Cardio is good, but it is crucial to strengthen your muscles.

Fitness tip:

You need more then just cardio!

While aerobic exercise is an important part of a complete fitness program, you can't rely solely on hours of the elliptical if you want to lose weight. Strength training helps build and maintain muscle mass and stimulates the production of beneficial hormones. Plus it's crucial for speeding up your resting metabolism. Here's why every woman should lift weights.