Take time to stretch in between sets of weightlifting. Research has shown that people who stretch while waiting to start their next set of lifting weights have stronger muscles than those who just sit and wait between sets. Stretching is a little thing you can do to strengthen yourself while you're resting.
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.