A method of supporting a body part (16), comprising providing a device (100) comprising: a first portion (105) configured to support a body part, wherein, in use, the body part applies a first pressure to the first portion in a first direction; means for detecting the first pressure; and a second portion (115) having means (212) for applying a second pressure to the body part in a second direction substantially perpendicular to the first direction; detecting the first pressure; determining the second pressure based on a user parameter; and applying the second pressure to the body part in the second direction at a pre-determined ratio relative to the first pressure using said means for applying the second pressure.