Establish contact
Begin with a usable foot contact, a comfortable knee bend, and a trunk you can control. A planted foot is useful when the body can organize over it.
LAW 01 / Support
Before the finish, there is a contact. The Base organizes the support that lets the rest of the action happen.
The Base accepts the load and initiates the transfer. The Anchor gives that supported action a direction.
Take it into practice ↓Begin with a usable foot contact, a comfortable knee bend, and a trunk you can control. A planted foot is useful when the body can organize over it.
Watch the supporting leg accept weight before the athlete pushes away. The foot pushes against the floor; the floor exerts a reaction force on the body.
The next contact has a job too. Receive the movement without an uncontrolled collapse, then find a position from which another action is possible.
LEARN IT / REVERSE IT / APPLY IT
THE SCIENTIFIC CONTEXT
Ground reaction is established mechanics: the foot and ground exert forces on each other. The ground is not a source of free energy; muscles do work. Base and Anchor are NST coaching roles used to organize the action.
OpenStax · Newton’s third law ↗PUT THE LESSON IN SEQUENCE