I am a 38 year old male, 5 ft 10in weighing 82 kg. I started going to the gym regularly about 5 months ago - 4 or 5 days a week, each day doing 1000kcal worth of cardio plus some weight training.
After approx 3 months I was down from 83kg to approx 77kg, however I then got ill and didn't go to the gym for two weeks. I was slightly horrified to see when I did go back that in those 2 weeks I had regained all the weight that I'd lost in the previous 3 months. I was back to nearly 83kg!
I have since been doing the same regimen for the past month and a half or so and my weight has hovered around 82-83kg. My diet has been pretty much the same both before and after I started going to the gym regularly, maybe improved a little since I started - I aim for around 2000-2500 kcal per day (though that usually falls down at the weekend).
Any idea how this could happen? And how to remedy? It's slightly depressing...