---

id: phat
name: PHAT (Power Hypertrophy Adaptive Training)
aliases: [PHAT, Layne Norton PHAT, power hypertrophy adaptive training]
category: program
system: bodybuilding
goal: Simultaneously develop maximal strength on compound lifts and accumulate hypertrophy volume, using heavy power days to build strength and dedicated hypertrophy days to maximize muscle growth
goals: [hypertrophy, strength]
level: advanced
duration_weeks: 12
frequency_per_week: 5
periodization: undulating
origin: classic
progression_model: >
  Power days: linear progression. Add 2.5 kg (upper body) or 5 kg (lower body) when all
  working sets are completed in the prescribed range. Hypertrophy days: double-progression.
  Advance within the rep range before adding load. Deload every 6 weeks: reduce working
  sets by 40%, maintain intensity.

exercises:
  - ref: bench_press
    role: primary
    frequency_per_week: 2
    technical_notes: >
      Upper Power (Day 1): 3–4 × 3–5 at ~85–90% 1RM. Primary horizontal push strength
      movement. Chest/Arms Hypertrophy (Day 5): 4 × 8–12 flat or slight decline.

  - ref: bent_over_barbell_row
    role: primary
    frequency_per_week: 2
    technical_notes: >
      Upper Power (Day 1): 3–4 × 3–5. Heavy overhand row; maintain 45° torso angle.
      Back/Shoulders Hypertrophy (Day 3): 4 × 8–12 as volume work.

  - ref: pullups
    role: primary
    frequency_per_week: 2
    technical_notes: >
      Upper Power (Day 1): 2–3 × 3–5 weighted. Adds plates via belt.
      Back/Shoulders Hypertrophy (Day 3): 3 × 8–12 bodyweight or light load.

  - ref: overhead_press
    role: primary
    frequency_per_week: 1
    technical_notes: >
      Upper Power (Day 1): 2–3 × 5–8. Secondary pressing compound on power day.
      Standing strict press preferred.

  - ref: incline_dumbbell_press
    role: secondary
    frequency_per_week: 2
    technical_notes: >
      Upper Power (Day 1): 3 × 6–10. Back/Shoulders Hypertrophy (Day 3): replaced
      by lateral raise accessory. Chest/Arms Hyp (Day 5): 3 × 8–12.

  - ref: back_squat
    role: primary
    frequency_per_week: 2
    technical_notes: >
      Lower Power (Day 2): 3–4 × 3–5 at ~85–90% 1RM. Primary squat compound.
      Lower Hypertrophy (Day 4): 4 × 8–12 at moderate load.

  - ref: romanian_deadlift
    role: secondary
    frequency_per_week: 2
    technical_notes: >
      Lower Power (Day 2): 2–3 × 5–8. Posterior chain strength accessory.
      Lower Hypertrophy (Day 4): 3 × 8–12.

  - ref: leg_press
    role: secondary
    frequency_per_week: 2
    technical_notes: >
      Lower Power (Day 2): 2 × 10–15 following squat.
      Lower Hypertrophy (Day 4): 3 × 12–15 as quad volume.

  - ref: seated_leg_curl
    role: secondary
    frequency_per_week: 2
    technical_notes: >
      Lower Power (Day 2): 3 × 6–10. Lower Hypertrophy (Day 4): 3 × 10–15.
      Hamstring isolation, both days.

  - ref: leg_extensions
    role: secondary
    frequency_per_week: 1
    technical_notes: >
      Lower Hypertrophy (Day 4): 3 × 12–15. Quad pump finisher; full extension.

  - ref: seated_cable_rows
    role: secondary
    frequency_per_week: 1
    technical_notes: >
      Back/Shoulders Hypertrophy (Day 3): 3 × 8–12. Mid-back and rhomboid volume.
      Close-grip handle.

  - ref: side_lateral_raise
    role: secondary
    frequency_per_week: 1
    technical_notes: >
      Back/Shoulders Hypertrophy (Day 3): 4 × 12–15. Lateral deltoid isolation.

  - ref: face_pull
    role: secondary
    frequency_per_week: 1
    technical_notes: >
      Back/Shoulders Hypertrophy (Day 3): 3 × 15–20. Rear delt and external
      rotation health maintenance. High rope attachment; pull to face.

  - ref: front_dumbbell_raise
    role: secondary
    frequency_per_week: 1
    technical_notes: >
      Back/Shoulders Hypertrophy (Day 3): 2 × 12–15. Anterior deltoid accessory.

  - ref: ez_bar_skullcrusher
    role: secondary
    frequency_per_week: 1
    technical_notes: >
      Chest/Arms Hypertrophy (Day 5): 3 × 8–12. Triceps long-head emphasis.
      Lower to forehead; full extension.

  - ref: triceps_pushdown
    role: secondary
    frequency_per_week: 1
    technical_notes: >
      Chest/Arms Hypertrophy (Day 5): 3 × 10–15. Rope or straight bar.
      Lateral head pump finisher.

