4-Day Upper/Lower Power-Hypertrophy vs 5-Day Power + 3-Day Hypertrophy Split
PHUL (4-Day) vs Layne Norton's PHAT (5-Day)
Both programs blend heavy 3–5 rep power days with 8–15 rep bodybuilding hypertrophy days. PHUL fits into 4 Upper/Lower days, while Layne Norton’s PHAT uses 2 Upper/Lower Power days plus a 3-day Back/Shoulders, Legs, and Chest/Arms hypertrophy split.
| Feature | PHUL (Power Hypertrophy Upper Lower) | PHAT (Power Hypertrophy Adaptive Training) |
|---|---|---|
| Experience Level | Intermediate | Intermediate |
| Weekly Frequency | 4 days / week | 5 days / week |
| Cycle Length | 12 weeks | 8 weeks |
| Primary Focus | Upper/lower strength and muscle | 5-day Power Hypertrophy Adaptive Training (Powerbuilding) |
| Progression Rule | Choose and log working weights for the prescribed reps. Review them as performance changes; the template does not automatically implement double progression or a deload. | Loads follow the supplied set and percentage schedule. There is no automatic increase after each session; review your reference weights before repeating the cycle. Guided starting weights remain under your control. |
| Required 1RM Inputs | Working weights (no 1RM required) | Squat, Bench Press, Deadlift, Overhead Press, Barbell Row, Front Squat |
Choose PHUL (Power Hypertrophy Upper Lower) When…
- You want 3 full rest days per week on a clean 4-day Upper/Lower schedule.
- You want 60-minute workouts that balance strength and aesthetics.
Best For: Lifters who want lower-rep and higher-rep sessions and can choose appropriate working loads.
Choose PHAT (Power Hypertrophy Adaptive Training) When…
- You want more specialized bodybuilding isolation volume for Back/Shoulders and Chest/Arms across 5 days.
- You enjoy speed/explosive sets at 65%–70% at the start of hypertrophy days.
Best For: Intermediate lifters combining 2 heavy Upper/Lower Power days (3–5 reps) with 3 high-volume bodybuilding hypertrophy days.
Exercise Selection Comparison
Frequently Asked Questions
Is PHUL basically a 4-day version of PHAT?
Yes—Brandon Campbell created PHUL to capture the exact Power + Hypertrophy synergy of Layne Norton’s 5-day PHAT inside a 4-day Upper/Lower split.
Which has higher weekly set volume: PHUL or PHAT?
PHAT has roughly 25%–30% more weekly accessory sets because it spreads upper-body hypertrophy across two dedicated days instead of one.