Note that in these drills the pro goalkeepers don’t just have word-class shots pelted at them. 3. In-Goal Drills. Pregame, it’s important to get a feel of your surroundings: the stickiness of the mud around the goal mouth, bobbles around the box, the wind conditions, the brightness of the sunlight, how the ball slides and kicks-up off the surface, and so on.
https://topgoalkeeping.com/warmup-routines-goalkeepers-preparation