Heartburn during exercise??

got2befitnow

The last 4 or 5 times I've done a spinning class, I've been getting mild heartburn. This is really strange because the only time I've ever had heartburn before is when I was pregnant (and I'm definitely NOT pregnant - hubby has had that taken care of, so I'd be in a lot of trouble if there was a bun in the oven!).

I've been doing these classes over my lunch hour, so I haven't eaten anything before going (I eat when I get back to work). I drink a lot of water all day and always have water with me during the class. It's not so much fun getting distracted by heartburn when I'm already dripping sweat and breathing hard! :grumble:

I have just gotten back into regular exercise, so could it be that my body is just adjusting to working out again? Has anyone else ever had this? Does it just eventually stop happening?