K'ang Jo Fu
Cahn popularized a self-defense technique called k'ang jo fu (also known as kang jo fu or "the kang") in his 1974 book K'ang Jo Fu: Self Defense for Gentle People.
K'ang jo fu can loosely be translated as "the way of health". Cahn learned the martial art from a visiting Chinese professor at UC Berkeley, Ch'eng Hsue' Yi in 1943. Ch'eng returned to China and Rolf continued to study and teach kang. One of his students, described as a young boy in the introduction of Cahn's 1974 book, Robert Rawlings, taught kang jo fu to martial artist and acupuncturist Charles Peri, who continues to teach kang jo fu in Novato, California. Although kang jo fu is based on a 95 movement form, it does not attach its movements to any ideology or scenario and can be described as pure form. It places a practitioner inside of everyone elses time and all directions (like bagua and xinyi ).
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