Excellent observation Quilter and Alana! We should all remember that. Less muscle means burning fewer calories per day. Less muscle means you're losing your strength. My mother yo-yo dieted when I was growing up, often having only 1 slice of dry toast for breakfast and lunch - remember those days? How far we've come, eh? At age 80, she was so weak when she had a fall in the tub, that she couldn't pull herself out, or even forward to the tap, and sat there for 22 hours without water, becoming dehydrated. I promised myself that I will NEVER let myself get so weak, and now I have a gym membership so I can work on the weight machines to stay strong and get stronger!
Remember too, 1 lb. of muscle takes up less space than 1 lb. of fat!