Is fitness a concern in the English National Team?

I believe that we train ourselves really well, but the footballers eat such crap compared to other nations and don't really have any good strategic planning.Is fitness a concern in the English National Team?We need a Winter Break, English Players are fit - but they are so bad at passing, that they end up chasing the other team around the pitch for 90 minutes, losing their Energy, i great example of this was in the last 20 minutes vs Switzerland