Doctors and researchers have started talking about healthspan more than life expectancy: the gap between how long you'll live and how long you'll live well. It's called the healthspan-lifespan gap, and according to a 2026 Global Burden of Disease analysis published in The Lancet Public Health, it's been widening for over three decades — not closing.
Global life expectancy climbed from 64.6 years in 1990 to 73.8 years in 2023. Healthy life expectancy climbed too, but slower — from 55.9 to 63.1 years. Do the math, and the average person is now spending nearly 15% of their life in poor health, up from 13.6% in 1990. In the United States, that gap is one of the widest in the world — pushing close to 14 years, meaning a decade-plus that many people spend managing illness, pain, or lost independence before the end of life.
That's the bad news. The useful news is that "healthspan" — the years you spend healthy, capable, and free of major disability — isn't some abstract biomarker you need a lab to measure. It shows up in ordinary, everyday tasks. And those tasks double as a surprisingly honest self-check. Over the next few weeks, I’m going to introduce a battery of tests for you to use to evaluate how your healthspan is faring.
What's interesting about all four of these tests is that none of them require a wearable, a blood panel, or a subscription. They're not new metrics to obsess over — they're checkpoints you already have the data for, sitting quietly in your daily life. That's a big part of why the "healthspan" framing has caught on as fast as it has: it turns a heavy, slightly abstract topic (aging, mortality, decline) into something concrete you can actually act on this week.
And there's a real reason to care about the difference. Most people, if you ask them directly, would rather live to 80 fully independent than live to 95 while managing a decade of chronic illness. Lifespan measures the length of the story. Healthspan measures how many of those chapters you're actually the main character in, rather than a patient managing symptoms.
