Contents10 sections
PHAT (Power Hypertrophy Adaptive Training) is a five-day program that trains every major muscle group twice a week: once heavy, for strength, and once with higher reps, for size. It was created by Layne Norton, a natural pro bodybuilder and competitive powerlifter with a PhD in nutritional sciences, and it remains one of the best-known powerbuilding programs.
This guide covers how PHAT works, how a training week is laid out, the full Layne Norton PHAT workout day by day, how to progress on it, and who the program suits.
Key Takeaways
- PHAT combines powerlifting-style strength work and bodybuilding-style hypertrophy work in the same week, training each major muscle group twice.
- A week has two power days (upper body, lower body), a rest day, three hypertrophy days (back and shoulders, lower body, chest and arms) and a second rest day.
- Power days use 3-5 reps on the main lifts and 6-10 on assistance work; hypertrophy days open with explosive speed sets at 65-70% of the power-day weight, then move to 8-20 reps.
- Progress with double progression: once you hit the top of a rep range on every set with good form, add a small amount of weight.
- PHAT suits intermediate lifters who can train five days a week; beginners usually progress faster on a simpler program.
What Is PHAT Training?
PHAT stands for Power Hypertrophy Adaptive Training. Norton designed it to blend powerlifting and bodybuilding methods, so you build strength and muscle at the same time instead of switching between separate strength and size phases.
Rather than running low reps for a few weeks and then high reps for a few weeks, PHAT puts both in the same week. The first sessions of the week are heavy and low-rep; the later sessions use lighter loads, more sets and higher reps. This mix of heavy and moderate loads is the core idea behind balancing hypertrophy and strength training.
The logic fits the research. Studies comparing heavy and light loads generally find that heavy loads build more maximal strength, while a wide range of loads builds similar amounts of muscle when sets are taken close to failure. Training with both covers both goals.
Power Days and Hypertrophy Days
PHAT splits training into two types of session:
- Power days: heavy compound lifts for low reps, with long rest periods, to build strength.
- Hypertrophy days: more exercises, more sets, higher reps and shorter rests, to build muscle size.
There are two power days (upper body and lower body) and three hypertrophy days (back and shoulders, lower body, chest and arms). Every major muscle group gets one heavy session and one hypertrophy session each week.
Is Training Each Muscle Twice a Week Too Much?
Training a muscle twice a week is well supported. A 2016 meta-analysis by Schoenfeld and colleagues found that training muscle groups twice a week produced more growth than training them once a week. A later analysis by the same group found that when total weekly volume is equal, frequency itself matters much less: the main benefit of training more often is that it lets you spread more total work across the week.
That does not make PHAT easy. Five sessions a week, two of them heavy and three of them long, add up to a lot of work. Recovery depends on eating enough, sleeping well and not piling extra training on top.
If you are coming from a split that trains each body part once a week, expect more muscle soreness (DOMS) in the first couple of weeks. It usually eases as your body adapts, but some soreness after hard sessions is normal, and it is not a reliable measure of how well you trained.
What Does a PHAT Training Week Look Like?
Here is the standard layout. You can start the week on any day, as long as you keep the order and the two rest days.
| Day | Session | Main work |
|---|---|---|
| Day 1 | Power: upper body | Heavy rows and dumbbell presses (3-5 reps), assistance at 6-10 reps |
| Day 2 | Power: lower body | Heavy squats (3-5 reps), stiff-legged deadlifts and assistance at 5-10 reps |
| Day 3 | Rest | Recovery |
| Day 4 | Hypertrophy: back and shoulders | Speed rows, then 8-20 reps |
| Day 5 | Hypertrophy: lower body | Speed squats, then 8-20 reps |
| Day 6 | Hypertrophy: chest and arms | Speed dumbbell presses, then 8-20 reps |
| Day 7 | Rest | Recovery |
The rest days are placed on purpose. Day 3 separates the heavy lower body session from the first hypertrophy session, and Day 7 lets you recover before the next week’s power days.
