Why or what is the connection¬†between worshiping prostrations (Metanias) & fasting (not Holt Great Fast)?¬†
Fasting accompanied by prostrations†is a form of humbling oneself before the Lord.†Prostrations are customarily performed while one is in complete abstinence, not only from certain foods and activities, but completely. When one has not yet eaten, he/she is in a state of hunger and need. This energy turned toward the Lord in prayer and supplications is invigorated by prostrations†with a humble heart to entreat the Lord's mercy.
Read these†words of Moses by which he†beseeches the people to remember God's many mercies:
"Thus I prostrated myself before the Lord; forty days and forty nights I kept prostrating myself, because the Lord had said He would destroy you. Therefore I prayed to the LORD, and said: 'O Lord God, do not destroy Your people and Your inheritance whom You have redeemed through Your greatness, whom You have brought out of Egypt with a mighty hand. Remember Your servants, Abraham, Isaac, and Jacob; do not look on the stubbornness of this people, or on their wickedness or their sin, lest the land from which You brought us should say, 'Because the Lord was not able to bring them to the land which He promised them, and because He hated them, He has brought them out to kill them in the wilderness.' Yet they are Your people and Your inheritance, whom You brought out by Your mighty power and by Your outstretched arm.'" (Deuteronomy 9:25-29).