While the body does burn some calories even when a person is just sitting or sleeping, for most people, the more active they are, the more calories the body will burn. However, this can take time. To lose one pound of fat, a person needs to burn 3,500 calories. For many, however, this is almost impossible to reach. That’s when a nutritionist consultation is required and a non-invasive “liposuction” is the fastest and safest way for weight and fat-loss.