While running can cause injuries like shin splints and stress fractures, that doesn't mean it's bad for you. The benefits of running, like improved cardiovascular health and strong bones, outweigh the risks. To reduce your chance of injury, make sure you're increasing your speed and weekly mileage slowly.

Why running is bad for your body?

Excessive running may thicken the heart tissue, causing fibrosis or scarring, and this may lead to atrial fibrillation or irregular heartbeat. Prolonged exercise may also lead to "oxidative stress," a buildup of free radicals that may bind with cholesterol to create plaque in your arteries.

Is running bad for your joints?

Knee and joint pain may be common complaints among runners, but chances are slim that arthritis is the culprit. In fact, multiple studies have shown that regular running strengthens the joints and actually protects against development of osteoarthritis later in life.