Power Days (Days 1 and 2)
Power days are built around heavy compound lifts. The main lifts of each session (bent-over rows and flat dumbbell presses on Day 1, squats on Day 2) are done for 3 sets of 3-5 reps. Assistance lifts such as weighted pull-ups, weighted dips, shoulder presses and leg presses follow for 6-10 reps, and stiff-legged deadlifts for 5-8.
Rest 3-5 minutes between sets of the main lifts. The goal is to move as much weight as you can with good technique, and full rest makes that possible.
Hypertrophy Days (Days 4, 5 and 6)
Days 4, 5 and 6 are bodybuilding sessions. Each one starts with speed work, then moves to higher-rep training: mostly 8-20 reps, 2-4 sets per exercise, with 1-2 minutes of rest between sets. The aim is to build up volume and take the later sets close to failure, especially on isolation exercises.
What Is Speed Work?
Each hypertrophy day opens with the main lift from the matching power day: bent-over rows on Day 4, squats on Day 5 and flat dumbbell presses on Day 6. Use 65-70% of the weight you lifted for 3-5 reps on the power day and do 6-8 sets of 3 reps, moving the weight as fast as you can with good form.
For example, if you rowed 100 kg for 3-5 reps on Day 1, your Day 4 speed sets use about 65-70 kg. These sets are not meant to be hard. They give you extra practice on the main lifts with crisp technique and warm you up for the work that follows.
The Layne Norton PHAT Workout
Below is the full PHAT workout. Sets and reps are working sets; warm up before the first exercise of each session. Where two exercises are listed, pick one.
Day 1: Upper Body Power
| Exercise | Sets x Reps |
|---|---|
| Bent-over rows | 3 x 3-5 |
| Weighted pull-ups | 4 x 6-10 |
| Flat dumbbell presses | 3 x 3-5 |
| Weighted dips | 2 x 6-10 |
| Seated dumbbell shoulder presses | 3 x 6-10 |
| Cambered bar curls | 3 x 6-10 |
| Skull crushers | 3 x 6-10 |
Day 2: Lower Body Power
| Exercise | Sets x Reps |
|---|---|
| Squats | 3 x 3-5 |
| Leg presses or hack squats | 2 x 6-10 |
| Leg extensions | 2 x 6-10 |
| Stiff-legged deadlifts | 3 x 5-8 |
| Lying leg curls | 2 x 6-10 |
| Standing calf raises | 3 x 6-10 |
| Seated calf raises | 2 x 6-10 |
Day 3: Rest
Full rest, or light activity such as walking.
Day 4: Back and Shoulders Hypertrophy
| Exercise | Sets x Reps |
|---|---|
| Bent-over rows (speed work, 65-70% of the Day 1 weight) | 6-8 x 3 |
| Weighted pull-ups | 3 x 8-12 |
| Seated cable rows | 3 x 8-12 |
| Dumbbell rows | 2 x 12-15 |
| Close-grip pulldowns | 2 x 15-20 |
| Seated dumbbell presses | 3 x 8-12 |
| Upright rows | 2 x 12-15 |
| Dumbbell lateral raises | 3 x 12-20 |
Day 5: Lower Body Hypertrophy
| Exercise | Sets x Reps |
|---|---|
| Squats (speed work, 65-70% of the Day 2 weight) | 6-8 x 3 |
| Hack squats or lunges | 3 x 8-12 |
| Leg presses | 2 x 12-15 |
| Leg extensions | 3 x 15-20 |
| Stiff-legged deadlifts | 3 x 8-12 |
| Lying leg curls | 2 x 12-15 |
| Seated leg curls | 2 x 15-20 |
| Standing calf raises | 4 x 10-15 |
| Seated calf raises | 3 x 15-20 |
Day 6: Chest and Arms Hypertrophy
| Exercise | Sets x Reps |
|---|---|
| Flat dumbbell presses (speed work, 65-70% of the Day 1 weight) | 6-8 x 3 |
| Incline dumbbell presses | 3 x 8-12 |
| Hammer Strength or machine chest press | 3 x 12-15 |
| Incline dumbbell or cable flyes | 2 x 15-20 |
| Cambered bar preacher curls | 3 x 8-12 |
| Dumbbell concentration curls | 2 x 12-15 |
| Spider curls | 2 x 15-20 |
| Seated triceps extensions | 3 x 8-12 |
| Rope cable pressdowns | 2 x 12-15 |
| Cable kickbacks | 2 x 15-20 |
Day 7: Rest
Rest before the next week starts with upper body power. Counting speed work, the hypertrophy days come to roughly 24-30 working sets each, so plan on long sessions.
