Before starting your workout, always remember to warm up, as this will prepare your muscles for physical activity. Spend five minutes performing a low intensity version of your main workout, and incorporate stretching exercises. This will increase your body temperature, and increase blood flow to your muscles, making them much more flexible.
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.