WASHINGTON (AP) — Most young adults haven't given much thought to their own needs as they get older, but a significant number are already providing long-term care for older loved ones, according to a new poll by the Associated Press-NORC Center for Public Affairs Research.

And while those who have caregiving experience put in fewer hours than their older counterparts, they're more likely to feel stressed out by the experience.

According to the poll, a third of American adults under age 40 have already provided care for an older relative or friend, and another third expect to be called upon to...