Here I interview a personal trainer to pick his brain about the wonders of staying in shape and training. So you'll pick up some great advice as well as deepen your knowledge of how to use 'hit the ground running' and 'fall behind'! You're also going to learn loads of great words and expressions and practise your listening skills. Enjoy! Ed's Instagram handle: ed_knowles. More info: http://keyteenglish.com/es/hit-the-ground-running-and-fall-behind/