People vary a lot. One of my friends lost 10kg of muscle mass in less than a month without being sick. He just stopped going to the gym every day and went on holiday. If your natural build is skinny as a rail and you’re buff and you stop some people just deflate like a balloon.
No they didn’t, lol. If you lose 10 kg of MUSCLE mass in a month, you’re seriously sick, like starving sick.
And there’s no “natural skinny as a rail”, you either eat and workout enough, or you don’t.
> And there’s no “natural skinny as a rail”, you either eat and workout enough, or you don’t.
Just as some people are short and others tall people produce different amounts and proportions of hormones which leads them to put on muscle easily or not.
For the most extreme ethnic examples of this consider the Kalenjin of East Africa who are skinny and wildly over represented as marathon runners and Polynesians who are wildly over represented as rugby players and in US Football, who are more muscular.
In that case, there should be fat losses too (fats are like 2x more energy dense). for reference - 1hour of running is ~650kCal. Also so much water retention (50%) is really high, lots of steroids?
If they're starting out at a decent size I could definitely believe someone dropping 10kg after a month. However I have a hard time believing anyone would be visibly different after a single week's worth of working out. However I can sympathise, I was in that position myself and I guess I had a sort of (very mild) body dysmorphia where I felt like I looked chunky and bloated if I missed just a couple of sessions in a row. I realise now that I was being ridiculous, I was in very good shape and it was all in my head. I picked up running and gym again earlier this year and I'm making a conscious effort not to fall into that trap again
Unless theres other factors (probably), I'm not sure my "brick shithouse" (not my words) build matches this. Also of course, sods law, this week didn't seem to have any effect on my overall weight
