Has anyone heard of or done a Resting Metabolic Rate? for those of you who don't know what this is, it's the number of calories that your body needs just to maintain vital body functions.and it can account for up to 75% of the total calories that your body burns everyday! there saying that 5 people the same age, same height, are eating the same foods and one person may be gaining and another loosing,or maybe even no changes at all. like i'm assuming i can eat 1,600 calories a day and come to find out with my individual RMR i was off by almost 1,000 calories and i would actually gain weight (EXAMPLE).they have one of these machines at a local health store the cost i believe is 40$, thats alot for me! i was just wondering if anyone has ever had this done? and has it helped?