- participant must hold a backbend (bridge) supported by one arm only

- timing starts once the participant is in position with one hand on the floor and the other arm clear of it

- timing stops when the free hand, a knee, the head, the hips, or any other part of the body touches the floor, or when a second hand support is taken

- feet may remain in contact with the floor; no props, walls, or spotters may bear any of the participant's weight

- the participant must remain in full view for the whole attempt

- video evidence must show entry into the position, the full hold, and the exit, continuously