It is important to take breaks from running even during training. This can reduce the risk of overuse and ultimately injury. Corkum recommends continuing aerobic exercise such as swimming, cycling or rowing. These activities give the body a break from the movement of running, she explains, while further increasing the heart rate and strengthening the lungs. For those who don't have access to fitness equipment or cardio equipment, she recommends a walk.
"Not all runners need aerobic cross-training," she says, "but every runner should do some kind of strength training, yoga, or stretching exercises to keep the body balanced and strong from head to toe."