Parents' Health

Hi,

I'm new to this forum. So I apologize if someone has already covered this topic. I have successfully lost almost 50 lbs and I feel absolutely great compared to before. Anyway, everyone in my family is overweight to a point that I am concerned for their health. I am especially concerned for my parents. They are both getting up in age and I'm afraid they'll be dead before they can enjoy grandchildren. My point being, How can I help them successfully start some kind of routine that is healthier for them? I just don't want to make them feel bad about themselves but they know they're severely overweight and won't change anything. Any suggestions would be appreciated.