An 80-year-old woman has an elite VO2 max. She's as healthy as a 60-year-old thanks to a simple routine.

Source: Business Insider

Linda Kelly built elite fitness over the years by staying consistent. Nathaniel Wilder for BI"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.