Mr Z
An AI Coach for Men Over 40
Francesco Zen, founder of ZTraining · Last updated 19 June 2026
What actually changes after 40
Recovery margin shrinks with age. A night of poor sleep or a stretch of low-carb eating that barely registered in your twenties starts showing up directly in performance and body composition by your forties. The fix isn't more training, it's a plan that treats recovery as part of the protocol, not an afterthought.
How Mr Z adjusts for this
Where signs of imbalance show up, bloodwork through a trusted provider is the recommended first step before training adjustments.
Related: Body recomposition over 40 · Why is it harder to lose fat after 40?
He built Mr Z, an AI coach trained on his methodology to bring the same approach to a wider audience.