Which of the following is a fact mentioned in the passage?

Read the given passage and answer the questions that follow.

Engaging in regular physical activity is not only beneficial for physical well-being but also has a profound impact on mental health. Studies have shown that exercise releases endorphins, chemicals in the brain that act as natural painkillers and mood elevators. Additionally, consistent exercise has been linked to reduced symptoms of anxiety and depression. Contrary to common misconceptions, it doesn't require intense workouts; even moderate activities like walking or yoga can contribute to improved mental well-being. Making exercise a regular part of one's routine not only supports physical fitness but also nurtures a positive and resilient mindset.