why do people run anti clock wise?

Answer 1

The runners race anticlockwise since before roman times. In all stadia the races always went anticlockwise. Originally stadia were for chariot races and the right hand, which usually keeps the sword, had to be on the outside. There one has the largest freedom of movement.
Therefore in all stadia in the world races have always been anticlockwise, and the tradition has been kept till today.

The inside leg when traversing around a track takes the most punishment. The left leg takes the most strain when you run anti clockwise.
In most people the leading leg is normally the right leg making it harder to run for most people. Should the direction change then it would make it easier for most making the records unbalanced.

(For the same reason you will notice, if you travel in Europe,
that in middle age castles, circling stairs are always built in such a way that the defenders can use the stairs with their right hand, the sword keeping hand, on the *outside*.)

QUOTE: Who determines whether races are run clockwise or anticlockwise?
Like water down the drain, it all depends on what hemisphere you're in. - Eva Mai, Waverley

GOOD LUCK I HOPE THIS HELPS YOU

Answer 2

Being the heart on their left side, heart will have to cover more ground if they run clock wise.