Non-Japanese who have not grown up sitting in this posture may, however, have difficulty assuming it at all. Those unfamiliar with seiza will likely find that maintaining it for more than a minute or two tends to lead to paresthesia, whereby the compression of the nerves causes a loss of their blood flow, with the accompanying "pins and needles" feeling, followed by painful burning sensations, and then eventually complete numbness in the legs. However, the physical discomfort lessens with experience as the circulation of the blood improves.