Mr Z

An AI Coach for Muscle Gain

Francesco Zen, founder of ZTraining · Last updated June 19, 2026

Why recomposition beats a straight bulk

Nutritional setup is based on body fat, and recomposition is consistently the most effective metabolic state to build from. Rather than bulking broadly and cutting later, the approach works in a tighter, repeating cycle.

Get leaner first

Start from a body fat position that supports efficient muscle building, not the heaviest possible starting point.

Carbs go up

Once leaner, carbohydrate intake increases to fuel performance and support new muscle.

Repeat the cycle

Once the client gets leaner again, the process repeats, performance climbing, the scale climbing, body fat staying stable or continuing to drop.

Why this is more effective long term

It's more technical than a straightforward bulk and cut, but it consistently performs better over time: muscle and strength go up while body composition either holds steady or keeps improving, instead of being undone by a separate fat-loss phase afterward.

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.