Anxiety can definitely effect your sports performance. Anxiety is related to depression, it involves worrying about virtually everything (depending on the severity). Any thoughts that are not focused on the game at hand can effect your performance negatively.
People have performance anxiety, because they are afraid that they are going to fail when in a situation of pressure. It takes away their confidence, and messes them up in whatever sport they are competing in.
you can get confused or have an anxiety attack in the middle of game if there is a lot of stress.
It affects your concentration and the performance. If you're very anxious, you can not focus or concentrate on work, school, and sports.
well anxiety effects your over all performance. You would be a ball hog as it is called, but you would not be a good team mate
It makes them think so much about the anxiety that they can think about the sport the are playing (I'm only 8).
Stress usually has a negative effect on sports performance. When the mind is disturbed, it becomes difficult for one to coordinate physical activities.
One needs to be more specific. Which aspect of sports performance? Which sports.