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 Doorway to Strength™ shows how a simple door, doorway, and doorframe can be used to create a multi-gym of exercises using the amazing Iso-Bow® exerciser and the ISOfitness™ exercise system. The Doorway to Strength™ demonstrates how to perform a host of powerful and effective exercises such as the door leg press and shoulder power push, together with many other exercises to work all the major body parts. The Iso-Bow® exerciser is probably the world’s smallest and most powerful portable total-body exerciser. The Iso-Bow® is so compact even that a pair of Iso-Bows® can easily fit into the pocket of an average pair of jeans. However, even just one Iso-Bow® can deliver the perfect level of workout intensity for a beginner or an advanced athlete, and with no adjustment necessary. The ISOfitness™ exercise system aims to deliver more results, in less time, and with less exercise than any other exercise system. Required Extra Equipment: 2 x Iso-Bows® (preferably 4), a solid door wedge/stop.