In the pole vault, what is the 'plant' phase?

In the pole vault, the plant phase refers to the moment the pole is placed into the plant box (also called the planting box or vaulting box). The plant box is a trapezoidal metal box embedded in the ground at the base of the uprights. During the plant, the vaulter drives the far end of the pole into this box, which acts as a fulcrum. The energy from the approach run is transferred through the pole, bending it and converting the athlete's horizontal speed into vertical lift.

The plant phase is technically demanding because the vaulter must coordinate the forward drive of the pole tip into the box with the final stride and takeoff. Poor timing or angle during the plant can result in a failed vault or even injury.

The other options are incorrect:

• Planting hands on the pole before the jump describes the grip, which is established during the approach run, not a specific phase called "the plant."
• Planting the head on the mat after the jump is not a recognised phase. The landing involves the back and shoulders contacting the mat, and it is simply called the landing.
• Planting feet in a takeoff box to stop forward motion misrepresents the technique. The athlete takes off from the ground near the box, not by planting feet inside it.