I'm very overweight. I'm tipping the scales at 18st 13lbs, aside from when I have birth to my son last year I was 22 stone which I manag d to lose without trying really, this is the biggest I've been although I've always had issues with my weight up and down since I was a child. I don't want to be fat anymore, I want to be healthy and slim and just feel better. My mobility is bad now, all my bones ache, I have back problems, knee problems, you name it. I know that my weight isn't helping me. I want to lose 80lbs so around 5-6 stone. Ice already made some big dietry changes. And trying to be in a calorie deficit. I struggle to do vigorous excercise because I'm always in so much pain, I also have bad anxiety mainly health anxiety and terrified that my heart won't take the exercise and I'll die!! Silly I know. I do walk alot and most days walk between 4-5 miles pushing my son in his buggy. I don't really understand how it works . I know that I need to burn more calories than I consume but how on earth do you burn 1500 calories in one day alone? (Just an example) especially when mobility is bad like mine? Is there anyone that can give me some advice, some stories or just words of encouragement? Now that I've sat here and said it aloud I feel like I'm being unreasonable to think I could actually lose 80lbs and get to my goal weight. Any opinions or thoughts appreciated.