How is it to do physical training after Maghrib in a park using the equipment which is provided there?

Answer

The time between Maghrib and Isha' is a time when shayaateen and evil forces preponderate, hence Rasulullah (Sallallahu alayhi wasallam) commanded that even domesticated animals should not be left to wander outside after Maghrib. It is improper and fraught with evil consequences to train outside in a park after Maghrib, especially using the spiritually impure, and perhaps physically impure equipment used by napaak kuffaar.