Study categorizes the most likely contributor to common running injuries.
When many runners ramp up their training, such as when pointing toward a marathon, they increase mileage and intensity simultaneously. This study suggests that if you have knee problems while doing so, you may have upped your mileage too quickly. Conversely, if your knees are fine but your calf, Achilles or plantar fascia start hurting, your body may be okay with your mileage increase, but isn't yet ready to handle the increased intensity.
Via KreuzFit, Peter Mellow