
Remember that adding this workout along with a speed workout once a week (on separate days) into your running routine will help make you a lean, mean, running machine. Well, maybe not mean, but you get my drift. The lower-body workout is perfect to add to a day you're doing an easy short to mid-distance run.
If you're currently in training for a big race, I recommend holding off on adding the lower-body workout to your routine until after the race. With anything new, your body will go through a period of acclimation and you may even experience a short period of slower running as your body adapts to the workouts and speedwork. Once you do start, stick with it though and your body will recover and get stronger and faster.