Deterministic Physics: Uses the 7,700 kcal/kg rule for mass changes based on thermodynamic principles.
Calorie-Weighted Partitioning: Fat/muscle ratio depends on exercise mix and calorie balance:
- Deficit (<-100 kcal): Resistance 90% fat / 10% muscle loss | Cardio 65% fat / 35% muscle loss
- Maintenance (±100 kcal): Resistance enables recomp (lose fat, gain muscle) | Cardio slight fat/muscle loss
- Surplus (>+100 kcal): Resistance 50% muscle / 50% fat gain | Cardio 20% muscle / 80% fat gain
- Protein: Optimal (≥1.6g/kg): ±5% | Adequate (1.2-1.6g/kg): 0% | Low (<1.2g/kg): ∓5%
- Alcohol: Regular consumption (>7 drinks/week): ∓7% (worse in all scenarios)
Real-time Updates: Charts update instantly (<16ms) as you adjust your inputs.