Introducing myself

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I'm obese from have children and being disabled from 7 ruptured disc in back. My exercises are limited due to the pain it causes. I am wanting to lose my weight back off. I had lost 120 before I had children which was 20 years ago. My daughter is over weight and very depressed because of being over weight. I am wanting to help her and try to motivate her to exercise. But if I can't exercise, how can I motivate her to do it.