Junbi Undo (preliminary exercises) is the warm up exercises of Goju-Ryu Karate-Do. It consists of a systematic full body series of exercises designed to warm up, strengthen, stretch, condition, co-ordinate and prepare the Karate practitioner's body and mind for the challenges of traditional Karate training.

The Junbi Undo exercises were compiled and developed by Master Chojun Miyagi after years of research and consultation with physicians and other Martial Arts' Sensei. Contained within these exercises are a variety of Karate Kihon (basics) which include stances, strikes, punches, blocks, and kicks. Junbi Undo exercises also develop Qigong, pronounced "Chi Kung" (practice of internal and external universal energy) and Kokyu-Ho (inhale/exhale breathing method).

The preliminary exercises which we do today were systematically developed by Miyagi Chojun Sensei. These preliminary exercises serve not only to limber up the muscles but also serve as a basis for perfectÌng the student's karate techniques. Moreover, these exercises were developed with a great deal of consideration for the needs of the human body. Doing strenuous karate training without the preliminary exercises could cause damage to the muscles. The student will also lack speed and flexibility of movement.

It is important to start with light exercises to warm up the muscles, to limber up all the joints of the body, and to get the blood circulating. After these preliminary exercises, your body is prepared to start hard training. These simple exercises help to improve one's karate techniques and also to arouse one's enthusiasm. These exercises are meant to serve as a lifelong form of mental as well as physical training.

The preliminary exercises begin with a stretching of the joints of the toes, then continue with stretching exercises for the ankles, exercises for the achilles tendon, moving up through the legs, the torso, and upper limbs, finishing up with exercises for the neck.

The latter exercises are to build up physical strength and stamina. Students who find themselves lacking in physical strength and/or stamina should do these exercises repeatedly to help them develop their muscles, physical strength, stamina, and also to help them strengthen their joints. Students should make sure to exhale and inhale correctly while doing each exercise. Doing the exercises with correct breathing helps to improve the blood circulation and strengthens the internal organs, as well as aiding muscles development. Thus, for these reasons, doing the preliminary exercises before starting the formal karate training is important.

Hojo Undo translates as "supplementary exercises".

It is the study and practice of the ancient Kigu (equipment) used in Okinawan Goju-Ryu Karate-Do. Most of the Hojo Undo equipment, with the exception of the Okinawan Makiwara and the Kongo Ken, were brought to Okinawa by Master Kanyro Higaonna upon his return from Foochow, China. Hojo Undo strengthens and toughens the body, develops Qigong (practice of internal and external universal energy) and Kokyu-Ho (inhale/exhale breathing method).

There is a special adult class dedicated to the study of the ancient implements of Hojo Undo. Sensei trains and teaches the following implements: Makiwara (striking post), Chiishi (stone lever weight), Nigiri Game (gripping jars), Ishi Sashi (stone padlocks), Tan (Chinese barbell), Tetsuarei (dumbbells), Kongo Ken (oval metal weight), Sashi Ishi (heavy stone), Tou (bamboo bundle), Tetsuwa (iron rings) and Makiagi Kigu (wrist roller).