Mood: when asked to rate their mood immediately after periods of physical activity (going for a walk, doing housework) and periods of inactivity (reading a book, watching television), participants felt more content, more awake and calmer after being physically active.When you exercise, your brain chemistry changes through the release of endorphins (or 'feel good' hormones), which can calm anxiety and lift your mood.

Stress: when events occur that make us feel threatened or upset, our body's defences cut in and create a stress response, which may make us feel a variety of uncomfortable physical symptoms. These symptoms are triggered by a rush of stress hormones – the fight or flight response. Adrenaline and noradrenaline raise our blood pressure, increase our heart rate and increase the rate at which we perspire. This causes us to feel stress. Physical activity is a good output for relieving these symptoms and consequently relieving stress.

Self-esteem: how we feel about ourselves and how we perceive our self-worth is a key indicator of our mental wellbeing and our ability to cope with life stressors. Physical activity has been shown to have a positive influence on our self-esteem and self-worth. When you start to see your fitness levels increase and your body improve, it can give your self-esteem a big boost. The sense of achievement you get from learning new skills and achieving your goals can help you feel better about yourself and lift your mood.

Depression and anxiety: physical activity is increasingly used as an alternative treatment for depression. It can also reduce levels of anxiety in people with mild symptoms and may also be helpful for treating clinical anxiety.One study has found that by increasing your activity levels from doing nothing to exercising at least three times a week, you can reduce your risk of depression by almost 20%.

Social and Emotional Benefits: being around other people is good for our mental health and social networks, plus you can maximise the benefits of exercising by doing it with other people. Lots of us enjoy being active because it's fun. Researchers have shown that there's a link between the things we enjoy doing and improvements in our wellbeing overall.

Don't forget the physical benefits too. Being physically active can reduce your risk of some diseases, improve the health of your organs and bones, help you to maintain a healthy weight and give you more energy.