I was told that shuckeling (sp?) is an indication of the love-fear relationship that we have with God. You move forward showing that you want to be close to God and then backward out of fear of his awesomeness.
But then I was also told that for the amidah you should stand perfectly still.
Not sure how to resolve these two. Furthermore I find shuckeling to be distracting, but swaying side to side seems to help me concentrate.
What is the optimal thing to do?