Hi. My partner is keen to get back to full fitness after his gastric sleeve operation in 5 weeks time. He is hoping to reverse his type 2 diabetese. My question is, due to the restriction on the amount of fluids you can take onboard, how do you keep hydrated and get sufficient nutrition if you want to take part in physically demanding sports like iron man competitions or cycling and running? Has anyone done this after recovering from surgery?

I am running 4-5 days a week. I didn't start until about 5 weeks post-op. I would start slow and gradually work your way up. I just sip fluids practically all day long. I don't run in the heat of the day either, I run early in the morning. I think you need to match your activity level to how many calories you are eating. I can run 12-13 miles a week on 1000 calories with no problem. Remember most of us have plenty of stored fat to burn for energy.