training will make a keeper better and keep 'em sharper. Good hands can always be made better and relexes quicker. Addtionally, the athletic ability to cover the goal or sprint to a free ball also needs constant work.
It is true, however, that the worlds greatest save is made worthless if in the same game the keeper lets a soft one through his hands.
I believe keepers should constantly be focused on the game. If there are long stretches where there's no action, the keeper may stay loose by bouncing around on his feet or so. Additionally, keeping in constant communication with the field players will keep them in the game.
Some keepers even like to warm up again at half time and have some shots or face some crosses.
In the end, focus is hard to get, but if a keeper lets in a bad goal, it is vital that they put it behind them. If they worry about what went wrong, they will surely let another one in during the meantime. Forget it and play, then, look at the errors after the game.
Nerves of steel and ice in the veins... it is very difficult to make a goal keeper unflappable, but keep working at it. |