Ken Jones has run the London Marathon every year since its inception. At 85-years-old, he is the oldest competitor in this year's race.

Only ten other runners competing on Sunday have run all 39 races and this year's marathon will be Ken's penultimate event.

The octogenarian runner has some sage wisdom on how to stay healthy no matter your age.

Watch the video to see Ken's tips and how he has stayed in shape all these years.