So I'm a veteran at this whole lifestyle now. I exercise daily and eat well most of the time! I've lost 100lbs overall! Recently I had a friend who is really unhealthy and significantly over weight ask me to help him workout at the gym. This is a big step for him because he doesn't like admitting he's unhealthy. I know he reached out to me because he knows I understand his struggle but I don't even know where to begin with him at the gym! Any suggestions? I was thinking about couch to 5k which actually even that might be a struggle for him but does anyone else remember what was helpful at the beginning stages of working out ??

I'm at the beginning of exercise myself and I hired a trainer for twelve sessions. It helps a lot. On alternate days I just walk the treadmill for an hour.

As you can tell by my profile picture I like biking. I do a lot of indoor biking which is not bad on the knees. When I was heavy to lose weight I use to run and caused knee problems (I have had a knee replacement). Walking on the treadmill or eliptical is also a good place to start. I agree with JustWatchMe a trainer is good in giving advice.