If you can train 4 days per week, the upper/lower split is your best option. Every muscle hit 2x/week — optimal per Schoenfeld (2016) — in sessions under 75 minutes.
2x frequency: Mon upper, Tue lower, Thu upper, Fri lower. Every muscle twice per week.
Manageable sessions: ~18-20 sets per session, 60-75 minutes including rest.
Recovery: 48-72h between same-muscle sessions. Wed + weekend rest.
| Exercise | Sets x Reps | RIR | Rest |
|---|---|---|---|
| Bench press | 4 x 6 | 2/2/1/1 | 180s |
| Barbell row | 4 x 8 | 2/1/1/1 | 150s |
| Incline DB press | 3 x 10 | 2/1/1 | 150s |
| Lateral raise | 3 x 15 | 1/0/0 | 90s |
| Tricep + Bicep | 2 x 12 each | 1/0 | 90s |
| Exercise | Sets x Reps | RIR | Rest |
|---|---|---|---|
| Squat | 4 x 6 | 2/2/1/1 | 180s |
| Romanian deadlift | 3 x 10 | 2/1/1 | 180s |
| Leg press | 3 x 12 | 1/1/0 | 150s |
| Leg curl | 3 x 12 | 1/0/0 | 120s |
| Calf raise | 3 x 15 | 1/0/0 | 90s |
Upper B (Thu) and Lower B (Fri) use different exercises for variation (Fonseca 2014). Upper B: OHP focus. Lower B: hip hinge focus (deadlift, Bulgarian split squat, hip thrust).
| Split | Days | Frequency | Best for |
|---|---|---|---|
| Full body | 3 | 3x | Beginners |
| Upper/Lower | 4 | 2x | Most lifters |
| PPL | 6 | 2x | Advanced |
The beauty of upper/lower at 4 days is that each exercise appears twice per week with variation. Day A uses different exercises than Day B (Fonseca 2014). This means every muscle receives stimulation from multiple angles across the week while still allowing progressive overload tracking per exercise.
Progression strategy: Add 1 rep or 2.5kg per session. When you hit the top of your rep range (e.g., 4×8 becomes 4×10), increase weight and reset to the bottom (4×8 at higher weight). If an exercise stalls for 3+ sessions, rotate to a biomechanically similar variation.
The upper/lower split lends itself perfectly to mesocycle periodization (Painter 2012):
| Weeks | Phase | Sets per upper session | Sets per lower session |
|---|---|---|---|
| 1-2 | MEV | 14-16 | 14-16 |
| 3-4 | MAV | 18-20 | 18-20 |
| 5-6 | Approaching MRV | 20-22 | 20-22 |
| 7 | Deload | 10-12 | 10-12 |
During weeks 1-2, muscles are sensitized from the deload — even moderate volume drives growth. By weeks 5-6, volume is near maximum and fatigue is accumulating strategically. The deload week allows supercompensation before the next mesocycle.
Neglecting legs: Upper body days feel more exciting, but legs contain the largest muscles in your body. Quads, hamstrings, and glutes together represent roughly 40% of your total muscle mass. Skipping or half-heartedly doing lower days sabotages your overall development.
Too much arm isolation: Arms already receive 4-6 fractional sets from compounds (pressing trains triceps, pulling trains biceps). Adding 2-3 direct arm sets per upper session is enough — loading 6+ curl variations steals recovery from more important exercises.
Same exercises on both upper days: Upper A and B should use different exercises (Fonseca 2014). If Monday is flat bench, Thursday should be incline DB press. If Monday starts with barbell row, Thursday should start with pull-ups. Variation drives more hypertrophy than repetition.
Insufficient rest on compounds: Schoenfeld (2016) showed that 3-minute rest periods build more muscle than 1-minute on compound movements. Take the full rest — quality per set matters more than total workout duration.
| Goal | Adjustment |
|---|---|
| Muscle growth (bulk) | Volume at upper MAV range, RIR 1-2, caloric surplus +200-350 |
| Body recomposition | Maintain MAV volume, RIR 2, slight deficit -200-300 |
| Strength focus | Lower reps (3-6), heavier weight, longer rest (3-5 min) |
| Fat loss (cut) | Maintain volume (!), RIR 2-3, protein at 2.0-2.2g/kg |
The structure stays the same for all goals — only intensity, volume, and nutrition change. This is why upper/lower is the most versatile split for the majority of lifters.
Excellent. 2x frequency with adequate volume. Schoenfeld (2016) found no benefit from 3x vs 2x — making U/L as effective as full body.
4 days = upper/lower. 5-6 days = PPL. Both work when volume is equated. Best split is the one you stick to.
Yes, alternating weeks. But full body is better at 3 days.
MUSCLE TECHNICS selects the optimal split and generates exercise distribution automatically.
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