I have a stress fracture in my foot. Currently, the consultant tells me that it's not healing as quickly as he would like due to my low bone density which I've recently found out to be due to celiac disease. I'm underweight and now trying to correct that. I'm also a triathlete so I'm trying to boost my calories whilst still keeping up some exercise. I've seen a dietician and got some high calorie drinks and tips on higher calorie foods but I wondered if anyone else could help with any tips they've found have worked as I'm desparate not to stop my one release of exercise.