Quoted from mcluvin:
When I started at the beginning of the year, it would kick my a** to get an extra couple thousand steps a day. My back would be killing me. It didn't take much weight loss to make the back pain go away and I got into a pretty good system of doing at least 10K a day. I know some would laugh at walking as exercise, but it makes a difference.
Walking is great exercise! When I moved to New Zealand from LA 12 years ago my feet were sore the first few weeks as I was walking and taking public transport instead of driving. I then started walking hills and that turned into running them but you have to start somewhere!
As to fitbit I have had two a charge HR which broke after about 10 months and now a charge 2. The 2 is about 7 months old and is getting a bit weird, not doing notifications and the HR function has always been crap except for resting. It shows 90 when I am more like 160. Whatever I get next is going to be more robust and not a fitbit.