British athletes have been training with what's called the MotivePro Suit for the Summer Olympics 2012. Its an awkward suit that tracks their movements and provides vibrating feedback when they've successfully got a routine right.
Developed by Professor Gregory Sporton as a way to improve his posture while training as a ballerina, the suit is able to measure the position of the performer's body in 3D space and when they've properly extended an arm, or raised a leg high enough, the small motors in the suit will vibrate to let the wearer know that they've nailed a move.
The suit is now primarily being used by the British rhythmic gymnasts, but it could also benefit other sports too for example tennis players perfecting their stroke and swing, or any other motion that would give athletes an edge over the other. [The Daily Mail via Ubergizmo]