Upper Lower Split: How to Program 4 Days a Week

To put it simply: an upper lower split alternates two upper-body days and two lower-body days across a 4-day week, giving each half of the body two dedicated sessions with a rest day worked in. It sits between full-body training (more frequency, less volume per session) and a 5-6 day body-part split (more volume, less frequency), which makes it a strong middle-ground for intermediate lifters.

Why 4 Days Hits a Sweet Spot

Training each muscle group twice a week gives you enough frequency to keep skill and strength moving forward on your main lifts, while the reduced number of exercises per session compared to a 6-day split means you can go heavier without burning out. Four days also leaves three rest days to distribute around work and life commitments - most people can find a Monday/Tuesday/Thursday/Friday or similar layout that fits.

The 4-Day Program

Run the days in order Upper A, Lower A, rest, Upper B, Lower B, then two rest days. Adjust weight so the last set of each exercise is genuinely hard but leaves 1-2 reps in reserve.

Comparing Upper Lower to Other Splits

Against full body, upper lower lets you dedicate a full session to each half of the body, which usually means more total exercises per muscle group per session and better focus. Against a 5-6 day body-part split, upper lower trades some peak volume for the ability to recover fully between sessions and train fewer days overall. For most people balancing training with a job or family, four focused days beats six shorter ones simply on adherence.

Adjusting the Split for Your Schedule

If you can only manage 3 days some weeks, drop Upper B and run Upper A, Lower A, Lower B - you'll lose a little upper-body volume but keep lower-body frequency intact. If you have 5 days available, add a short arm and core-focused session as a fifth day rather than turning this into a full 5-day split, since the core 4-day structure already covers the major lifts well.

What to Wear Across Upper and Lower Days

Upper and lower days ask different things of your gear - shoulder mobility on press days, hip range on squat and deadlift days. The Men's Performance Regular Fit T-Shirt, at 180 g/m2 in 92% polyester and 8% spandex, moves cleanly through overhead pressing on upper days. On lower days, the Men's Tapered Leg Drawstring Joggers at 330 g/m2 hold their structure under heavy squat and deadlift loads, and the Men's Piping Straight Leg Sweatpants at 285 g/m2 work well for colder-weather lower sessions. See the full range in men's activewear.

FAQ

Is upper lower better than push pull legs?

Neither is strictly better - upper lower needs only 4 days and suits people with less gym time, while PPL needs 6 days and provides more total weekly volume. Pick based on how many days you can realistically commit to each week.

Can beginners run an upper lower split?

Yes, upper lower works well for beginners since the 4-day frequency lets you practice main lifts twice a week without the higher volume demands of a 6-day split. It's often an easier entry point than full-body for people who prefer more exercises per session.

How much rest do I need between upper and lower days?

You don't need a rest day between an upper day and a lower day since they train different muscle groups, but build in at least one full rest day somewhere in the 4-day week. Two rest days, as in the sample layout above, works well for most schedules.

Should I train abs on upper or lower days?

Either works - add 2-3 core exercises to the end of your upper days if you prefer training abs when your legs are less fatigued, or tack them onto lower days if that fits your schedule better. Consistency in placement matters more than which specific day you choose.