Drawing on contemporary neuroscience, this book shows leaders how they can literally train their mind to become more resilient and have a more sustainable impact. This is a research-backed and practical guide for how to grow inner capabilities enabling sustainable leadership in this time. It is built around five areas that many leaders will recognize as being challenging on a personal level, such as how to stay calm under pressure, navigate in uncertainty or collaborate skilfully with people with diverse points of views. While many leadership books describe the importance of such traits, few show how to actually cultivate them. Grounded in multiple fields of research, this book offers a practical training manual for the mind. With more than 40 reflections and exercises, it offers a guided tour to an ‘inner gym’, showing readers how to cultivate these capabilities. Leaders who have realized that it takes more than IQ and theoretical knowledge to create sustainable impact and are looking for ways to deepen their leadership capacity and authenticity will find them in this practical training manual for the mind.