A linesman, or Assistant Referee as one would properly be called if it is a neutral match official, needs various physical fitness skills in order to effectively do the job. These include strength, endurance, flexibility, and fast-twitch reaction. Assistant Referees at the professional level are elite athletes, with athletic skills and training comparable to most players. At the recreational, amateur, and youth levels, an Assistant Referee or club/volunteer linesman does not need to have this level of fitness, though some amount of athletic prowess is recommended and desired for the good of the game.
The Assistant Referee needs to be able to run with sudden bursts of speed, change direction quickly, shuffle side-to-side, and get out of the way of incoming balls and players. An AR might run several miles during the course of the match, depending on the level of play.
when you are a teenager, you go through all the growth spurts etc, so soccer is great for keeping your fitness level up.
beause you need to be able to keep your fitness level up during the period of the game
Probably cross country skiing, swimming and skulling require the highest level of fitness.
no you have to train for a long time to get your game on ... :( yes, some people are bourn with a natural talent on the ball, but years of practice are needed to become a true all-around player in football. Also a lot of professional teams look for fitness as well most people just do not have the fitness to play at a professional level.
Soccer is the most popular sport in the world, people choose soccer for lots of different reasons. Some are because it is competitive, skill demanding, requires a high level of fitness, and it's fun to watch and play.
For that you have to come step by step from distict level to state level, stete level to national level and from national level to international level
Level 20 at least, but 21 is ideal
You can measure your strengths and weaknesses in terms of your fitness level using measurable performance parameters such as the number of games you have won.
You have to be well above the average fitness level, and you have to have muscle but you will also need major conditioning.
http://www.everydayhealth.com/fitness/measuring-personal-fitness-level.aspx is a good website too look at to see how to measure your fitness level. There's information and tips on the website.
Play the game, study the game, start at a lower level, take classes in sports science.
Stamina and energy fitness level