I've lost about 13 pounds since the last time I calculated my LBM and today it showed that 6 of that was LBM. I've only lost 2 inches off my waist, but 4 off my hips and 4 off my tummy and also an inch of two off each thigh. I've changed my ratio of carbs to fat (more C, less F), but am keeping protein to about 90-100g/day. And I am lifting more weight in the gym than I was before...

I've just been using the CKD parameter calculator (waist and weight only)to do rough BF% calculations, so this isn't very scientific, but here's my question: am I losing a significant amount of muscle? Should I be worried?

Dani

Waist/weight calculations have an error ratio of +/- 5 to 10 percent depending on the formula used. So I wouldn't put much into those measurements. If you want a true read out of your body fat you can either go with calipers or the submersion test. Later being more accurate and also expensive.

If you are keeping your calories up, getting adequate protein (which it looks like you are) and lifting weights then you probably aren't losing as much LBM as you think.

Dani, based on the fact that you're losing significant inches along with the weight I'd be inclined to think that you're dealing with a fairly significant margin of error. Losing some LBM when you lose a fair bit of fat is unavoidable, but I doubt that 50% of what you lost was muscle

Nat

Thank you, ladies. I know it was a dumb question. I guess I just needed to hear some other smart people tell me I was being dumb. I'm going to the gym now and I'll see if I can get some caliper measurements done. Thanks again!