Reasons to Exercise Regularly

3. Regular physical activities increase the production of natural antioxidants, which help protect skin cells from damage. They also stimulate blood flow and slow down the appearance of signs of skin aging. 4. Exercise causes changes in parts of the brain that regulate stress and anxiety. They also increase brain sensitivity to hormones like serotonin and norepinephrine, leading to positive emotions. Scientists have documented the positive effects of exercise on patients with depression.