How to Progress on PHAT
PHAT only works if the weights go up over time. A simple way to make sure they do is double progression:
- Pick a weight you can lift for the bottom of the rep range with good form, for example 3 reps on a 3-5 rep power lift.
- Add reps from session to session until you reach the top of the range on every set (5 reps on all three sets).
- Then add a small amount of weight, typically 2.5-5 kg (5-10 lb) on lower body lifts and 1-2.5 kg (2.5-5 lb) on upper body lifts, and build the reps back up.
Use the same rule on hypertrophy days within their rep ranges. When your power-day weights go up, recalculate your speed work so it stays at 65-70% of them.
A few other habits keep progress steady:
- Keep a training log. Without one, you cannot tell whether you are progressing.
- Leave a rep or two in reserve on heavy compound lifts. Grinding to failure on heavy squats and rows adds a lot of fatigue and invites technique breakdown. Push isolation exercises closer to failure instead.
- Plan deloads. Take a lighter week every 6-8 weeks, or sooner if your power-day numbers stall two weeks in a row or you feel run down. Cut sets roughly in half, lighten the loads, then resume.
- Change exercises only for a reason. Swap a movement when it causes pain or has stopped progressing for several weeks, not for the sake of variety.
Who Is PHAT For?
PHAT is an intermediate program. It suits you if:
- You have trained consistently for at least a year or two and can no longer add weight to the bar every session. Not sure where you stand? See are you a beginner, intermediate or advanced lifter.
- You want both strength and size, the classic powerbuilding goal.
- You can train five days a week and have time for long hypertrophy sessions.
- You can eat and sleep well enough to recover from that volume.
It is a poorer fit if:
- You are a beginner. Simpler full-body or upper/lower programs let you add weight almost every session with far less volume.
- You can only train three or four days a week. Skipping sessions breaks the heavy/light structure; a four-day upper/lower program fits better.
- You are preparing for a powerlifting meet. As written, PHAT has no barbell bench press or conventional deadlift among its main lifts, so it gives limited practice on the competition lifts.
- You are in a hard calorie deficit, under heavy stress or short on sleep. You can still run PHAT, but expect to cut volume, for example by dropping one or two isolation exercises from each hypertrophy day.
Recovery: Food and Sleep
PHAT’s volume is high, so recovery is part of the program. A protein intake of roughly 1.6-2.2 g per kg of body weight per day, enough total calories to support your training, and 7-9 hours of sleep a night give you the best chance of progressing. If your goal is size, a small calorie surplus makes the hypertrophy days far more productive.
Creatine monohydrate is the best-researched supplement for strength and muscle gain and fits well with a program like PHAT. Our guide to creatine monohydrate powders covers what to look for.
The Bottom Line
PHAT is a well-structured way to train for strength and size in the same week: two heavy power days, three higher-volume hypertrophy days, and every major muscle group trained twice.
- It works best for intermediate lifters who can train five days a week and recover from long hypertrophy sessions.
- Progress comes from steady, logged increases in weight and reps, not constant variety: use double progression and plan deloads.
- Beginners and lifters with only three or four training days usually do better on a simpler program first.
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