Wearing jewelleries might affect sports performance because you might hit someone with that jewellery
It's not that it will affect YOUR performance, but it can affect others. For example. Basketball. You gaurd using your hands, if you are wearing, lets say... earings, your defender, could get cut by the back of your earings. Or your earring could fall out in the middle of a game and someone slips on the back. Many possibilities. If my answer isn't in enough detail, ask a refferee or a coach. I play MANY sports, but I am no expert on jewelry. Haha.
wearing proper sports clothes will highly affect your sporting ability... this will help you in lots of different ways aswell as stop you from swearing this will also help you not to conceed sweaty goals on FIFA!
Badly
if you concentrate and don't swap mosquitoes you can do sports faster
Steroid's
Harder to breathe.
It affects your concentration and the performance. If you're very anxious, you can not focus or concentrate on work, school, and sports.
Well if you are drunk then it can affect your co ordination and spatial awareness
pressure, diet, depression
it enhances it, makes you better, spares you from injury
if you concentrate and don't swap mosquitoes you can do sports faster
because if you set a target you will want to reach your goal and do better in your performance