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If you are not in great shape to begin with, it isn't recommended you try this system because of a greater injury risk. If you still have considered trying it, it's recommended that you enter a good shape in advance. This can be easily accomplished by performing exercises on a regular basis and simply being consistent. Particulate smog is a mixture of solid and liquid particles which are suspended in mid-air that you just breathe. It is best to classify air particles from the aerodynamic properties as these properties determine the removal of them from the air, and where they deposit inside your breathing.