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.
Gaining and losing weight is really about math. In order to lose a pound, you must burn or cut out 3,500 calories per week (500 calories a day). Unfortunately on the other side of the equation, if you consistently overeat an extra 500 calories each day. . . well. . . that's how you end up not fitting into your pants.