Given the geometry of the training field as shown below:
The length of the training track is evaluated by summing the lengths of the rectangle ABED and the length (circumference) of the semi-circles AFE and ACD.

where

The circumferences of the semi-circles AFE and ACD are similar and are evaluated as

thus,

The total length of the training field is thus evaluated as

Hence, the length of the training track running around the field is 587.64 m.