Is walking a good exercise for fitness, weight lose and mental health. Yes, it is low impact on your joints and will get your heart rate up. As for your mind it can help you clear your mind and focus on the walk and nature. I prefer walking on dirt rather then pavement because it’s softer and cooler and I try to pick a path with up and down hills. Treadmill walking is fine but outdoors and nature is a plus it can clear your mind and you get different scenery. Make sure you stay hydrated and have comfortable shoes. I have a headset I wear sometimes but mostly I like the sounds of nature. Walking and jogging can help boost stamina and endurance. There are so many websites and information you can look at today, but just get out there and do it try it worse that might happen is you feel better!