Does soccer player work on their muscles?

Hello, I want to be a professional soccer player.

Do they develop their muscles by lifting weights and so on?

if so, Do they use machine to develop their leg muscles too?

when you have a lot of muscles, doesn't this make you run slower?

It would be great if you could show me the source where you got your info from.

thank you

Does soccer player work on their muscles?nba gear

soccer players train their muscles specially their legs to become faster and shoot more powerful.

Does soccer player work on their muscles?nba finals 2007 ,nba teams

Yes but strangley it is a very new concept in the footballing world before players were just trained for musclar endurance