This book has been approved by TWiEA - The World Isometric Exercise Association (www.TWiEA.com). The Doorway to Strength(TM) shows how a simple door, doorway, and doorframe can be used to create a multi-gym of exercises using the amazing Iso-Bow(R) exerciser and the isometric exercise system. NOTE a minimum of two Iso-Bows(R) are recommended. The book contains a comprehensive section on exercise science together with an ideas resource of some of the...