It's not about weight, it's about health. If you're supposed to be a certain weight and have a certain BMI at your height, for your GOOD health that is what it should be. I have a friend who moved out of state for 6 months and came back. She looked completely different, yet her weight stayed the same. She had been eating right and working out. Doesn't matter if you're skinny or heavy, both can be unhealthy.