Dina Asher-Smith believes extra muscle can power her into sprinting elite

The 20-year-old student is eating more and training harder after her Rio 2016 heroics as she seeks an individual medal at the London world championships "I've got to get some muscles on my little chicken wings," says Dina Asher-Smith, erupting into joyous laughter at the thought. "When I stand next to everyone else I'm like yeah, look how tiny I am!"Britain's fastest woman is discussing how she intends to step up to the next level for the London 2017 world championships - which might appear a li...