heart-health

"I have always seen myself as a very ordinary person with no real athletic ability," said Linda Kelly.

Still, at 80, she has completed multiple half-marathons and routinely hikes, bikes, and runs around her part-time home in Anchorage, Alaska.

Bryan Johnson explains why a low resting heart rate is key to longevity.

When Deb Stern steps up to the barbell for a heavy back squat, all distractions fall away.