Sport riddle

1. you pratice this sport alone
2. you are against other people
3. girls and boys parctice that sport
4. it's not a seasonal sport
5. it devellop strenght
6.all the body works when you practice it
7.you've to get a good technic to go further
8.when you race you've to be concentrated
9.the name of this sport has 8 letters
10. the main equipment you need is a swim suit