This book has been approved by TWiEA - The World Isometric Exercise Association (www.TWiEA.com). Currently, the entire range of books written by Brian Sterling-Vete and Helen Renee Wuorio about the Bullworker, isometrics, and other related forms of exercise are the only books to have received this approval together with TWiEA's 5-Star Rating. The Bullworker 90(TM) Course is the essential 90-day/12-week course for all Bullworker(R) users, and it's the companion book to The Bullworker Bible. Both books are approved by the makers of The Bullworker(R). The Bullworker 90(TM) is a 400+ page, science-based, user-friendly, step-by-step instruction course designed to increase strength, fitness, grow muscle, body-build, and increase power over a 90-day/12-week period. New exercises are added almost every week, with complete routine changes every two weeks. Each week has a detailed note section, together with suggestions about exercise days, and rest times etc. This means that you know exactly what to do, and when to do it. The course includes step-by-step instruction, progressively increasing intensity over 90-days, isotonic/Isometric exercise combinations, and multi-angle isometric exercise combinations. The Bullworker 90(TM) Course can be used with the Bullworker(R) Classic, the Steel Bow(R), the Bullworker X5, the Bully Extreme, the ISO 7x, and the Bullworker X7. The Bullworker 90(TM) Course also contains alternative/extra exercises using the Iso-Bow(R) and the Bow Extension(R) to increase the range and effectiveness of The Bullworker(R). Required Equipment: A Bullworker(R) Classic, or a similar device. Recommended Equipment: Steel Bow(R), Bow Extension(R) kit, 2 x Iso-Bows(R).