How the split is divided
Two session types, alternated.
| Day | Muscles |
|---|---|
| Upper | Chest, lats, traps, shoulders, biceps, triceps, and usually abs |
| Lower | Quads, hamstrings, glutes, calves, lower back |
A typical four-day week runs upper, lower, rest, upper, lower, then two days off. Every muscle gets two sessions a week, which is the frequency most lifters respond to best.
Why four days is the sweet spot
Four is an awkward number for most splits and a natural one for this.
- Push pull legs is a three-day cycle. Run over four days it either repeats a day unevenly or drifts out of phase with your week.
- A bro split at four days trains each muscle once every seven days.
- Full body at four days is possible but the sessions get long and the overlap between consecutive days is harder to recover from.
Upper lower divides into four with nothing left over, which is the whole argument. Two upper, two lower, twice per muscle, same days every week.
Keeping upper days honest
The common failure is the upper session becoming a two-hour march through every muscle above the waist. Lower days have four muscle groups; upper days have six plus abs.
Two fixes:
- Give each upper day an emphasis. Make one press-led and the other pull-led rather than covering everything twice at half effort.
- Cut isolation work you cannot justify. One exercise per muscle "because it is on the list" is how a session doubles in length. Isolation work should go where something is actually behind, which is exactly what a muscle score is for.
Upper lower against the alternatives
| Upper / lower | PPL | Full body | |
|---|---|---|---|
| Natural day count | 4 | 6 (or 3) | 2 to 3 |
| Frequency per muscle | 2 | 2 at six days | 2 to 3 |
| Session length | Medium | Short | Long |
| Schedule tolerance | High, missing one day costs little | Low, rotation drifts | High |
Where BodyLeveling fits
Select Upper / Lower during onboarding, or change it later under Training settings in the Profile tab.
Your scan scores 14 muscle groups from 0 to 100 and returns 3 to 7 priority exercises, ordered so the most lagging area is trained first, each with a placement hint pointing at your next upper or lower session. That matters most on this split, because the upper day is where session length gets away from people. Knowing that your triceps score 63 and your lats 69 is the difference between adding two targeted exercises and adding six out of habit.
Rep ranges target hypertrophy, 8 to 15. BodyLeveling does not write the split itself; it decides what fills it.
Questions
Is upper lower the best four day split?
For most lifters, yes. Four days divides evenly into two upper and two lower sessions, giving every muscle two exposures a week. Push pull legs does not divide cleanly into four days, and a bro split at four days trains each muscle only once.
What goes in an upper day?
Chest, lats, traps, shoulders, biceps and triceps, usually starting with a horizontal or vertical press and a row or pull-up, then adding arm work. Abs and obliques can go at the end of either day.
How do I stop upper days becoming too long?
Alternate emphasis between the two upper sessions rather than covering everything twice. Make one press-led and one pull-led, and keep isolation work to what your scan says is actually lagging instead of one exercise per muscle out of habit.
Can I run upper lower on three or five days?
Yes, by rotating. At three days you alternate across weeks, so one week is upper, lower, upper and the next is lower, upper, lower. At five days you add a fifth session for weak points. Both work; four days remains the cleanest fit.
How does BodyLeveling fit into an upper lower split?
You select Upper / Lower during onboarding, and each recommended exercise arrives with a placement hint pointing at your next upper or lower session, ordered so your most lagging muscle is trained first.
