Heat problems and heat cramps related to jogging can be caused by fluid imbalances, medications, dietary insufficiency, vomiting or diarrhea, among other factors. If the condition keeps reoccurring, the advice of a physician should be sought. Some preventive measures that can be taken include: (1) running during the cooler hours of the day; (2) watching the humidity and temperature and adjusting workouts accordingly; (3) not wearing a fully closed hat or head gear; (4) not taking salt pills unless so directed by a physician; (5) taking water breaks; (6) wearing cotton clothing and allowing body surfaces to be exposed; (7) keeping track of weight loss; (8) being aware of concurrent medical problems; (9) taking time to acclimatize to environmental changes; and (10) maintaining a slowly progressive program. (DC)