Walking is one of the most rewarding lifelong activities you can choose. While it may not be a huge calorie burner — the average person burns about 100 calories or so per mile — adding more mileage to your day can make a big difference in weight control. According to Harvard Health Watch, one 2009 study found the average person gains about 2.2 pounds a year during middle age. However, over 15 years of research, the study found that individuals who walked regularly gained significantly less weight than those who didn’t. Click here to learn more about the essential guide to walking and steps.