Throw Your Body into It!
As we gather in God’s assembly Sunday by Sunday, our bodies are very much a part of our worship. We are to reign in our bodies and should throw them into our praying and worship of God Almighty. Therefore, it is very fitting and proper that we kneel in confession of sin, stand while singing our hymns, sit straight & respectful or lean over with intense attention as we pray (or kneel, or stand, etc), as well as stand out of respect to the reading of God’s Word.
Therefore, don’t look on the bodily movements of worship as meaningless religious gymnastics. Don't give in to the slouchy, slothful, flippancy of modern day hipness and irreverence. Instead, see the bodily actions of worship for what they really are: worshiping God with body and soul, which is the way God likes worship. “I desire therefore that the men pray everywhere, lifting up holy hands, without wrath & doubting.”