It depends on what formation you are in, but most of the time there are three forwards on the field, a center a right wing, and a left wing.
That would vary by sport.
it only wastes your time if you dont enjoy the sport you are playing
The longest field of study to obtain a degree in would be to get your doctorate. The total time can be as short as 7.9 years and as long as 18.2 years for physical sciences.
55 hours according to my resources.
The world record for the longest time playing on the Wii is 36 hours and 22 seconds, achieved by Martin Brass in Germany in 2013.
The longest playing time for a British No. 1 record is "Hey Jude" by The Beatles, which runs for 7 minutes and 11 seconds. The song held the top spot for two weeks in 1968.
Some people have TF2 in the thousands (I have 298 HRS)
Get them into sports, and have them practice it. Then if they start to like it they will spend less time playing on the computer and more time practicing for there sport.
Pretend to be French and surrender at first site of conflict
Field hockey becomes a medal sport for women in the Olympics. The Zimbabwe women's field hockey team went undefeated to win the Olympic gold medal.
If they play sports all the time, almost anyone can get fit playing sports. So..... Lots do.