Quoting ☮ Phuket:" there are certain ways to see how many calories you need for your body. with my p90x it came with ... [snip!] ... for my body. and then it had meals and stuff you could eat to suit your needs. I wonder if there is something online? "
Yep this...the really low calorie diets are more geared towards the people who are more stagnant and it also depends on how your body reacts. Most personal trainers will custom tailor and change diet, calorie counts and whatnot just because everyone is different.