Quick Answer: A 4-day upper/lower strength split trains each muscle group twice per week with a dedicated mix of heavy strength work and hypertrophy volume. It is the most popular program structure for intermediate lifters who want to build both size and strength without training six days per week. Gladiator Lift makes the alternating A/B day structure effortless to manageβ€”log once and the app remembers which workout comes next.

What Is Upper/Lower Training?

The upper/lower split divides workouts into two categories: days focused on the upper body (chest, back, shoulders, arms) and days focused on the lower body (quads, hamstrings, glutes, calves). Each category is trained twice per week in a four-day schedule.

This structure emerged from sports science research showing that training a muscle group twice per week produces significantly better hypertrophy and strength outcomes than once-per-week body-part splits. Elite programs like GZCLP, Lyle McDonald's Generic Bulking Routine, and Greg Nuckols's beginner/intermediate programs all use upper/lower as a foundational structure.

The split's flexibility is another advantage: you can prioritize strength (more sets in the 1–5 rep range), prioritize hypertrophy (more sets in the 8–15 rep range), or blend both. The template in this guide uses an A/B approach where each day type alternates between a strength-focused and a hypertrophy-focused session.

Why 4 Days Per Week?

Frequency is one of the most robust predictors of strength and muscle gain in the research literature. Training each muscle group twice per week (rather than once) produces 30–50% greater gains in most studies.

The 4-day schedule balances frequency with recovery. Three days is enough for recovery, four days maximizes training stimulus without exceeding recovery capacity for most lifters. Six-day programs (like PPL) can work, but the additional training days must come with reduced per-session volume to avoid overtrainingβ€”a balance most people find difficult to maintain.

Four days per week hits a practical sweet spot: high enough frequency for rapid adaptation, low enough volume-per-session to train with high intensity, and compatible with a normal work/life schedule.

Program Structure

Weekly Schedule (Option A: Mon/Tue/Thu/Fri)
DaySession
MondayUpper A (Strength)
TuesdayLower A (Squat)
WednesdayRest
ThursdayUpper B (Hypertrophy)
FridayLower B (Hinge)
Sat/SunRest

The A sessions are heavier and lower-rep, prioritizing neural strength adaptation. The B sessions use moderate weights and higher reps, prioritizing hypertrophy and volume accumulation.

Upper Day A: Strength Focus

Primary objective: Build maximal pressing and pulling strength through compound movements at high intensity.
ExerciseSetsReps% of 1RMRest
Barbell Bench Press44–680–87.5%3–4 min
Weighted Pull-Up or Barbell Row44–680–87.5%3–4 min
Overhead Press35–675–80%2–3 min
Barbell Row (if pull-up was primary)36–870%2 min
Face Pull315–20Light60 sec
Tricep Pushdown212–15Moderate60 sec
Progression: Add 5 lb to bench and row when you complete all sets at the top of the rep range for two consecutive sessions.

Lower Day A: Squat Focus

Primary objective: Build squat strength and quad/glute development through squatting and squat-pattern accessories.
ExerciseSetsReps% of 1RMRest
Back Squat44–680–87.5%3–4 min
Romanian Deadlift38–1055–65% of DL2–3 min
Leg Press310–12Moderate2 min
Leg Curl310–12Moderate90 sec
Calf Raise415–20Moderate60 sec
Progression: Add 5–10 lb to squat every session or every other session depending on training experience.

Upper Day B: Hypertrophy Focus

Primary objective: Accumulate volume on pressing and pulling muscles with moderate weights and higher reps.
ExerciseSetsRepsLoadRest
Incline Dumbbell Press48–12Moderate-hard2 min
Cable or Machine Row410–12Moderate-hard2 min
Dumbbell Shoulder Press310–12Moderate90 sec
Lat Pulldown310–12Moderate90 sec
Dumbbell Lateral Raise315–20Light60 sec
Bicep Curl312–15Light-moderate60 sec
Overhead Tricep Extension312–15Light-moderate60 sec
Progression: Use double progressionβ€”add one rep per session until you hit the top of the rep range, then increase weight by 5–10 lb and return to the bottom of the range.

Lower Day B: Hinge Focus

Primary objective: Build deadlift strength and posterior chain development through hip-hinge patterns.
ExerciseSetsReps% of 1RMRest
Conventional Deadlift44–680–87.5%3–4 min
Front Squat or Hack Squat38–10Moderate2–3 min
Good Morning310–12Light (50–60% squat)2 min
Leg Curl410–15Moderate90 sec
Glute Bridge or Hip Thrust312–15Moderate90 sec
Calf Raise315–20Moderate60 sec
Progression: Add 10 lb to deadlift every session or every other session for the first several months. Transition to weekly jumps when session-to-session gains stall.

Progression Models

Linear Progression (best for 0–6 months on the split): Add a fixed amount of weight every session or every other session. Works until sessions-to-session recovery becomes insufficient. Double Progression (best for 6–18+ months on the split): Work within a rep range (e.g., 4–6 reps). Add one rep per session. When you consistently hit the top of the range (6 reps) across all sets for two sessions, increase weight by 5–10 lb and return to 4 reps. Wave Loading (for advanced lifters): Alternate between heavier-lower-rep A weeks and lighter-higher-rep B weeks. Over time, the B week's "lighter" weights become heavier than the previous A week's, creating a natural upward progression cycle.

Tracking with Gladiator Lift

The alternating A/B structure of upper/lower training is where Gladiator Lift adds immediate value. Set up your four workouts (Upper A, Lower A, Upper B, Lower B) once in the app, and it tracks which session is next in the rotation automatically.

Each session, Gladiator Lift displays your previous performanceβ€”last week's weights, sets, and repsβ€”directly alongside your current session, making it effortless to implement double progression. The app's built-in volume tracking across both upper and both lower sessions shows total weekly volume per muscle group, helping you identify imbalances before they become weaknesses.

Use Gladiator Lift's progress charts to monitor your compound lift e1RMs over time. When squat and deadlift e1RMs are climbing but bench press is stagnant, it's a clear signal to add an extra working set on Upper A or increase the weight on Upper B sessions.