Individuals with an exercise addiction are characterized by their compulsive exercise behaviors, an overinvolvement in exercise, and the presence of an activity disorder—meaning they exercise at a duration, intensity, and frequency beyond that required for sport. A rigid schedule of intense exercise is maintained, accompanied by strong feelings of guilt when this schedule is violated. Exercise addicts may be driven to work out despite exhaustion or injury. Intense exercise addiction can lead to permanent physical damage, as the body is not allowed to recuperate between workouts. (
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"Exercise Addiction and Eating Disorders", Hardvard Education