.Beginners and regular runners all fall foul of the most common cause of injury: progressing too fast, too soon. Increase mileage or speed, but not both. A newcomer's biggest measure of success at six months would be to have built up to three or four consistent runs a

of the foot. It usually indicates an overpronated foot – one that strikes on the outside of the heel and rolls inwards (pronates) excessively. Over time, this can cause many different types of overuse injuries.Best last: Straight or semi-curvedBest shoes

GETTY IMAGESMost runners know about injuries. They're almost part of the game. Run long enough or hard enough, and you'll probably come down with an ache that will temporarily sideline you.Fortunately, most running injuries are short-term. After a