if someone does alot of sport but their physical fitness dosent change, is it their diet and what they eat that stops

Question: if someone does alot of sport but their physical fitness dosent change, is it their diet and what they eat that stops them?
- Keywords:
  diet,
  fit,
  fitness,
  nutrition,
  physical,
  sport
Asked by meganmoult to Audra, Fiona, Gavin, Justin on 21 Mar 2012.
- Justin Lawley answered on 21 Mar 2012:
  
  This is a very good question and one that was talked about on the BBC resently. The be idiots you get from training are dependant on a few things. One you need to do the right training, you need to have the right diet and there maybe be some genetic factor that play a role. Unfortunaly, all the above depend on what you want to achive with training. If you have sleek fix training goal let me know and I can try and help

Question: if someone does alot of sport but their physical fitness dosent change, is it their diet and what they eat that stops them?