Other Positions
For example, Jesus spoke a lengthy prayer, loud enough for all his disciples to hear, when he walked to the garden of Gethsemane to await his arrest (John 17). According to Tertullian (c. 155 - c. 240 A.D.), early Christians did not have a single best prayer position they used. They, instead, favored several positions such as standing, sometimes with their heads bowed, with their arms extended at their sides (like the shape of a cross) or with them raised toward heaven.
Christians were also inclined to kneel or prostrate themselves when making their petitions to God. The striking of the chest while in prayer to the Eternal was also sometimes practiced.
After arriving at the garden, located at the foot of the Mount of Olives, the Lord seems to have first offered a prayer while kneeling (Luke 22:41). He soon, however, switched to a position of kneeling and bowing his head such that it touched the ground (Matthew 26:39) while he sought the Father's will regarding what awaited him. Other individuals in Scripture are also recorded as crying out to God while kneeling and placing their face on the ground (Numbers 16:22, Joshua 5:15, 1Chronicles 21:16).
Reaching to Heaven
King Solomon prayed while on his knees with his arms outstretched toward God.
Now it came to pass as Solomon finished praying all this prayer and petition to the Lord, he rose from before the altar of the Lord, from kneeling on his knees with his hands spread up to heaven. (1Kings 8:54, HBFV throughout).
He was not the only one to lift his arms in prayer. Others also did so, either while kneeling or standing, and sometimes also had them spread out during prayer (Psalm 28:2, 1Kings 8:54, Lamentations 2:19, Isaiah 1:15, Ezra 9:5 - 6, 1Timothy 2:8, etc.).
Standing
Prayer was also, many times, given while standing up (1Samuel 1:26, Judges 16:25 - 28). Abraham, while talking directly with Jesus Christ regarding the fate of Sodom and Gomorrah, stood (Genesis 18:22 - 33). This position was especially common among Jews in New Testament times (see Matthew 6:5, Mark 11:25, Luke 18:11, 13, etc.). Even in modern times, Jews frequently stand while they pray and bemoan the destruction of Jerusalem's temple at the place known as the Wailing Wall.
Sitting Down
The Bible even records one instance where King David sat down in prayer to the Lord. He did so in order to praise Him regarding the promise to make his descendants into a perpetual ruling dynasty over Israel.
And David the king came and sat before the Lord, and said, 'Who am I, O, Lord God, and what is my house that You have brought me this far? . . ." (1Chronicles 17:16).
Jonah, after he was swallowed by a great fish, likely prayed when he was in some sort of fetal position in the beast's belly (Jonah 2:1).
Is There an Ideal?
What constitutes an ideal or best prayer that can be offered to God? As this article has shown, although it is always acceptable to kneel, many other physical positions can be utilized. The Bible does list, however, many definitive characteristics of the "ideal" petition made to our heavenly Father. For example, it should be simple (Matthew 6:7), made in humility (2Chronicles 7:14, Psalm 10:17, Luke 18:13 - 14) and offered in sincerity (Psalm 17:1, 145:18).
Additionally, in prayer, we should be persistent (Luke 18:8 - 9, 18:1 - 7), bold (Hebrews 4:16) and have faith that the Eternal not only hears us but also rewards those who diligently seek him (Hebrews 11:6). We should make our petitions known in accordance to God's will (1John 5:14) and should be living a life that obeys his commandments (1John 3:22).
Our hearts, when we pray, should also be ready and willing to forgive every person of every sin they committed against us (Matthew 6:12 - 15). Ultimately, the best prayer position is anything you find comfortable and relaxing.