuinely differ, the hybrid 3-day option, and sample weeks with running already in them.

Upper lower vs full body: the short answer

Most split templates built for people who also run use one of these two, because both keep leg training compatible with frequent running. If you're still weighing push pull legs or other options too, the full menu is in a guide to beginner workout splits. This post is the head-to-head.

What the research says

Short answer: it's a draw.

A 2024 meta-analysis of 14 studies compared split routines with full-body routines and found no significant difference in strength gains or muscle growth when volume was equated. The authors concluded people can pick a routine based on personal preference (Ramos-Campo et al., 2024).

The closest thing to a direct test of this exact matchup is a 12-week trial in 50 untrained women. One group trained full body twice a week; the other ran an upper/lower split four times a week, with the same exercises and the same weekly sets and reps. No between-group differences were found in maximal strength, muscle mass, jump height or power (Pedersen et al., 2022). Same results, half the number of gym visits for the full-body group, which is a point worth sitting with.

Frequency tells the same story for muscle growth. A meta-analysis of 25 studies found that, with weekly volume equated, how often you train a muscle didn't significantly or meaningfully change hypertrophy (Schoenfeld et al., 2019).

So the split is a delivery system. What it delivers is weekly hard sets per muscle and consistent attendance. Pick the one that delivers both with the least friction.

Full body vs upper lower: where they actually differ

If results are a draw, the decision comes down to logistics. Here's where the two genuinely diverge.

Days per week

This is most of the answer. With two or three days, full body is the only option that trains everything at least twice a week. Upper/lower on three days means each half of your body gets trained one and a half times a week on average, which works but feels lopsided. With four days, upper/lower fits cleanly and full body four times a week starts to feel like a lot of squatting.

Session length

Full-body sessions carry a lower lift, a push, a pull and an extra, so they tend to run 45 to 60 minutes. Upper/lower sessions only cover half the body, so each muscle can get more sets in the same time, or the session can be shorter. If 40 minutes is your ceiling, upper/lower on four days handles that better than full body on three.

Practice

Strength is partly skill. Full body lets you squat, press and pull two or three times a week, which is how beginners get good at those lifts quickly. That's a big reason the 3-day full body workout is the default starting point.

Missed sessions

Miss a full-body day and you still trained everything twice that week. Miss a lower day on upper/lower and your legs get one session that week. Neither is a disaster. Full body is just more forgiving when life happens.

Where the leg fatigue lives

For runners, this is the one that matters. Full body puts some leg work on every lifting day, so it only works if you rotate one heavy lower day with lighter ones. Upper/lower concentrates leg work into two known days, which makes it easy to keep those days away from intervals and the long run. That's the main reason hybrid athletes with four days tend to settle on the upper/lower split.

The upper lower full body 3 day split

There's a third option that people keep asking about: the full body upper lower split, usually run as three days. One upper day, one lower day, one full-body day.

Why it works: each muscle gets trained twice a week in three sessions, the upper and lower days stay focused, and the full-body day picks up anything you want more of. It's a good bridge for someone moving from full body toward four days, or for a lifter who likes the feel of split days but only has three slots.

Why it's not magic: it delivers the same weekly sets as a 3-day full body routine, just arranged differently. Same evidence, same draw. Choose it because you like it, not because it's secretly better.

The 3 day upper lower full body split pairs well with running because there's exactly one hard leg day. Put it where it doesn't collide with your hard runs and the other two sessions barely matter to your legs.

Upper lower vs full body when you also run

The site-wide rule applies to both: keep the heavy leg session and the hard runs on different days, never put heavy legs the day before intervals or the long run, and let easy runs fill the gaps.

Full body plus running (3 lifts)

Upper/lower plus running (4 lifts)

Upper, lower, full body plus running (3 lifts)

In all three, the heavy lower session sits on an easy-run day, with a non-leg day or rest after it, and nothing heavy for the legs lands the day before Saturday.

A rough rule for picking between them as a runner: if running is the priority and you lift two or three times, full body. If lifting and running share the priority and you have four days, upper/lower. If you want split days on three, the hybrid.

What about push pull legs and PHUL?

Both come up in this debate, so briefly.

Push pull legs is a five- or six-day split for people whose main sport is lifting. As a three-day version it trains each muscle once a week. As a six-day version it leaves very little room for running. Of the common splits, it's the hardest to pair with three or more runs a week.

If you like upper/lower but want one heavy day and one higher-rep day for each half, that's power hypertrophy upper lower, usually shortened to PHUL. Same four days, with the intent split between strength and size.

Whatever split you land on, build each day on compound exercises: a squat or hinge, a press, a pull. The split decides when those lifts happen. The lifts do the work.

Common mistakes

Picking a split for a week you don't have. Four-day upper/lower that you complete three days of turns into a rotating mess. Three-day full body that you complete every week is the better program.

Switching because you're bored. Progress comes from adding reps and weight to the same lifts over months. Give any split at least one full training block before judging it.

Heavy legs everywhere. Full body with heavy squats three times a week, plus running, is how knees and long runs both suffer. Rotate heavy, light and moderate.

Treating upper days as optional. On upper/lower, upper days are the easy ones to place around runs. They're also the first ones people skip. Don't.

How exrsz handles your split

exrsz builds your lifting split and your running into one periodized plan from your goal, schedule, level and equipment. It keeps heavy leg days away from hard runs, adapts each week to how you actually trained, and reshuffles missed sessions instead of stacking them onto the next day.

FAQ

Is upper lower better than full body?

Not for results. Split and full-body routines produced similar strength and muscle gains when volume was equated (Ramos-Campo et al., 2024). Choose by how many days you can lift: two or three favor full body, four favors upper/lower.

Is full body vs upper lower better for beginners?

Full body, usually. You practice each main lift more often, sessions cover everything, and a missed day costs less. In a 12-week trial in untrained women, full body twice a week matched a four-day upper/lower split on strength and muscle (Pedersen et al., 2022).

What is an upper lower full body 3 day split?

Three sessions a week: one upper-body day, one lower-body day and one full-body day. Each muscle gets trained twice a week, and it's a common bridge between full body and a four-day upper/lower split.

Which split is better for runners?

Both work. Full body suits two or three lifting days if you rotate one heavy leg day with lighter ones. Upper/lower suits four days because leg work is concentrated on two days you can keep away from intervals and the long run.

Can I switch between upper lower and full body?

Yes. Many people run full body for their first months, then move to upper/lower when they have a fourth day. Switch at the start of a new training block, not every couple of weeks.