I love running because it makes me feel great, which is good for my physical and mental health. Running can assist people in losing weight, staying in shape and improving body composition. Research suggests that the person of average weight will burn approximately 100 calories per mile run.Running increases one's metabolism, even after running; one will continue to burn an increased level of calories for a short time after the run.Different speeds and distances are appropriate for different individual health and fitness levels. For new runners, it takes time to get into shape. The key is consistency and a slow increase in speed and distance.