What are the foundational groundwork exercises every horse should know?

The foundational groundwork exercises that virtually all natural horsemanship traditions agree every horse should know address the basic communication framework of yield-to-pressure in the primary directions that training and handling require, and the specific exercises through which these concepts are developed vary somewhat between traditions while targeting the same fundamental understandings. Leading willingly in both directions — following the trainer's direction with a soft lead rope without pulling, dragging, or crowding — is the most basic groundwork foundation and the one that all subsequent work builds on. Yielding the hindquarters — moving the back end away from specific lateral pressure — gives the trainer control of the horse's most powerful and most dangerous end and installs the basic concept of moving away from leg pressure that mounted work requires. Yielding the shoulders — moving the front end away from direction pressure — provides complementary control of the front end and the foundation of lateral steering. Backing from pressure — moving backward away from frontal pressure applied to the chest or through the halter — develops respect for the trainer's forward space and the foundation of the mounted back-up. Basic desensitization — accepting ropes, flags, and other stimuli around the body, legs, and head without reactive flight responses — develops the confidence that makes the horse safe to handle and ride in the variety of environments that domestic horse life requires. Standing tied — remaining calm when physically restricted — is a practical necessity that requires specific training rather than being assumed to develop through other groundwork. Lunging or moving on a circle at requested gaits in both directions is valuable for developing forward energy, balance through circles, and the trainer's ability to direct the horse's movement at a distance. Together these exercises develop the physical suppleness, communication framework, and mental engagement that quality under-saddle work requires.