PHUL Program: Power Hypertrophy Upper Lower Guide

Most programs force you to choose: train for strength or train for size. The PHUL program says you don't have to. Power Hypertrophy Upper Lower is a 4-day split that dedicates two days to heavy compound work and two days to higher-rep hypertrophy training — giving you the best of both worlds.

Here's exactly how to set it up, which exercises to pick, and how to progress.

What Is the PHUL Program?

PHUL stands for Power Hypertrophy Upper Lower. Created by Brandon Campbell, it's a 4-day training split that pairs two "power" days focused on heavy, low-rep compound lifts with two "hypertrophy" days focused on moderate-to-high rep work for muscle growth.

The weekly structure looks like this:

This setup hits every major muscle group twice per week — a frequency that research supports as superior for muscle growth. A meta-analysis by Schoenfeld et al. (2016) found that training each muscle group at least twice per week produced significantly greater hypertrophy compared to once-per-week training.

Why PHUL Works: The Science Behind It

PHUL's design is grounded in a straightforward principle: strength and hypertrophy respond best to different stimuli, but both benefit from the other.

Heavy loading (1–5 reps at 80–90% of your max) primarily drives neural adaptations and maximal strength. Higher-rep work (8–15 reps at moderate loads) maximizes mechanical tension and metabolic stress — the key drivers of muscle growth. Research confirms this distinction: a systematic review by Schoenfeld et al. (2017) found that heavier loads produce superior strength gains, while muscle hypertrophy can be achieved across a broader spectrum of loading ranges.

By splitting your week between both approaches, PHUL lets you:

• Build a stronger foundation — Power days drive up your lifts, which means you can handle heavier loads on hypertrophy days over time
• Maximize muscle stimulus — Hypertrophy days target muscles with enough volume and metabolic stress to grow
• Train each muscle twice per week — The optimal frequency sweet spot for most lifters

If you're following PHUL in Iridium, set up a workout template for each of the four days. Use the AI-Enhanced Targets mode so Iridium dynamically adjusts your weight, rep, and RPE targets each session based on your recent performance and recovery status — meaning your power days automatically get heavier as you get stronger.

Who Should Run PHUL?

PHUL fits a specific type of lifter best:

Ideal for:

• Intermediate lifters (6+ months of consistent training) who want both strength and size
• Lifters transitioning off a beginner linear progression who need more volume
• Anyone who trains 4 days per week and wants a structured, balanced approach

Not ideal for:

• Complete beginners — a simpler 3-day full body program builds a better foundation first
• Advanced lifters who need highly specialized periodization
• Lifters who can only train 2–3 days per week

The PHUL Workout: Exercise Selection

The exercise selection below is a solid starting template. The key principle: power days prioritize heavy compound lifts, while hypertrophy days use a mix of compound and isolation work at moderate loads.

Upper Power

Lower Power

Upper Hypertrophy

Lower Hypertrophy

How to Progress on PHUL

Progression is where programs succeed or fail. PHUL uses a straightforward double progression approach across both day types:

Power Days (Strength Focus)

1. Start at the bottom of the rep range (e.g., 3 reps for 4 × 3–5)
2. Add reps each session until you hit the top of the range across all sets
3. Add weight (5 lbs for upper body, 10 lbs for lower body) and drop back to the bottom of the rep range
4. Repeat

Hypertrophy Days (Growth Focus)

1. Same principle — work from bottom to top of the rep range
2. When you hit the top of the range for all sets, increase weight by the smallest increment available
3. Focus on controlling RPE between 7–9 — leaving 1–3 reps in reserve on most sets

This aligns with research showing that both load progression and rep progression are effective strategies for driving strength and muscle growth (Lopez et al., 2021).

Managing Volume and Recovery

PHUL generates a moderate-to-high training volume — roughly 16–20 sets per muscle group per week for large muscle groups. That's enough to drive growth for most intermediates, but it's close to the upper limit of what many lifters can recover from.

Keep an eye on these signals:

• Strength regression — If your power day numbers are dropping, you're likely under-recovered
• Persistent soreness — Mild soreness is fine; if you're still sore from Monday's upper power when Thursday's upper hypertrophy arrives, something needs adjusting
• Fatigue accumulation — If week-over-week performance is declining, consider a deload week

Understanding your volume landmarks — MEV, MAV, and MRV — helps you know whether you're in the productive training zone or pushing past your recovery capacity. Iridium tracks your weekly sets per muscle group automatically and maps them against these volume landmarks. If you see a muscle group creeping into the red (above MRV), it's time to pull back volume or add a deload.

Common PHUL Mistakes

1. Training too heavy on hypertrophy days. The point of hypertrophy days is volume and controlled tension, not ego PRs. Keep the weight moderate and focus on the muscle working.

2. Skipping the rest day between power and hypertrophy. Running upper power on Monday and upper hypertrophy on Tuesday defeats the purpose. Your muscles need at least 48 hours between sessions targeting the same groups.

3. Adding too much accessory work. PHUL already has solid volume built in. Piling on extra sets is a fast track to burnout. If you want to add something, cut something else first.

4. Neglecting rear delts and rotator cuff work. With heavy pressing twice a week, shoulder health matters. Face pulls, band pull-aparts, and external rotations are cheap insurance.

Making PHUL Your Own

PHUL is a framework, not a rigid prescription. Here are some smart modifications:

• Short on time? Superset opposing muscle groups on hypertrophy days (e.g., curls with pushdowns, rows with lateral raises)
• Weak point training? Swap one isolation exercise for something that targets a lagging muscle group
• Stalling on a lift? Add a pause variation on the hypertrophy day (pause squats, pause bench) to build strength through the sticking point
• Want more athleticism? Add one power clean or push press to the power days

The best version of PHUL is the one that matches your goals, equipment, and schedule. Modify the accessories — but keep the structure.

Start Running PHUL

PHUL is one of the most effective 4-day programs for lifters who want to get stronger and bigger simultaneously. The dual-purpose structure, backed by solid training principles and twice-weekly frequency, makes it a reliable workhorse for intermediate lifters.

The keys to making it work: respect the intent of each day, progress gradually, and monitor your recovery.

Ready to run PHUL? Download Iridium and build your four PHUL templates with AI-Enhanced Targets — so every session is automatically tuned to your current strength and recovery. Track your volume landmarks, log RPE, and let the app handle the math while you handle the iron. image: "/blog/phul-program-guide-hero.png"