She's vividly awaken with an active mind at 101 yo, it's not a thing for everyone. We try to fix the body decadence problem with technology while ancient seems already discovered it. You can see it in her words and her lifestyle; a simple life, a helpful work, a community that makes you feel appreciated for what you do. All the rest doesn't really matter for longevity.

Btw, the woman is addressing the interviewer using "her", which is a common form of respect, for a person probably half her age.