Injury is the most common reason for runners retiring from the sport, especially as far too many attempt to run through pain without thought for the consequences. Chronic injuries that is, long-standing ones are invariably more difficult
pain it is. If it’s a cramp, rest for a couple of minutes and massage the area. Having a drink, especially a sports drink containing electrolytes, will also help. If it’s more of a sudden tightness, in the calf for example, stretch the muscle, and again