Running clubs are now the place to be seen, socialise – and even date, but as a third of entries for next year’s marathon are from those between 18-29 years old, what is really behind this surge? Lydia Spencer-Elliott takes a closer look Sign up to our free Living Well email for advice on living a happier, healthier and longer life Live your life healthier and happier with our free weekly Living Well newsletter Live your life healthier and happier with our free weekly Living Well newsletter