They say that the average person should walk 10000 steps a day. This would be about 5 Miles (8.1 km). However most people would only do 3 or 4. I do 7 or 8 miles a day but im … quite a walker.o stay fit and healthy, 10,000 steps a day. Our bodies are designed to walk without exerting much energy. Unless you are walking at a brisk pace (4mph +) you are not going to get the least bit fit. It also depends on what your definition of fit is.