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.
This process is known as a calorie deficit. When you can maintain this deficit, you'll lose weight at a slow, steady rate. One pound of fat, in theory, is equal to 3,500 calories; as such, you'll lose a pound upon burning an excess of 3,500 calories. Losing 1 to 2 pounds per week -- which requires an overall deficit of 3,500 to 7,000 calories -- is a realistic weight-loss goal.