Depends, I think, how much you exert yourself. For 2+ yrs my fibro was mild and controlled by once a day 60mg Cymbalta. Then I joined Fit Body Boot Camp. I loved it for the 5 sessions I went to. It was hard work, but i went at it with gusto! Then I crumbled into a lump of fibromyalgia symptoms. (I had been walking 5 mi most days before this, now if I manage 2-3 very slow miles on the weekend when I don't work, I consider it a success.)
Walking is a great form of quiet exercise. Just saying, be gentle. You do not want to wake the beast

Swimming is the Best... especially if the gym has a therapy pool that is really warm.

Exercise is the best for Fybro. Diet and exercise. Unhealthy foods seems to also make it worse as your body goes into sluggish mode and then you have no energy for anything else.

I try to go to the gym every night after work for an hour. I think it helps.It releases endorphins supposedly. I walk 45 minutes the first night and the second night I do weights and walk 15 minutes. Give it a try!😊

I've read over and over again and also been told by my Dr. that the best exercise for Fibro is walking. I was instructed to start with 5 minutes per day and add 1 minute everyday from there. It is also good to break it up into a few sessions per day once you do longer stretches ie. 2 or 3 10 minute sessions per day. If you live in a warmer climate a gym pass isn't necessary. I live in Canada and I have a treadmill that I intend to start using again after the holidays. For now I'm getting enough walking in by Christmas shopping. My local pool has water aerobics classes specifically for Fibro which I went to a few times and found the exercises a lot easier in the water than on land. It's all the changing involved especially in the Winter that I found too much.