Practical approaches to keeping testosterone in balance make up this chapter. It begins with exercise, citing research on aerobic activity and explaining the effect of resistance training. It then covers diet, including adequate protein, healthy fats and moderate carbohydrates, followed by sleep, with a study linking short sleep to lower testosterone. A page on stress explains why raised cortisol can compete with testosterone production and how relaxation and mindfulness can help. The chapter ends with Testosterone Replacement Therapy, outlining the forms it comes in, such as injections, patches, gels and pellets, and when it may be considered for people with low levels.