Originally posted by Contra_Mundum
Kneeling for communion was largely rejected by Reformed and Presbyterian churches as left-over from Roman adoration. We are better off leaving it entirely.
Kneeling in prayer is a legitimate method of employing our body in worship, even public worship. Witsius has a full chapter on "gestures in prayer" in his treatise The Lord's Prayer (pp64-102). He actually takes the position that to pray seated (as is common today) is well-nigh universally opposed as inappropriate (pp. 83-84).