Cramping that appears after running __________.
lasts for about 30 minutes.
The cramping which appears after a burst of physical activity, usually lasts somewhere between a few minutes to about 30 minutes. This is because the chemicals that cause cramping are washed away by blood during that time.
Cramping that lasts more than 30 minutes is actually soreness caused by muscular wear and tear. It usually takes a day or two to subside.