In her article discussing the impact of daily exercise on mental health, the author writes, "Engaging in just 30 minutes of physical activity every day can lead to remarkable improvements in mood and cognitive function. Not only does exercise boost your endorphins, but it also offers a wonderful way to clear your mind and relieve stress. By incorporating exercise into your routine, you are investing in your well-being in a fun and enjoyable manner."
What is the author's tone in this passage?