I'm starting Cross Fit tomorrow. Do I have to disclose that I've had the surgery?

How far post op are you?

It's been over a year. Nope. Why does he or she need to know? Unless you have some kind of standing issue that prevents you from doing a move. But even then. Bad knees or an old rotator cuff injury don't have anything to do with your surgery. Your weight, yes, but the actual surgery you had, no.

I didn't tell mine. I think as long as you are eating some Protein before workouts where you won't get dizzy etc. I saw no reason to share with my trainer. I lost weight and wanted to get in shape is really all she needed to know.

Some trainers will want to quiz you about your diet and tell you what to eat. You don't have to disclose the surgery but be prepared to tell her or him something like "I'm following my doctor's orders with respect to diet" or "I'm working with a registered dietician on that" -- otherwise they will sometimes push and push and want you to eat 3K calories a day or something ridiculous. I would avoid telling them exactly how many calories you are taking in -- that will freak some of them out because they think it's impossible to live on so little (they have no clue what they are talking about obviously).

If the trainer needs to know yes, but if you think you can handle it I don't think it has to be a yes. You could always say, I had surgery recently and have to start slower then your average person. What kind of surgery? Stomach. Leave it a that.