More arrows to the knee
it depends on which sport you are playing.
One can easily faint
Cohesion in relation to sport is what keeps a group or team together.
it affects your mind and ability to think. Also your lungs. it is caused be smoking
No stress does not have any positive effect. It always affects the person negatively. It causes the person to behave foul manner.
Your question is too general - affects stress to what?
Examination affects the learners a lot. If somebody had a bad exam it causes the person to be under stress. That further decreases the performance of the person in future examinations.
Pollution can affect ones lungs, and that can cause illnesses. Illnesses can result in poor performances due to lack of air
"seasonal". And it doesnt effect sport performance.
depending on your stress levels, your performance may vary to a point where you take all frustration out on your opponents. now this is ok as long their is no physical danger of injuring your opponent(s). sport has been scientifically proven to reduce stress levels in people so it can be a good idea to play sport when stressed :)
Because, if anyone does sport she/he distribute the happiness hormone serotonin. And that combats stress
The statement "Moderate levels of stress can enhance performance, but high levels of stress can impair performance" is true. This is known as the Yerkes-Dodson law, which suggests that there is an optimal level of stress that can lead to peak performance before performance begins to decline with increasing stress levels.