Even when you want to keep up with the latest fashion trends, some clothing just isn't suitable for your workout routine. Because you'll be working up a sweat with most exercise routines, you'll need to steer clear of the following materials:

• Heavy Lycra: Too much "stretch" material can make you uncomfortable and make it hard for your skin to breathe during a major sweat session. Make sure there's enough cotton blended into those Lycra pants or tops for optimal comfort.

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• 100 percent cotton: While this type of clothing is great for summer and casual events, you will probably sweat to the point of discomfort. Look for cotton and poly blends designed to wick away moisture instead.
• Fleece: Fleece is not a workout-friendly material when you're working up a sweat indoors, but is appropriate as layering material when you're working out outdoors. Try and avoid fleece to ensure optimal comfort during your indoor workout.