Health issues so I fat-shamed myself into it 
When I was feeling at my most crap, fat, ugly and old before my time I took a photo of myself in my underwear - front, back and side views. Wrote down my measurements for upper arms, chest, waist, hips, thighs and calves. Wrote down how I felt, physically and emotionally - aching and fed up and wheezy, headaches all the time, no energy.
I lost 2 stone just swapping UPF - ready meals, takeaways, etc. and cooked from scratch instead. No exercise. It took about a week for my tastebuds to adjust and not much longer for me to lose the can't be arsed, it's too much effort feeling - my body was getting the nutrients it needed to function properly.
After that 2 stone - and better nutrition, I felt more energetic and also felt like I was getting my sparkle back. It gave me the impetus to become more active. I started doing some gentle exercise - walking more, just at my own pace - think couch to 5k but walking! I lost another 2 stone doing that.
I was 35 at the time. I'm in my 50s now and menopausal and I've never felt better. I feel younger than I did back then. More energy. All my health problems have vanished. I dropped 5 dress sizes. I rarely get ill even when everyone around me is snotting and sniffling.
I cringe and burn with embarrassment and shame when I look at that photo. I am not that person anymore - inside or out.
I really do believe "you are what you eat". I was eating crap and I looked and felt like crap.
Sorry, this is sounding like some sort of sermon now so I'll shut up! 
