You already exercise at least 30 minutes most days of the week (bravo!). Still, that’s different than training for a 5K. This week, we’ll ease your body into running regularly. You’ll start your workout with a series of dynamic warm-up moves. Then, you’ll do eight walk-run intervals to train your muscles for the 5K distance (which you’ll probably complete on day one!). Finally, you’ll cool down and stretch. I know you’re psyched, but try not to push it too hard. You should be able to sing your favorite commercial jingle during your walk and run without gasping for air. Do this workout three or four times weekly. Feel free to stay active on your off days (cross-train, or take a Pilates or yoga class!), but make sure to save at least one day for total rest.