Healthspan means the years we live fully healthy, not just how long we live....

https://www.medicaldaily.com/marc-kielburger-healthspan-vs-lifespan-why-purpose-belongs-longevity-conversation-478751

Healthspan means the years we live fully healthy, not just how long we live. While people in the US can expect to live about 12.4 years longer, many of those extra years come with illness or disability