seems there are a complex range of factors that explain why this might be the case. They include biophysical responses to exercise (for example by boosting the release of endorphins), but it has also been shown that exercise increases our sense of ‘self-efficacy’, or our perceived ability to succeed in a task. These benefits can all flow from setting a goal to increase, often by modest amounts, the amount of physical activity we do. So, as you can see, it’s important to think about goals that can help make you and others healthier and happier.