21 Bizarre Side Effects of Becoming a Running Junkie
9. Pulled Muscles

Strengthening the muscles is one goal achieved by running, but if one is not careful, a pulled muscle can also be part of the process. It is essential to know the body's limits and not be so hard on the muscles while running. When a muscle is pulled, it requires immediate attention. A little massage and few minutes rest will help the muscle recover, and one can continue exercising.
10. Feeling Weightless
Running long distances like that of marathons, can make the body feel lighter and even bring on a sensation of weightlessness. This feeling is due to the body going through mild fluid loss which will return to normal in a short period. Too much fluid loss will have negative impacts, so it is essential to keep the urine a pale yellow color by drinking at least a liter of fluids before and during a run.