| Hello Anglefire.
The Bible shows that there was no set form of posture for prayer. All the attitudes assumed were highly respectful. Standing was a common posture. Jesus spoke of this position for prayer. Mr 11:25 Immediately after being baptized, Jesus was evidently standing and praying when the heaven was opened up and the holy spirit in bodily shape like a dove came down upon him, and God’s own voice was heard from the heavens.Lu 3:21, 22.
Kneeling was a common attitude of prayer. Jesus himself knelt in the garden of Gethsemane. Lu 22:41 In representing the nation of Israel in prayer Solomon knelt at the inauguration of the temple. 1Ki 8:54 While many of the instances in the Bible use the word “knees” in the plural, it may be that at times a person would kneel upon one knee, as is done sometimes by modern Orientals. Ac 9:40; 20:36; 21:5; Eph 3:14.
Jesus prayed publicly, in sincerity, as did Paul and others. He also recommended private prayer. Mt 6:5, 6 But Jesus condemned ostentatiousness in making long prayers for a pretense, a practice into which some of the scribes had fallen. Mr 12:40; Lu 20:47
Christians adopted many of the customs and practices of the Jewish synagogue—ones that God did not disapprove—and the same attitudes and postures of prayer are mentioned in the Christian Greek Scriptures. Nowhere do they give support to a facial or bodily attitude of assumed piety and sanctimoniousness. They do not make any given posture, such as placing the palms together or clasping the hands when offering prayer, essential. In fact, prayers can be made silently and completely without outward manifestation, when the individual is carrying on an assigned duty or is faced with an emergency. Christians are told to carry on prayer “with every form of prayer and supplication.” Eph 6:18.
Take care,
Hope12 | 
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