PHUL — Power Hypertrophy Upper Lower — is a four-day program that runs an upper/lower split but assigns two of the days to heavy, low-rep “power” work and two to higher-rep “hypertrophy” work. You get a power upper day, a power lower day, a hypertrophy upper day, and a hypertrophy lower day. The idea is to build strength and size at the same time by dedicating separate sessions to each quality while still training every muscle twice a week.
If you want a structured four-day program that develops both strength and muscle without forcing you to choose between them, PHUL is a well-balanced option. It suits intermediates who’ve moved past pure beginner programs and want something that keeps their big lifts climbing while adding size. It’s less ideal if your only goal is maximum hypertrophy, since two of your four weekly sessions are spent on low-rep strength work that isn’t the most direct route to growth.
How the program works
The program splits the week by quality, not just by body region. Power days use heavy compound lifts in lower rep ranges — think three to five reps on squats, benches, rows, and deadlifts — to build maximal strength. Hypertrophy days use moderate to higher reps, eight to fifteen, on a wider range of exercises including more isolation work, to drive size. Because both an upper and a lower day exist for each quality, every muscle is trained twice a week: once heavy, once with more volume.
This structure sits in a useful middle ground. Pure strength programs like 5/3/1 undertrain volume for size, while pure bodybuilding splits neglect heavy work. PHUL tries to capture both by scheduling them separately, so neither interferes much with the other within a session. The full range of rep work also covers more of the effective rep range for muscle.
A sample week
- Monday — Power Upper: bench press, barbell row, overhead press, pull-up, heavy for 3–5 reps
- Tuesday — Power Lower: squat, deadlift, heavy for 3–5 reps, plus calves and abs
- Thursday — Hypertrophy Upper: incline dumbbell press, cable row, lateral raise, flyes, curls, triceps, 8–15 reps
- Friday — Hypertrophy Lower: front squat or leg press, Romanian deadlift, leg extension, leg curl, calf raise, 8–15 reps
- Wed / Sat / Sun — Rest
The power days build the numbers; the hypertrophy days build the size. See the exercise library for substitutions.
Who it’s for
PHUL suits intermediate lifters who want both strength and size and like the clean logic of an upper/lower structure. It’s a natural next step for someone who ran a beginner strength program, got their main lifts moving, and now wants to add more muscle without abandoning heavy training. Four days a week is a realistic commitment for most people, and the twice-weekly frequency per muscle is solid.
It’s less suited to complete beginners, who don’t yet need separate power and hypertrophy days and would do better with a simpler full-body program. It’s also not the fastest route for someone who only cares about size — dedicating half the week to heavy low-rep work means less total hypertrophy volume than a program that spends all four days on moderate-rep training.
Pros and cons
The strengths: balanced development of strength and size, twice-weekly frequency, a clear and motivating structure, and a sensible mix of heavy compounds and higher-rep accessory work.
The drawbacks: for pure hypertrophy it’s a compromise, since the power days aren’t the most efficient use of a session if size is all you want. The fixed rep prescriptions also don’t adjust to how you’re recovering, and the heavy power days add fatigue that has to be managed carefully across the week. It’s a good all-rounder, not a specialist.
How it fits an adaptive approach
PHUL is a fixed template that hard-codes which days are heavy and which are high-rep, and it prescribes rep ranges without knowing how your last session went or how much volume you personally need. It splits strength and size by the calendar rather than by what your recovery and progress actually call for.
An adaptive hypertrophy program pursues the same goal — building size with enough heavy work to keep getting stronger — but calibrates the mix to you. Rather than assign fixed rep counts, Checkfit sets each weight from your reps in reserve, blends heavier and lighter work across the muscles’ effective rep ranges, adjusts training volume to your recovery, and schedules deloads inside a six-week mesocycle built on progressive overload. It’s the strength-plus-size balance of PHUL, adapted to you. See how at checkfit.com.
