For many people, beginning any exercise routine can seem intimidating. Where to start? How do I begin? Well, exercise is actually very similar to medical prescriptions. Did you know that physical activity and exercise also require doses just like medical prescriptions? Exercise doses need to be exact in order to achieve the goals and benefits desired. As with a medical prescription, an exercise prescription must include the name of the medicine as well as the dosage to be effective. The factors for determining exercise prescriptions are referred to as FITT.