You can't let the highs get too high and you can't let the lows get too low.
Coaches will eventually notice a great attitude, and they respect that.
At least for soccer players, it comes down to a blend of two types of fitness - your base endurance, which comes from longer distance running, and your speed, which comes from sprint-based workouts.
I think that a lot of players and a lot of teams don't think of contact lenses as being a part of that essential gear but it truly is. You want every competitive advantage you can find and obviously having great vision is one of those advantages.
It's always interesting to be playing against some of my best friends and some of my longtime teammates. You get to see them before the game and after the game and it's always nice to catch up but when the whistle blows it's sort of all business on the field.