I am a relatively fit guy (180 cm, and normally 81 kg athletic) and a few weeks ago I started a daily routine to lose fat and gain some core muscle. I train martial arts so the goal is to get faster and stronger. The problem is that I have actually gained some fat in the process and apparently I'm not gaining muscle.
What I'm doing is waking up at 6:20 everyday, having a big glass of a fruit shake, running 40 min on the street, then lifting some weights for another 30-40 minutes, another big glass of fruit shake and go to work. Then at night I train martial arts every other day.
During the day I try to eat a bit every time I get hungry, whether it's some light healthy eating or an actual meal. This generally means (in addition to the shakes I mentioned) to have a small lunch about 11:30 am, a sandwich around 15:00, another sandwich around 17:00, dinner around 19:00 and then some other snack at 21:30.
I find it kind of hard to keep track of the calories I'm spending during the day in order to balance that out with the calories I eat (since I don't have any means to know how many calories I burn by running or hitting the gym or fighting) but with the amount of exercise I do regularly, I find it really hard to comprehend me to be eating more calories than I'm using.