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This is an easy, low-impact, simple, accessible and, for the most part, enjoyable aerobic activity that is actually very good for you and will help you get in shape no matter how old you are. The price of leading an inactive lifestyle is high and it comes in the form of physical pain and obesity. A study from the University of Utah basically proved that people are made to walk. The result was that walking – not running – was most efficient way to stay in shape and lose weight while being easiest on your body.