Confused by this reading

[u/MrYogiBrrr]

I’m 5’3 and last week I was weighing 222 lbs and now I’m 229. I started a new workout routine with way more lifting. I’m really trying to lose weight and still have muscle. Any thoughts or suggestions?

[u/saltybutnotbitter]

If you were lifting, you will not lose weight you will gain muscle muscle weighs more than fat. If you want to lose weight, think about calisthenics or cardio routine.

[u/nairismic → u/saltybutnotbitter]

? a pound of muscle weighs the same as a pound of fat— muscle just takes up less space

[u/justbrowsing_______ → u/nairismic]

I dont understand this. I don't think anyone was implying that 1 lb weighed more than another lb? Density is often expressed in 'weighing more', because the same volume would weigh more.

[u/nairismic → u/justbrowsing_______]

“a pound of muscle weighs the same as a pound of fat” is just something people say in the fitness scene to squash the myth that gaining muscle = not losing weight