Is it permissible to delay the Isha prayer until after exercise, thereby missing the congregational prayers for Maghrib and Isha?

Prayer is the pillar of faith, and abandoning congregational prayer due to exercises and matches is not permissible, as these are not legitimate excuses, and they cause a Muslim to miss out on a great reward. One must be keen to perform congregational prayers in the mosque and not be distracted from them by amusement and play.