For most people—regardless of age—so much as attempting a triathlon is a daunting prospect, let alone actually completing one. Even more impressive would be finishing fast enough to officially rank.

80-year-old Natalie Grabow is the oldest woman to complete an Ironman triathlon. NBC News' Tom Llamas sits down with Grabow to talk about her triathlon experience and her love of movement at any age.

Once, we were told to hang up our trainers and rest in old age. But today’s over-60s are crushing such stereotypes and proving it’s never too late to get fit. Sport England says the biggest rise in ...