Sarah Berry was a national-level runner at age twelve who was hospitalised with an eating disorder and spent almost two years in bed before learning to be well again. At the same time, her mother was sectioned for suicide attempts as she battled complex PTSD and severe depression. Decades later, Sarah is now a celebrated health and lifestyle editor for major newspapers.

The One Percent Rule is part personal story about reconciling your fears, part practical guide for incrementally improving your life, quickly. Broken down into sections on mental wellbeing, physical health and healthy habit creation – improving eating patterns, aligning circadian rhythms and deepening relationships – it expands upon the science behind the one percent, its applications and how it can better your life when you’re feeling time-poor and stressed out.