Switch: How to Change Things When Change Is Hard is a bestselling book by brothers Chip and Dan Heath, published in 2010. Whether you’re a health and fitness professional, just starting out in fitness, a recreational athlete, a superhero ­in­training, or anything in between, you’ll get something out of this book. It outlines a framework for successfully making – and sticking to – changes in your life, which you can apply to nutrition, fitness, and other health habits.