Objectively model bone structure limits, muscle insertion tendon ratios, myostatin responses, and realistic drug-free ceiling vs supraphysiological PED curves.
Bone Girth & Clavicles: Thicker wrists/ankles support substantially larger cross-sectional muscle area. Clavicle width determines the shoulder-to-waist V-taper.
Tendon Lengths: High insertions leave aesthetic gaps and less total muscle volume potential, whereas low insertions create continuous thick muscle bellies.
Hypertrophic Proximity: Training 0–3 Reps in Reserve (RIR) with progressive volume recruits maximum high-threshold motor units regardless of genetic tier.
Nutritional Partitioning: Caloric surpluses optimized with 1.6–2.2g/kg protein maximize fractional synthetic rates without excessive adipose accumulation.
Natural lifters encounter sharp diminishing returns after year 3 (under 1–2 kg gain/year). Social media physiques frequently present FFMI > 26 and full 3D delts achievable solely with exogenous androgens.