how to play midfield in soccer

Soccer, stamina, midfield?

how do i increase my stamina in soccer?
im 15 male play for my high school soccer team
i play midfield which means i have to run more
i withlast 90mins but i want more stamina just incase
anybody know whats a good way to get stamina ??

run, swim, bike and practice a lot

Youth Soccer Drills & Skills : How to Play Mid-Field: Soccer Positions