Introduction
Most men in their 50s know they should be looking after themselves. They train, they eat reasonably well, they track their steps. And most of them are blind to the thing that will actually limit how well they age. Not disease. Not fitness. Their weak link.
Professor Scott Fulton has spent years studying what actually predicts functional health span for men — the ability to do what you want to do, for as long as possible, with independence intact. His conclusion challenges almost everything the fitness industry tells you. Being fit is not the same as being functionally resilient. And most men find out the difference far too late.
Scott is a research engineer turned aging specialist, a former triathlete, and the author of two books on health span. His latest, Function, went straight to number one. It is built entirely around self-assessments any man can do today, in his kitchen, at his front door, or on his morning walk, to find out exactly where his blind spots are before they find him.
In this conversation with Pod O’Sullivan, Scott covers the science in plain language and without a single supplement in sight.
What You'll Hear
- Why walking speed predicts your health span better than any fitness metric — and what 0.1 metres per second actually means for your next decade
- The five functional domains that determine how well you age, and why your strongest one is irrelevant
- Why a fit man can still fall off a ladder — and what that tells you about reaction time and neuromotor speed
- The self-assessments Scott recommends for every man over 45, starting with the one you can do tonight while brushing your teeth
- What retirement does to cognitive health, and what Scott watched happen to a former automotive plant manager within 18 months of stopping work
- The genetics question: why your father’s health history accounts for only about 15% of your outcome — and what the other 85% depends on
- Community, male isolation, and why building social connection needs to start in your 40s, not after you leave the office
- What Scott told himself about capacity when he started training for an Ironman at 43 with no athletic background
If you think fitness is enough, this episode will shift something. If you’ve already had a moment where your body surprised you — the ladder you hesitated on, the floor you couldn’t get up from as cleanly as you expected — this is the conversation that explains why, and what to do about it.
Guest info
Scott Fulton
Professor Scott Fulton is a research engineer who spent his career solving complex problems for global organisations before turning his attention to the most consequential system he could find: the aging human body.
His two books, WellSpan and Function, draw on longitudinal datasets covering more than 700,000 participants and 10 million person-years of data to identify what actually determines how well men age. His focus is functional health span — not disease management, but the ability to keep doing what matters for as long as possible. Function debuted at number one.
Scott served as Chair of the National Aging in Place Council in the United States and has worked extensively with older adults and their families. He is a former Ironman triathlete who began competing at 47 with no prior athletic background. He is based in Canada and consults internationally.
