My theory...
I let others define who I am and how I look.
I have let my mother, my brother and now my husband define what I look like. I weighed 132 lbs when I was 17 and my brother told me I was fat. I looked a few pictures of me back then, and I was faaar from fat. My mother never complimented me, only critisizm from her lips. Her idea of being a mother is to tear me down. IE: On my 40th birthday, we went to her house (yup packed up all 4 kids and drove 65 miles because it was too inconvenient for her to come to my house *sigh*). The last thing she said to me before I got up and walked out was: "Now that you are 40, are you gonna cut your hair? It looks like Sh*t !" Oh, thanks Mom.
I now remember what it was like when I was 19 and moved into my first apartment. I worked out everday. I didn't eat alot cause I was broke, but I made decent choices. When I was younger I was much more physically active and enjoyed working out. I even ran a 3K when I was 8 months pregnant. I have reclaimed my life and reclaimed my body. To heck with everyone else.