Thinking about trying out for my school's football team. What do you know about being a linebacker?
the goal of a linebacker is to provide either an extra run protection or extra pass protection based on the defense play being executed by the team at hand. 
Sounds pretty hard. Are they really strong? I am not a strong man.
Linebacker
A linebacker (LB or backer) is a playing position in American football and Canadian football. Linebackers are members of the defensive team, and line up approximately three to five yards (4 m) behind the line of scrimmage, behind the defensive linemen, and therefore "back up the line". Linebackers generally align themselves before the ball is snapped by standing upright in a "two-point stance" (as opposed to the defensive linemen, who put one or two hands on the ground for a "
three-point stance" or "four-point stance" before the ball is snapped).
The goal of the linebacker is to provide either extra run protection or extra pass protection based on the particular defensive play being executed. Another key play of the linebacker position is blitzing. A blitz occurs when a linebacker acts as an extra pass rusher running into any exposed gap. When a blitz is called by the defense, it is mainly to sack or hurry the opposing offense's quarterback.
Linebackers are often regarded