Exercise as disease detector.

Exercise is a well-known stress test for uncovering heart or lung disease, but it can also stress other organs and unmask a range of medical disorders. Practical case examples are given in seven areas: anemia, headache, hematuria, gastrointestinal problems, seizure, anhidrosis, and hypothyroidism. Recognizing the exercise-induced manifestations can lead to timely diagnoses that improve and save lives.