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Program

PHAT

PHAT (Power Hypertrophy Adaptive Training) is Layne Norton's hybrid program: two heavy power sessions for the compound lifts, three hypertrophy sessions targeting specific muscle groups. The extra hypertrophy day versus PHUL is the main practical difference.

Goal
general
Experience
intermediate
Schedule
5 days/wk
Duration
Ongoing

How it works

PHAT splits the training week into two phases: two power days dedicated to heavy compound lifts in the 3-5 rep range, and three hypertrophy days dedicated to bodybuilding-style volume in the 8-15 rep range. The power days target strength progression on squat, bench, deadlift, and row. The hypertrophy days target muscle groups (back and shoulders on one day, legs on another, chest and arms on another) with higher rep ranges, pump-oriented work, and isolation movements. The two phases reinforce each other: the strength days drive the compound lifts, and the volume days drive muscle mass that supports further strength progression.

The power days are structured around heavy singles, doubles, and triples on the compound lifts. Upper Power has bench press, barbell row, and overhead variants at 3-5 reps, followed by lower-rep accessory work (weighted dips, weighted pull-ups). Lower Power has squat, deadlift, and a secondary compound (hack squat, Romanian deadlift) in the 3-5 range. The reps are kept low enough that the session remains a strength stimulus rather than a hypertrophy one.

The three hypertrophy days are the volume phase. Back and Shoulders Hypertrophy day has rows, pulldowns, rear delts, side delts, and shrugs in the 8-15 range, 3-5 sets each. Lower Hypertrophy day has front squats, leg press, leg curls, leg extensions, and calf work in similar ranges. Chest and Arms Hypertrophy day has incline press, flys, tricep isolation, and bicep isolation. Each muscle group gets 12-20 weekly sets across the combined power and hypertrophy days.

The program is open-ended, with no fixed endpoint. Lifters run it until the power-day progression stalls, then either deload for a week and continue or switch to a different template. Most lifters on PHAT see strength gains for 4-8 months before needing a programming change, with muscle mass gains continuing throughout if caloric intake supports them.

PHAT is particularly effective for lifters who want measurable strength gains but are not prioritizing competition powerlifting. The extra hypertrophy volume relative to pure strength programs (like 5/3/1 or Sheiko) produces more visible muscle mass, and the two heavy power days maintain the compound-lift progression that pure bodybuilding programs neglect. Lifters whose goal is absolute strength in the compound lifts are usually better served by a dedicated powerlifting program; lifters whose goal is strength and aesthetics together tend to thrive on PHAT.

Main lifts

Movements

One week

Sample week

  1. Day 01

    Day 1 — Upper Power

    Bench Press 3×3-5 · Barbell Row 3×3-5 · Incline Bench 2×6-10 · Weighted Pull-Up 3×6-10 · Skull Crusher 3×6-10

  2. Day 02

    Day 2 — Lower Power

    Squat 3×3-5 · Hack Squat 2×6-10 · Deadlift 3×3-5 · Romanian Deadlift 2×6-10 · Calf Raise 4×6-10

  3. Day 03

    Day 3 — Back and Shoulders Hypertrophy

    Barbell Row 3×8-12 · Lat Pulldown 3×10-15 · Seated Cable Row 3×10-15 · Overhead Press 3×8-12 · Lateral Raise 4×12-15 · Shrug 3×12-15

  4. Day 04

    Day 4 — Lower Hypertrophy

    Front Squat 3×8-12 · Leg Press 3×10-15 · Leg Curl 4×10-15 · Leg Extension 3×12-15 · Seated Calf Raise 4×12-15

  5. Day 05

    Day 5 — Chest and Arms Hypertrophy

    Incline Bench 3×8-12 · Cable Fly 3×10-15 · Dumbbell Press 3×8-12 · Barbell Curl 3×8-12 · Tricep Pushdown 3×10-15 · Hammer Curl 3×10-15

Fine print

Caveats

  • PHAT is five days per week, and the volume on the hypertrophy days is substantial. Lifters whose recovery is compromised (poor sleep, high life stress, caloric deficit) will stall on the power-day progression within 4-6 weeks. The program assumes full recovery support: 8+ hours of sleep, adequate food, and manageable outside-gym stress.
  • The exercise selection on the hypertrophy days is not rigid. The template shows one example but the lifter is expected to rotate exercises within the same rep ranges every 4-6 weeks. Running the exact same hypertrophy exercises for six months produces diminishing returns as the body adapts. Cycling similar movements (barbell row, T-bar row, chest-supported row) maintains the stimulus.
  • Do not run PHAT in a caloric deficit expecting both strength and muscle gain. The program assumes maintenance or a small surplus. Lifters trying to cut weight on PHAT typically lose strength on the power days within a few weeks as glycogen depletes and the heavy loads become unmaintainable.
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