Some people jokingly say they're allergic to exercise. But the truth is, many of the materials used in gym equipment, pools, and locker rooms are known to cause wheezing, sneezing, coughing, and watery eyes in even the most seasoned gym rats living with allergies. Even worse, harmful chemicals linked to all sorts of serious health problems, including thyroid disease and even obesity, are commonly found inside health clubs.

If you don't want to undo all your hard efforts with chemicals that will make you fat and unhealthy, a few simple strategies can help you to steer you clear of allergens and harmful compounds in the gym. (Of course, it's always a good idea to figure out what you're actually allergic to in the first place.)

Here's how to ID and avoid potential gym pollutants and allergy inducers: Yoga Mats The Pool The Locker Room Disinfectants and Air Fresheners The Smoothie/Snack Bar Workout Clothing Your Exercise Technique