This book has been approved by TWiEA - The World Isometric Exercise Association (www.TWiEA.com). The ISO90(TM) Course is a comprehensive science-based step-by-step 90-day/12-week body shaping, bodybuilding, and functional strength-building course based on the isometric exercise system. The ISO90(TM) course is ideal both for beginners and advanced trainers because your natural Adaptive Response(TM) mechanism means that whatever intensity you apply...