
A lot of physical training experts agree that soccer is possibly the
most physically demanding of all the sports. There are many reasons for
this, including playing on a very large field with no rest periods and
a game that can last a very long time. Players sometimes cover as much
as ten miles in a match, consisting of 24% walking, 36% jogging, 20%
coursing, 11% sprinting, 7% moving backwards, and 2% moving while in
possession of the ball. The game is played at such an intense level
that the average player's heart rate is 90% of maximum.