Lifespan is how long you live, while healthspan is the years you stay healthy...

https://bizzmarkblog.com/purpose-ideas-after-retirement-that-do-not-involve-starting-a-business/

Lifespan is how long you live, while healthspan is the years you stay healthy and active. The U.S. faces a 12.4-year gap between lifespan and healthspan, meaning many years with illness