Visual references and comparison charts for FFMI, genetic potential, frame size, and natural bodybuilding limits.
These research-backed charts and tables help you understand where you stand in terms of natural muscle-building potential, body composition, and realistic physique goals. Each chart is based on scientific data from peer-reviewed studies and decades of natural bodybuilding research.
Use these visual references to set realistic expectations, track your progress against natural standards, and determine if your training and nutrition are optimized for your genetic capacity.
See how your maximum natural muscle-building potential changes with age, from peak potential in your 20s to adjusted expectations in your 40s and beyond.
Compare your current FFMI against population percentiles for natural lifters. See where you rank from beginner to elite natural bodybuilder.
Determine your genetic frame size category (small, medium, large) based on wrist and ankle measurements. Frame size directly impacts maximum natural muscle potential.
Visual breakdown of FFMI ranges from untrained to elite natural genetic potential. Understand the realistic ceiling for drug-free muscle building.
Realistic muscle gain expectations by training experience level. See how much muscle you can expect to build per month/year as a natural lifter.
Maximum natural bodyweight and lean mass predictions based on your height. Uses Martin Berkhan and Casey Butt formulas for accurate estimates.
Assess your bone structure symmetry and proportionality. The wrist-to-ankle ratio reveals genetic frame balance and muscle-building capacity.
Use our science-based calculator to determine your maximum natural FFMI and muscle-building ceiling.
Calculate Your FFMI →