For our earliest ancestors who hunted and gathered, movement meant survival. Our brains evolved to reward physical activity. What happens when we stop moving? Today, on average, we spend around 70 percent of our lives sitting or lying completely still. Our sedentary lifestyle is not only bad for our bodies, it can also result in anxiety, depression, and a lower overall IQ. Williams explores the research behind brain health and physical activity. She shares the good news: even the simplest movements can reactivate our bodies and open up a hotline to our minds, improving our overall well-being and longevity. And we don't have to spend countless hours in the gym. In fact, exercise as we understand it misses the point. Veteran science journalist Caroline Williams explores the cutting-edge research behind brain health and physical activity, interviewing scientists from around the world to completely reframe our relationship to movement. Along the way she reveals easy tricks that offer a more stimulating and productive way of freeing our caged minds to live our best life. -- adapted from jacket