Mr Z
An AI Coach for Fat Loss
Francesco Zen, founder of ZTraining · Last updated June 19, 2026
Why macros come before calories
The same logic behind the metabolic setup principle drives every fat loss plan Mr Z builds. Rather than cutting calories first, the starting move is improving how efficiently your body is using what it's already eating, correcting protein, carbs, and fat at your real intake.
What this means for you specifically
Once digestion and macro balance are genuinely working for you, fat loss tends to start before anything else changes. From there, Mr Z adjusts based on how you're actually responding, not a fixed timeline or a one-size formula.
Related: What is the metabolic setup principle? · How to set up your metabolism for fat loss
Francesco Zen is the founder of ZTraining and ZLIFE, with 18 years of coaching experience working with executives across the UK, US, and UAE. He built Mr Z, an AI coach trained on his methodology to bring the same approach to a wider audience.