It is possible for anxiety to affect a student's performance. It could affect their ability to concentrate.
Badly
truly depends how you controll your anxiety
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).
It affects your concentration and the performance. If you're very anxious, you can not focus or concentrate on work, school, and sports.
Psychologists sometimes make a distinction between "state" and "trait" anxiety. Trait anxiety is a more enduring mood of being anxious while circumstances change. State anxiety is a relatively mercurial reaction of being anxious in response to circumstances.
learned
trait anxiety
1970
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.
fasting affect performance