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.
Limit Your Calorie Intake. Losing weight boils down to simple math. To lose one pound weekly, burn or cut out 3,500 calories in the course of seven days. That breaks down to 500 calories per day. It's difficult to cut out that many by dieting alone, especially for someone who loves to eat.