Smiling, change, goal setting, and confidence are all contagious. So is exercise. If you are working with the right group or following the right routine you may be surprised with potential you have, and just how contagious exercise can be. So much so that you might find yourself at local fitness stores buying everything from running shoes to yoga mats. You may even find yourself ecstatic when you realize you can do to unassisted pull ups. A year later you might go down to your pull up bar expecting to do your new normal work, five pull ups as your …