Adding to the things that may not be accurate: BMI. BMI is an average that was reduced to a simple algorithm: BMI = weight (kg) / [height (m)]^2. In words: weight * (height * height). This calculation is intended to be a rough estimate to start with not the end all be all it has become.
Such a calculation is closer to "correct" at the middle or average height and weight. Tall people skew to a lower BMI, short people skew to a higher BMI. The taller / shorter we are the more the BMI skews lower / higher.
Body type also can skew higher or lower BMI. Not all of our bodies are built the same yet the BMI assumes they are.
The more muscle we have the more the BMI doesn't work right. Body builders show the extreme of this effect. Arnold at his younger best would weigh in at a very high BMI. But us humans can build enough muscle to screw with our BMI.
BMI is a rough starting place. Once you have the number, it doesn't really matter. How we feel, our health both physical and mental, how our eating and exercise are feeling. These are the real measures.
Whew, done with BMI. But the post goes on.
Then another part of this whole thing is Goal Weight. Simply, It may be wrong.
If we're aiming for a certain BMI or BMI range the BMI discussion above should cause us to think. If it's a weight we were when we were young(er), our body has changed since then. If it's a weight our surgeon or medical team created it is another number intended as an idea that has been turned into a goal to measure us by. If it's based on those on-line calculators they give the average progress and result of someone with our demographics: We as individuals are not average.
Goals are not written in stone. As a target to aim for when you start the process, it's fine. As you progress things change. Our bodies may tell us the original goal is unrealistic. If our body is happy and healthy at a different weight perhaps we should listen.
The thing with goals, we are over the moon when we lose 10, 20, 50 pounds more than goal. Look how unconcerned we are about missing our goals by 10, 20, or 50 pounds. Why is missing goal by 10, 20, 50 pounds the other way so devestating? We misjudged our goals both ways. Ultimately, it's where our bodies that decided where to stop.
If we have goals, we should continually evaluate them and change them as necessary. We have more information about our process now than we did when we started. More now than last week. Be honest. Be realistic.
Good luck,
Tek