How can I prevent a charley horse? Every time I exercise, I get interrupted by a painful muscle spasm that lasts for about 15 minutes. What to do?

Muscle pain. Muscle pain and spasms after exercise can be quite severe. Keep in mind the kind of activity that is bringing it on, and seeing if there is something about your exercise regimen that needs adjusting. Hydration with water and perhaps electrolytes can help this condition, but look carefully and keep track of what kind of exercises are triggering the spasms and consult with your docotor.