On other occasions you may hold one hand up as a victory salute to the Lord. There is no obligation for anyone to lift their hands in worship. Lifting your hands does not make you more or less spiritual than those who don't lift their hands. For me and many other people, we have found that expressive worship is powerful and satisfying. Don't allow yourself to get into a rut.
New ruts are just as deadly as old ruts.
Above all, don't criticize people who worship in a manner different from you. I think that it is important that we Give Jesus the final say on worship. A time is coming and has now come when the true worshipers will worship the Father in spirit and truth, for they are the kind of worshipers the Father seeks.