7 Deadly Fitness Sins: How to Stop Sabotaging Your Workout

SIN #1: Pride

Of course you feel virtuous when you work out. But sometimes your exercise habits can take a devilish turn and ultimately undermine all your hard work. Here's how to stop sinning and get the results you deserve.

PRIDE: You refuse to listen to your personal trainer or instructor.

Experienced exercisers may think they know it all, from proper form to personal limits, but in the long run, this prevents them from maximizing their workouts and increases the risk of injury, says Chris Freytag, a Minneapolis-based trainer and author of Move to Lose.

REDEMPTION: Get your money's worth.

When you're taking a class, one of the most important things you're getting is expertise. As long as the person has the right certifications and clearly understands your goals, she can and should provide you with tons of information. A good instructor will also help you stay on top of new trends and techniques to help keep your routine fresh and fun.