Healthspan means the years you live in good health, not just the total years...

https://www.rankbookmarkings.win/lifespan-is-how-long-we-live-but-healthspan-is-how-long-we-stay-healthy-and

Healthspan means the years you live in good health, not just the total years you’re alive. While the U.S. sees a 12.4-year gap between lifespan and healthspan, meaning many years with illness, purpose and connection can help close that gap