This book has been approved by TWiEA - The World Isometric Exercise Association (www.TWiEA.com). In 2020, the world changed forever due to a deadly new virus. We are not even allowed to name it or we will not be allowed to publish this book, so I will call it the GGV or Great Global Virus. Millions of people were immediately forced to maintain a safe social distance and abandon all places where people congregate in large numbers to help stem the spread of the GGV. This meant that gyms, which are typically some of the unhealthiest of places when it comes to virus and disease transmissions, were suddenly forced to close. Suddenly, millions of people all over the world who loved to exercise regularly were forced to learn how to exercise at home, sometimes in extremely confined spaces. Science had also shown that people who trained for long periods and especially endurance athletes were far more susceptible to illness and especially upper respiratory tract infections. The most important area which the GGV initially strikes. Even though for most people, overtraining to this degree is unlikely, an exercise system that is scientifically proven to work while minimally impacting the immune system is wise. Isometric exercise is the answer. It is as intense as you want it to be, so it is suitable for beginners and advanced athletes. More importantly, it is also brief, and therefore dramatically reduces the risk of weakening the immune system due to over-exercising. The Zero-Footprint Lockdown Workout(TM) delivers the 10 essential total-body exercises that can be performed in the smallest of spaces. If you can stand and sit, then you can perform a powerful workout routine in as little as 70 seconds a day! NOTE: The authors, Brian Sterling-Vete and Helen Renée Wuorio are exercise specialists who have worked closely with the NHS Innovation Team at the Greater Manchester Mental Health NHS Foundation Trust on two major isometric exercise trials during 2020. This was an outstanding success and they are now moving into a third much bigger trial before looking towards an expansion into more sectors of the NHS across the UK. TWiEA will be involved to conduct isometric exercise instructor training programmes for key NHS staff.