Motivational wrote16lbs of muscle in 5 weeks with heavy steroid use would be difficult, so it's very unlikely that you gained that much muscle.
What probably happened was that you ate enough calories to maintain a weight of 176, and this caused you to gain weight up until you reached that weight.
Then again, are you sure the diets were identical? Like have you been following a planned out diet the whole time or are you just guessing? Because gaining 3 lbs per week would take pretty big caloric surplus.
Honestly it's impossible to tell without knowing your height, weight and diet etc. I mean, you could have just upped your water intake and be carrying a bunch of water weight around
I didnt necessarily have a diet at the time because I was just going.. I was trying to eat better then what I was eating but it was still only like chicken and such. But I feel as though I eat more real meals now then I did back then. It could have been water but that was then and I don't drink that much water and I still weigh the same.. I am 6' and was 6' then also. Age is 22 and was 21. It was last year and like I said prior to working out I stayed the same weight for many years and now about 5-6 months later I haven't moved in weight besides when I eat big but then I am usually back to the norm of 171-173 within the next day.. not even with a restroom needed.. I think just the high metabolism provides that weight reduction of a few pounds.. idk just seemed kind of weird with the burst of weight in that 5 weeks.. I am 100% agreeing with you that it was not muscle.. but at the same time when I was working out I used a program the gym offered and they just had a paper with the workouts you were doing that day and you recorded the weight you used then turned the paper in at the end of the workout, came in the next day and they had the new weight you were supposed to do for that day and every day basically except for a couple my weight always increased because I was easily hitting the reps / sets. So, we said in the beginning weeks I was finding my weight like where I could really start pushing myself and then even after that though every next time I went in I was continuously being able to hit the weight they were suggesting.. like growing lmao.. I know I don't have god like genetics lol it was just weird and yeah like I said I now gain no weight.. I gained no weight before that period but only in that period where I was actually working out.
And, like today since I'm re getting the itch to start working out I got myfitnesspal.. so far today I have eaten 3,670 calories out of the 3420 calories suggested to gain 1lb a week and I haven't had dinner yet. It was all junk food tho so I think thats why I don't get affected.. but I didnt even eat alot today compared to normal.. So I think on average I would eat close to 4000 in random crap that is not good for me.. but I still will have a real meal for dinner.. idk I think I don't gain weight cause of the metabolism but not sure why I did gain weight when I was actually being active..