Physical fitness is something that many of us think about at the beginning of every year, then struggle with briefly and sink back into our usual habits. Still, fitness is something that can be improved upon any time of year. Read on for some helpful hints you can start using right away. If you would like to avoid unnecessary soreness following your routine run, always include a cool-down to allow the sudden build-up of excess lactic acid to circulate through your muscles. In addition to a brief walk following your run, always allow time to stretch your muscles to avoid any pulls or cramping. You should keep track of all…