All other options create barriers rather that prevent them. Many people are afraid or wary of exercising because of inaccurate information they have received in the past. Once they know what are myths and what is fact then they can decide for themselves what type of exercise to pursue. Inexpensive classes are very useful as many people cannot afford to take up many types of exercise classes or sign up for membership to a gym. Doing some investigation in your area might prove successful for a cheap class or way of exercising. By taking a physical education class at school you can get a taste for exercise and physical activity and find out what it involves and make up your mind about whether or not to continue.