I started doing brazilian jiu jitsu about 7 hours/week. My body was sore for the first 1 month. I also did a low carb diet (moderate adherence)
Keto generally reduces my hunger so I would skip dinner because the exercise would kill my appetite. I would then not be hungry until lunch the next day. This ended up turning into intermittent fasting.
I hit 170 after about 1.5 months which was a huge milestone. The intermittent fasting was really easy (which was strange) to the point where I am only eating 0 or once every 24 hours. This last week I started losing about .4-.5 pounds/day and so I lost another 4 pounds in the last week.
I believe it was the keto which kills hunger spikes, the massive exercise in the evening which killed nighttime eating which transitioned me into fasting.
If you had asked me if a year ago if I could easily not eat for two days I would have said no way. Once your body is burning fat, then it is easy.