Executive recomposition
Fitness for Executives With No Time
Francesco Zen, founder of ZTraining · Last updated 19 June 2026
Why 15 minutes can be enough
Real results don't require a long session, they require the right structure. A focused 15-minute HIIT block, done consistently, can genuinely move the needle when the calendar simply doesn't allow for more.
Why timing matters as much as duration
Training before breakfast, on an empty stomach, simplifies how the body adapts and gives an energising start to the day while speeding up metabolism. A shower afterward and the day continues as normal. The same approach can work in the evening instead, if mornings genuinely don't fit.
Related: Best training split for a busy schedule · The weekly structure for getting lean in 3 hours a week
He built Mr Z, an AI coach trained on his methodology to bring the same approach to a wider audience.