The Fighter's Guide To Hard-Core Heavy Bag Training
Wim Demeerehas practiced a variety of martial arts for over 20 years, studying mainly Chinese systems and several full-contact fighting styles such as sanshou and Muay Thai.  He won four national titles and a bronze medal at the 1995 World Wushi Championships.  He is the former national coach of the Belgian Wushu fighting team, and still trains fighters for international competition.  You may find out more athis website.Loren Christensen'sservice as a military policeman in Saigon during the Vietnam War, his 25 years as a street cop in Portland, OR, and his training in the martial arts have given him real-world perspective on truly functional self-defense techniques (and earned him a spot of the list of "20 Toughest Streetfighters")  Learn more fromhis website.