Methodology
Best Training Split for a Busy Schedule
Francesco Zen, founder of ZTraining · Last updated June 19, 2026
The exact structure
The exact structure Demanding-oxygen circuits: 10 exercises, 30 seconds on, 10 seconds off, done as one continuous round. Short enough to fit before the day starts, intense enough to actually count.
When more makes sense, but isn't required
For anyone with slightly more room in the week, a 45-minute gym session three times a week is a different, more complete approach, more total volume, more variety. It's not strictly necessary though. The 15-minute circuit genuinely holds its own for someone whose schedule simply won't allow for more.
Related: Fitness for executives with no time · The weekly structure for getting lean in 3 hours a week
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.