Which of the following is a benefit of regular physical activity?

Regular physical activity is associated with numerous benefits, and improved mental health is one of the most notable. Engaging in exercise promotes the release of endorphins, which are chemicals in the brain that act as natural painkillers and mood elevators. This biochemical response contributes to feelings of happiness and euphoria, often referred to as the "runner's high."

Additionally, consistent physical activity can help reduce symptoms of anxiety and depression, improve overall mood, and enhance cognitive function. Many studies demonstrate that individuals who incorporate regular exercise into their routines report better stress management and emotional resilience.

The other options present conditions that are detrimental to health. Increased cholesterol levels and decreased heart function are associated with a sedentary lifestyle and poor physical health. Similarly, decreased energy levels typically result from a lack of activity, rather than regular exercise, which is known to boost energy and reduce fatigue. Therefore, the significant positive impact of physical activity on mental health stands out as a key benefit.