Doing 100 sit-ups doesn't burn very many calories -- only about 13 to 40, depending on your body weight.

The keys to losing weight are maintaining a healthy and nutritious diet and consistently engaging in various cardiovascular exercises. People seeking a challenging, new workout can try boxing as a form of losing weight.

Doing any type of cardio is effective for hip fat loss. Doing it consistently and at a high enough intensity will get better results.

Regular exercise on an elliptical trainer helps you burn calories, which is key in the battle to lose weight. Getting on the machine every day doesn't guarantee weight loss, though.

Academic studies, after school jobs and extracurricular activities can quickly consume teenagers' calendars. With busy schedules and multiplying obligations, the recommended 60 minutes or more of physical activity each day might initially seem impossible.

While the most famous Victoria's Secret models, like Alessandra Ambrosio, Miranda Kerr, Marisa Miller and Heidi Klum, all have bodies that look effortless, there's a lot of behind-the-scenes work to get them photo-shoot and runway ready.

Exercising at night can be a great way to lose weight. Whether you head to the local gym to lift weights or simply take a little stroll around your neighborhood, you will burn calories to aid in your weight loss goals. Getting the proper nutrients when training at night is very important.

Losing weight doesn’t require signing up for an expensive gym membership. Wilting away the pounds with an at-home workout is not only convenient, but it's also effective. Whether you have your own personal home gym or no equipment at all, you can lose weight and get your heart rate soaring every day.

If you're injured, losing weight is not only difficult, but the entire situation can create a downward spiral of increasingly poor health. Because you're hurt, you can't exercise to help yourself lose weight. The extra weight impacts your health, including your ability to heal from the injury.

During your reproductive years, many life events can alter your menstrual cycle, including pregnancy, breastfeeding and perimenopause. Your hormones fluctuate as you get older, and you may find that your periods gradually or suddenly become closer together or further apart.

Lean-looking legs are a desirable trait and can be yours when you follow a structured fitness program. Genetics only partially determines the shape of your body. For example, some people may naturally have more muscle in their legs, while others may have thinner thighs.

There are many myths surrounding the topic of weight loss. Many people think there is one magical exercise, treatment or supplement that will shed those dreadful pounds. The bottom line is it takes proper rest, nutrition and exercise if you want to lose weight.