Allergic to Exercise?

The past week or so, I've been getting my fill of watching the Olympics at night, and am tired just watching all of those athletes exercise. Many people have excuses for not exercising: Not enough time, too tired, not in the mood, gym too expensive. Some people may say, half jokingly, that they are "allergic" to exercise. Is this like saying you're "allergic" to work? Or "allergic" to your spouse? Maybe not - it is possible to be allergic to exercise. Or, at least, experience allergic reactions as a result of exercising:

• Exercise-Induced Anaphylaxis
• Exercise-Induced Asthma
• Exercise-Induced Hives (Cholinergic Urticaria)