Hi, Last week, I returned from vacation. I maintained a healthy diet throughout the week, though likely too few calories. Since I returned five days ago, I increased my calorie intake (+500 daily, with much of it an increase in protein powder and fruit) to my normal, pre-vacation level and also completed four half-marathons. In this period of only 5 days, however, I have also gained 10 lbs -- all of it in my stomach. My abs (typically six pack) are totally gone, and my stomach is distended and incredibly flabby and jiggly.
What could cause such a rapid increase in weight? Is this belly fat?
I visited my DR yesterday; though he was concerned ("10 lbs in 5 days is not good"), he provide no insights and only requested blood work, which was normal. A second DR requested an ultrasound, which didn't reveal any problems.
I thought someone on this forum may be able to provide more help. I'm not sure if I should be really concerned.
Thanks for any recommendations on what could have caused this and what I can do to return to normal.