  - ref: barbell_curl
    role: secondary
    frequency_per_week: 1
    technical_notes: >
      Chest/Arms Hypertrophy (Day 5): 3 × 8–12. Primary bicep compound.

  - ref: hammer_curls
    role: secondary
    frequency_per_week: 1
    technical_notes: >
      Chest/Arms Hypertrophy (Day 5): 3 × 10–15. Brachialis development.

  - ref: preacher_curl
    role: secondary
    frequency_per_week: 1
    technical_notes: >
      Chest/Arms Hypertrophy (Day 5): 2 × 10–15. Distal bicep development.

  - ref: seated_calf_raise
    role: secondary
    frequency_per_week: 2
    technical_notes: >
      Lower Power (Day 2): 2 × 12–15. Lower Hypertrophy (Day 4): 3 × 12–15.
      Soleus-dominant calf work.

sources:
  - title: "PHAT Program"
    author: "Norton, L."
    year: 2011
    publisher: "EliteFTS / Layne Norton PhD"
    credibility: practitioner
  - title: "Resistance Training Volume Enhances Muscle Hypertrophy but Not Strength in Trained Men"
    author: "Schoenfeld, B. J., Contreras, B., Krieger, J., et al."
    year: 2019
    journal: "Medicine & Science in Sports & Exercise"
    volume: 51
    issue: 1
    pages: "94-103"
    doi: "10.1249/MSS.0000000000001764"
    credibility: rct
---

# PHAT (Power Hypertrophy Adaptive Training)

Designed by Layne Norton, PHAT allocates the training week into two dedicated power days and three hypertrophy days. Power days develop maximal strength on the competition lifts at sub-5 rep intensities; hypertrophy days follow the same movement patterns at higher volume and moderate loads. The logic is that high-strength individuals have more contractile tissue to stimulate hypertrophy from, and maintaining strength alongside hypertrophy work prevents the detraining of neural efficiency that occurs on pure bodybuilding splits.

## Who This Is For

- Trainees who have run intermediate programs (PPL, PHUL) and have stalled on linear progression
- Those who want to develop both competition-level strength and aesthetics simultaneously
- Minimum baseline: Squat ≥ 1.5× BW, Bench ≥ 1× BW, Row ≥ 1× BW

## Weekly Schedule

| Day | Focus |
|-----|-------|
| Monday | Upper Body Power |
| Tuesday | Lower Body Power |
| Wednesday | Rest |
| Thursday | Back & Shoulders Hypertrophy |
| Friday | Lower Body Hypertrophy |
| Saturday | Chest & Arms Hypertrophy |
| Sunday | Rest |

## Upper Body Power (Monday)

| Exercise | Sets × Reps |
|----------|-------------|
| Bench Press | 3–4 × 3–5 |
| Weighted Pull-ups → Bent-over Row | 2–3 × 3–5 |
| Overhead Press | 2–3 × 5–8 |
| Incline Dumbbell Press | 3 × 6–10 |
| Barbell Curl | 3 × 6–10 |

## Lower Body Power (Tuesday)

| Exercise | Sets × Reps |
|----------|-------------|
| Back Squat | 3–4 × 3–5 |
| Romanian Deadlift | 2–3 × 5–8 |
| Leg Press | 2 × 10–15 |
| Seated Leg Curl | 3 × 6–10 |
| Seated Calf Raise | 2 × 12–15 |

## Back & Shoulders Hypertrophy (Thursday)

| Exercise | Sets × Reps |
|----------|-------------|
| Pull-ups | 3 × 8–12 |
| Bent-over Row | 4 × 8–12 |
| Seated Cable Row | 3 × 8–12 |
| Side Lateral Raise | 4 × 12–15 |
| Face Pull | 3 × 15–20 |
| Front Dumbbell Raise | 2 × 12–15 |

## Lower Body Hypertrophy (Friday)

| Exercise | Sets × Reps |
|----------|-------------|
| Back Squat | 4 × 8–12 |
| Romanian Deadlift | 3 × 8–12 |
| Leg Press | 3 × 12–15 |
| Leg Extensions | 3 × 12–15 |
| Seated Leg Curl | 3 × 10–15 |
| Seated Calf Raise | 3 × 12–15 |

## Chest & Arms Hypertrophy (Saturday)

| Exercise | Sets × Reps |
|----------|-------------|
| Bench Press | 4 × 8–12 |
| Incline Dumbbell Press | 3 × 8–12 |
| EZ Bar Skull Crusher | 3 × 8–12 |
| Triceps Pushdown | 3 × 10–15 |
| Barbell Curl | 3 × 8–12 |
| Hammer Curls | 3 × 10–15 |
| Preacher Curl | 2 × 10–15 |

## Progression

- **Power days**: when all sets hit the top of the rep range, add 2.5 kg (upper) / 5 kg (lower) at the next power session
- **Hypertrophy days**: double-progression within rep range, then add load
- **Deload (Week 7)**: drop to 60% of normal working sets; maintain intensity; resume week 8 at full volume

> Prerequisite intermediate programs: `phul`, `push_pull_legs`. Nutrition at this training age: `energy_balance`, `protein_requirements`.