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

https://highstylife.com/183-who-member-states-study-what-did-researchers-compare-exactly/

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