Obesity refers to excess body fat. Because body fat is usually not measured directly, a ratio of body weight to height is often used instead. It is defined as BMI [see body mass index]. An adult who has a BMI of 30 or higher is considered obese.

Fats that are liquid at room temperature, oils come from many different plants and from seafood. Some common oils include canola, corn, olive, peanut, safflower, soybean, and sunflower oils. A number of foods are naturally high in oils, such as avocados, olives, nuts, and some fish. Federal dietary guidelines [found at http://www.health.gov/dietaryguidelines ] encourage Americans to replace solid fats with oils when possible.

These essential fatty acids, found in foods like wild salmon and flaxseed, improve heart health and may also help prevent and treat arthritis, diabetes, depression, certain types of cancer, skin disorders, eye diseases, Alzheimer's disease, menstrual pain and PMS.

In resistance training is the maximum amount of weight one can lift in a single repetition for a given exercise. One repetition maximum can be used for determining an individual's maximum strength. One repetition maximum can also be used as an upper limit, in order to determine the desired load for an exercise (as a percentage of the 1RM).

Produced without the use of synthetic chemicals. For more information, check out the excellent "10 Reasons to Buy Organic" overview from the Organic Consumers Association.

In his 2007 book The Spectrum, Dean Ornish details a guide to achieve any goal, be it weight loss or reversing chronic disease. Ornish is a professor of medicine at the University of California, San Francisco, and the founder of the Preventive Medicine Research Institute; his method advocates responsible food choices, exercise, stress management, and seeking support from loved ones. All of this combines to have a positive impact on your health  and it's certainly hard to argue with that.

The most difficult part of the diet is its restriction of fat, which Ornish insists should be just 10 percent of daily calories. That's reasonable, but it may be hard to achieve if you're stepping straight over from a fast food-filled  'Western' diet. The book costs about $15.

Is a progressive bone disease that is characterized by a decrease in bone mass and density which can lead to an increased risk of fracture.