Toning Your Body and Building Muscles (Girl's Fitness Fact #9)

All young women want to look and feel their best. To achieve that goal, many work on toning their bodies and building muscle mass. But when's the right time to start working out to build muscles? The Girl's Fitness Guide has the answer.

When you reach puberty, your body starts making the hormones that build muscles. Until then, exercise only tones your body. If you want to build muscle mass, wait until after puberty. In the meantime, eat healthy foods and stay active. That will keep you strong and ready to start building muscle mass when your body is ready.

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