Ugh, seriously noticed this exact thing today!! Down 20 pounds since late April, and what used to be a fuller shape back there is starting to look deflated and flat.
Not sure if it's just from being basically sedentary for the past four and a half weeks thanks to a broken foot, but honestly, it's just gone.
Was hitting protein pretty consistently, 80-100g daily, before the injury, but my eating fell apart these last few weeks. Genuinely useful nudge to get my protein habits back in order, thank you.
Also hoping there's some way to rebuild that muscle back!!