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 manageβlog 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 1β5 rep range), prioritize hypertrophy (more sets in the 8β15 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 30β50% 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 overtrainingβa 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)| Day | Session |
|---|---|
| Monday | Upper A (Strength) |
| Tuesday | Lower A (Squat) |
| Wednesday | Rest |
| Thursday | Upper B (Hypertrophy) |
| Friday | Lower B (Hinge) |
| Sat/Sun | Rest |
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.| Exercise | Sets | Reps | % of 1RM | Rest |
|---|---|---|---|---|
| Barbell Bench Press | 4 | 4β6 | 80β87.5% | 3β4 min |
| Weighted Pull-Up or Barbell Row | 4 | 4β6 | 80β87.5% | 3β4 min |
| Overhead Press | 3 | 5β6 | 75β80% | 2β3 min |
| Barbell Row (if pull-up was primary) | 3 | 6β8 | 70% | 2 min |
| Face Pull | 3 | 15β20 | Light | 60 sec |
| Tricep Pushdown | 2 | 12β15 | Moderate | 60 sec |
Lower Day A: Squat Focus
Primary objective: Build squat strength and quad/glute development through squatting and squat-pattern accessories.| Exercise | Sets | Reps | % of 1RM | Rest |
|---|---|---|---|---|
| Back Squat | 4 | 4β6 | 80β87.5% | 3β4 min |
| Romanian Deadlift | 3 | 8β10 | 55β65% of DL | 2β3 min |
| Leg Press | 3 | 10β12 | Moderate | 2 min |
| Leg Curl | 3 | 10β12 | Moderate | 90 sec |
| Calf Raise | 4 | 15β20 | Moderate | 60 sec |
Upper Day B: Hypertrophy Focus
Primary objective: Accumulate volume on pressing and pulling muscles with moderate weights and higher reps.| Exercise | Sets | Reps | Load | Rest |
|---|---|---|---|---|
| Incline Dumbbell Press | 4 | 8β12 | Moderate-hard | 2 min |
| Cable or Machine Row | 4 | 10β12 | Moderate-hard | 2 min |
| Dumbbell Shoulder Press | 3 | 10β12 | Moderate | 90 sec |
| Lat Pulldown | 3 | 10β12 | Moderate | 90 sec |
| Dumbbell Lateral Raise | 3 | 15β20 | Light | 60 sec |
| Bicep Curl | 3 | 12β15 | Light-moderate | 60 sec |
| Overhead Tricep Extension | 3 | 12β15 | Light-moderate | 60 sec |
Lower Day B: Hinge Focus
Primary objective: Build deadlift strength and posterior chain development through hip-hinge patterns.| Exercise | Sets | Reps | % of 1RM | Rest |
|---|---|---|---|---|
| Conventional Deadlift | 4 | 4β6 | 80β87.5% | 3β4 min |
| Front Squat or Hack Squat | 3 | 8β10 | Moderate | 2β3 min |
| Good Morning | 3 | 10β12 | Light (50β60% squat) | 2 min |
| Leg Curl | 4 | 10β15 | Moderate | 90 sec |
| Glute Bridge or Hip Thrust | 3 | 12β15 | Moderate | 90 sec |
| Calf Raise | 3 | 15β20 | Moderate | 60 sec |
Progression Models
Linear Progression (best for 0β6 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 6β18+ months on the split): Work within a rep range (e.g., 4β6 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 5β10 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 performanceβlast week's weights, sets, and repsβdirectly 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.