People used to built their muscle for Wrestling, Boxing, Kabadi etc. But these muscle useless before Satan and His tricks. And to defeat Him you must need a Spiritual Muscles. There is only exercise to built a Spiritual Muscles i.e. Prayer. When You did this exercise (Prayer) daily, you got the Muscle of Holiness, Muscle of Power, Muscle of Wisdom, Muscle of Authority, Muscle of God's presence by which you can easily destroy the work of Satan.