What is a primary psychological benefit of regular physical activity?

Regular physical activity is well-known for its positive effects on mental health, particularly in improving mood and reducing stress. When individuals engage in exercise, their bodies release endorphins, often termed "feel-good" hormones, which can lead to feelings of happiness and euphoria. This biochemical response helps counteract feelings of sadness or anxiety and can contribute to a more positive outlook on life.

Additionally, regular physical activity is associated with lower levels of stress hormones, such as cortisol. This can help individuals better manage stress and anxiety, making them feel more relaxed and in control. Exercise also promotes better sleep patterns and enhances overall well-being, which can further support improved mood.

In contrast, the other options point to negative outcomes. Increased anxiety and aggression are often associated with stress or certain mental health conditions, while less focus can stem from various factors, including fatigue or a lack of proper mental engagement, rather than from the benefits of exercise. Thus, regular physical activity stands out primarily for its role in enhancing mood and mitigating stress.