I fear I am losing LBM, can someone check my math?

I fear I am losing LBM, can someone check my math?

Use the mirror, scale weight and how your clothing fits. Disregard estimated BF numbers generated by your scale.

 

I fear I am losing LBM, can someone check my math?

Thank you for all the help this is getting me thinking again.
That thread above matches my calculations exactly:
210 lbs / 100 = 2.1lb per %?
210 lbs x 21% BF = 44lbs BF
210 lbs - 44lbs fat = 166 LBM
But I'm dumb and easily confrused.

Believe me, the clothing is fitting much better and the mirror shows improvement, I'm just concerned that I'm burning LBM like I did last time.

 

I fear I am losing LBM, can someone check my math?

210 lbs, 21 % bodyfat:
2.1 lb lost:
210 lbs x 0.79 = 165.9 LBM
Fat mass: 44.1
After loss:
Fat mass 42
42/207.9x100 = 20.2%

 

I fear I am losing LBM, can someone check my math?

I would agree with that math.
So assuming I've been losing 2.3-3.3lbs /week without a significant change in estimated BF% then one could conclude that a good amount of weight lost was LBM?

 

I fear I am losing LBM, can someone check my math?

Yes.

Moreover, it implies that your maintenance intake is between 3,150 calories (based on losing 2.3 pounds per week) and 3,650 calories (based on losing 3.3 pound per week) at a average intake of 2,000 calories per day.

You need to set your caloric intake more rationally, aiming for a 10% to 20% deficit, if you want to optimize your outcome in terms of LBM preservation.

 

I fear I am losing LBM, can someone check my math?

Now that you are getting closer to a normal weight range, I think 2-3 lbs loss/week is a little aggressive. I would aim for closer to 1lb loss/week, but it is always case by case with this. Another thing to watch for is your lifts. Are you losing strength? If you are, it's a good sign that LBM is dropping too. But if you are new to lifting then you don't have to worry as much about the LBM loss if your diet is in check and you are on a good lifting routine. Just don't get in a hurry with it...patience is a virtue.

 

I fear I am losing LBM, can someone check my math?

By definition, LBM is everything that isn't fat. Thus a loss in LBM would include a loss of water weight, and not just muscle necessarily.

However, with a 2.3 - 3.3 lbs loss pr. week, it's highly unlikely that you're maintaining muscle optimally. As already pointed out by WonderPug, your activity factor is unlikely to be sub-1.4. I suggest upping calories to the point where you're only losing ~1lb pr. week.