Poyasnyzemnoy poklon and 'Naklon' Serbian Bowing, are different kinds of bows used in an Eastern Orthodox worship service. The different kinds of bows one could encounter at an Eastern Orthodox service are shown in the adjacent picture. Only types 2and 5 have their own independent meaning and rules of usage; the other types are either "lightened" or "weighted" versions of these three "basic" versions. Strict rules exist as to which type of a bow should be used at any particular time. The rules are very complicated, and are not always carried out in most parishes. Old Believers are generally much more punctilious about bows in comparison with the official Orthodoxy.
The first type is a 'head-only bow'. This type of bow does not have its own assigned usage, but can be used only instead of a 'belt-low bow' in some situations, such as when one cannot make a lower bow because of too many people in the church or for back problems. People also should keep standing in this position during reading of Gospels and some other important periods of the service.
'Belt-low bow' can also be called an 'ordinary bow', since it is the most widespread type of bow. Most bows during the Eastern Orthodox service are of this kind. However, sometimes, for example, during the Lent, the bows became lower and 'earth-low bows' should be used instead.
'Belt-low bow with touching earth by a hand'. This type of a bow could be treated in two ways: sometimes it's only the 'very thoroughly done type 2 bow'. Sometimes, on the other hand, it's a 'lightened' version of an 'earth-low bow'. For example, when Popovtsy Old Believers ask their priests for a blessing, they should, theoretically, perform a 'earth-low bow'. However, since one could ask a priest for a blessing during an occasional meeting on a street, where it is rather uncomfortable to make a full 'earth-low bow', usually one only touches the earth with one's right hand.
Metania is also a 'lightened' version of a 'earth-low bow' that is used in Orthodox services sometimes.
Zemnoy poklon is a special type of bow which is especially important for Old Believers. It is also performed by the priest and many of the congregation during the epiclesis.
Kneeling, standing on one's knees, is rarely prescribed or practiced. An exception is that the ordinand "bending both knees places his palms in the form of a Cross, and lays his forehead between them on the Holy Table" when a bishop is consecrated or a priest is ordained. In the 20th century in some western countries, some Eastern Orthodox churches have begun to use pews and kneelers and so have begun kneeling in some parts of the service. Orthodox tradition specifies that the faithful are to stand rather than kneel in prayer from Pascha until Pentecost, and on all Sundays throughout the year, in honour of the Resurrection. That dates from the time when kneeling was more prevalent than it is today. There is some variation in interpretation, with some traditions, notably in the Greek church, extending this prohibition on kneeling to also preclude prostrations. Within the Slavic churches, there is regional variation in practice, with some places avoiding prostrations on Sundays and others making the usual prostrations regardless of the day of the week. The Russian Old Rite, which reflects the praxis of the Russian church prior to the 17th-century reforms, which brought it in line with Greek practice as it stood at the time, itself the result of revision over the centuries, explicitly requires prostrations to be made at certain points during the services regardless of whether it is a Sunday, including at the end of Shine, Shine throughout the paschal season. That would seem to suggest that the canons forbidding kneeling on Sundays were not anciently understood to also prohibit prostrations. Indeed, the rubrics of the services require the faithful to prostrate before the Cross on the Third Sunday of Great Lent and also on the Feast of the Exaltation of the Cross, even if it falls on a Sunday.
