Deep neck flexors in forward lean (extension) (Cervical retraction/deep neck flexors strengthening, into extension, sitting hands on table)

Sit up straight in front of a table.
Place your forearms on the table leaning your body forwards.
Ensure your back remains straight with your weight through your seat bones.
From a neutral position with your head, pull your head backwards so that your chin tucks in.
Keeping this position, look up towards the ceiling until your head is around neutral.
Hold this position.