[QUOTE=What Exit?]
I saw something in a couple of threads that has me a little worried. People have mentioned you should not lose more than 2 or 2.5 lbs per week.
I started my diet May 15th and as of July 5th I have lost 28 lbs. That is in only 44 days or 3.84 lbs per week. I started at 239.5 and this morning I was 211.5 lbs.
**Am I harming myself? **
I have been dieting by low fat intake and exercise.Jim
[/QUOTE]
First off: congrats on the rapid progress!
I am the originator of one such thread you mention – similar to you, I found myself losing weight at about 3+ lbs. a week (I started out at 240 lbs. on 5/16 and found myself at 220 after “just” 6 weeks), and got worried that this was actually too fast based on traditional guidelines.
I’ve done some research, and the primary reason this rule of thumb exists is to warn you of the possibility that you are losing protein (lean, or muscle) mass in addition to fat, or even losing mostly lean mass instead of fat. This means your calorie deficit is too great (or has been sustained at too high a level for too long) and your body has gone into “starvation mode”, where it tries to ration out the fat in your system for a famine scenario (as fat is the more efficiently burning fuel) by sacrificing lean mass first.
This is bad because really it’s having a high body fat percentage that is unhealthy, not body weight per se. Also, muscle burns more calories than fat, so if you “go off” your diet/training regimen you will not only gain back the weight more rapidly (since you’re burning less of it due to the lower lean mass), but end up with a higher body fat percent than when you started if you end up at the same weight!
However, the “1-2 pounds per week” is only a rule of thumb. Different people have different metabolisms, and if you are a very big person (i.e., very tall, fairly muscular under that fat, or very overweight), you will likely lose a lot more pounds of fat a week than 1-2 pounds, particularly in the early going.
The easiest way to determine if you are going OK is to monitor your body fat along with your weight loss. Do the math and make sure most if not all of your weight is coming off the fat.
I’ve done this for the past several weeks and I’m now confident that my current 3+ pound a week rate is OK:
Three weeks ago (6/13) – 227.5 lbs., 27.3% body fat
As of this morning (7/06) – 217.5 lbs., 23.5% body fat
So I’ve lost 10 lbs. over 3 weeks (using a regimen similar to yours), which is a potentially dangerous rate by rule-of-thumb guidelines, but three weeks ago my “lean mass” was about 165.4 lbs. (yes, I know pounds are not a unit of mass but I don’t think in kilos), and now it is 165.5 – unchanged within the tolerance for measurement error.
I’m using a Tanita scale that definitely has a margin of error for the BF measurement, but the fact that the figure is so steady gives me comfort that I’m losing pretty much only fat. I’ve tried using the AccuMeasure calipers but I can’t get consistent readings, and am happy with the Tanita scale so far.
Finally, if you do find yourself losing lean mass, your choices are simple: either exercise less, or eat more. Eating more and continuing to exercise at the same level is actually the better choice, as exercise builds/maintains muscle mass and raises your metabolism. Eating regularly (4 or 5 small-to-medium meals, as opposed to 2 or 3 big whopper meals) also helps to keep your metabolism high (and to keep hunger away!).
So feel good about your weight loss, and good luck going forward!
PS - It has also been anecdotally proven to help weight loss if you give up rooting for the Y@nkee$ and become a Mets fan! 