Concrete and cement are not interchangeable terms. Cement is the dry powdered substance that is mixed with sand, gravel and water to create concrete. The gravel component in concrete is sometimes referred to as crushed rock or aggregate. Mixing sand, gravel, water and cement in the right proportion is essential to producing durable, high-quality concrete.
Know the numbers. In order to lose one pound, you will need to burn 3,500 more calories than you consume in a day. How many calories you burn in a given day just by existing will depend on your current weight and level of physical activity. You can calculate this by multiplying your weight by ten.
Just a few things: Think about what you regularly eat, what your calorie needs are, and how to count calories. It takes approximately 3,500 calories below your calorie needs to lose a pound of body fat. It takes approximately 3,500 calories above your calorie needs to gain a pound. At this point, you know how many excess calories it takes to gain a pound or deficit calories to lose a pound (3,500), and you know about how many calories you need (in  My Personal Profile ).