Driving fast is not necessarily a good thing. We want to get where we're going as quickly as possible, but we also want to arrive safely. If we drive too fast, we may encounter all sorts of problems. If we drive too slow, we're wasting time and may be causing traffic problems behind us. These competing

Even experienced exercisers sometimes find it difficult to know how much to do. For the beginner this uncertainty represents a significant stumbling block. Fortunately well-established guidelines and protocols exist to provide assistance to all exercisers, regardless of your skill level. In general,