A longevity road map for happier, more fulfilling lives

SOME years ago, when I qualified for a senior citizen discount at Watson's, I had mixed feelings. Hurrah for the discount, but attaining a senior status - at Watson's, the threshold is 50 - was something of a downer.

Yet my litmus test of age today is my almost-daily practice of ashtanga yoga, a particularly challenging series. Physically I am stronger now than I ever was in my 20s or 30s, let alone the teenage years. Am I old or young-old?

A new book by bestselling authors and academics Andrew Scott and Lynda Gratton makes the point that longevity need not, in fact should not, be equated with ageing. There is a widening gap between biological and chronological age that society and workplaces fail to recognise or accommodate.