PHAT Calculator
Build a Power Hypertrophy Adaptive Training week from your lifts, recovery, session time, and volume targets, then estimate weekly hard sets, tonnage, training maxes, and deload pressure.
📌Presets
Presets load realistic PHAT profiles and calculate immediately. Adjust volume slowly if soreness, sleep, or lift speed changes.
⚙Calculator
PHAT weekly plan
Enter your stats and training targets to calculate the PHAT setup.
📊Fitness Metrics
📑Reference Tables
| PHAT Day | Main Focus | Common Sets | Load Range |
|---|---|---|---|
| Upper power | Bench, row, press | 3-5 x 3-5 | 80-90% 1RM |
| Lower power | Squat and hinge | 3-5 x 3-5 | 80-90% 1RM |
| Back and shoulders | Volume pulling | 3-5 x 8-15 | 60-75% 1RM |
| Lower hypertrophy | Quads, hams, calves | 3-5 x 8-20 | 55-75% 1RM |
| Chest and arms | Pressing and isolation | 3-5 x 8-15 | 60-75% 1RM |
| Volume Read | Weekly Sets | Typical Meaning | Adjustment |
|---|---|---|---|
| Low | Under 40 | Maintenance or return week | Add slowly |
| Moderate | 40-65 | Most PHAT blocks | Hold steady |
| High | 66-85 | Advanced hypertrophy block | Watch recovery |
| Very high | 86+ | Short overreach only | Plan deload |
| Training Age | Power Sets | Hyper Sets | Recovery Note |
|---|---|---|---|
| Novice | 6-8 | 24-36 | Technique first |
| Early intermediate | 8-10 | 32-48 | Build tolerance |
| Intermediate | 10-14 | 40-60 | Classic PHAT zone |
| Advanced | 12-18 | 50-80 | Needs deloads |
| Formula | Variables | Output | Use |
|---|---|---|---|
| Mifflin-St Jeor | Age, size, sex | BMR | Recovery fuel |
| TDEE | BMR x activity | Calories | Volume support |
| Training max | 1RM x percent | Load | Power sets |
| Fatigue index | Sets, RIR, sleep | Pressure | Deload cue |
💡Tips
A fitness plateau are when an individual isnt experiencing any changes to there muscle size or strength despite the efforts that they is putting in towards gaining these traits. Many individual who experience fitness plateau attempt to fix the issue with either heavy strength program or bodybuilding programs with high volumes of exercises. However, each of these programs have the potential to create imbalance within the muscles.
Strength programs with heavy weights may not necessarily lead to an increase in muscle size, while a bodybuilding routine with high volumes of exercises may lead to a decrease in strength. The PHAT approach combine elements of strength training and hypertrophy training. The PHAT training method use two different physiological methods to train the muscles.
PHAT Training to Break a Fitness Plateau
The first method use a split between power day and hypertrophy days. On power days, an individual perform exercises using heavy weight but performs fewer repetitions then on hypertrophy days. Therefore, the physiological method employed on these days is primarily using heavy weights for a low number of repetition to allow the muscles to experience high levels of tension and force.
