Is it true that if ur younger u tend to bounce back faster?

I was looking through the photos on my husbands phone and I always used to think somewhat negatively about my weight and it would bother me if I gained a few pounds. Keep in mind I was right where I was supposed to be I’m 5’7 and was about 130 pounds. I’m 20. Now I think to myself about how stupid my negative thoughts were about my weight and just hoping that I go back to my old weight and that my breasts don’t look to bad or sag really after breastfeeding is over 😥 rn I’m 33 weeks and 6 days and 157 pounds,pretty proud of myself for gaining the weight I needed to though.