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The strength training portion of your fitness plan can last anywhere from 20 minutes to an hour. Studies show that after about 60 minutes your glycogen (stored carbs or fuel for effective exercise) is spent and you risk overtraining; it is actually counterproductive to train much past that.  

People who have osteopenia have a lower BMD than normal, but it's not a disease. However, having osteopenia does increase your chances of developing osteoporosis. This bone disease causes fractures, stooped posture, and can lead to severe pain. You can take action to prevent osteopenia.

Your health professional may also want you to take a calcium supplement, often combined with vitamin D to help prevent osteopenia. Vitamin D helps your body absorb calcium and other minerals. It is found in eggs, salmon, sardines, swordfish, and some fish oils.

But in recent years, more researchers argue that it's not the most accurate way to measure body weight. For years, scientists have said that BMI can't distinguish between fat and muscle, which tends to be heavier and can tip more toned individuals into overweight status, even if their fat levels are low.

SMS stands for short message service. Simply put, it is a method of communication that sends text between cell phones, or from a PC or handheld to a cell phone. The "short" part refers to the maximum size of the text messages: 160 characters (letters, numbers or symbols in the Latin alphabet).