Try getting into biking. I burn 1500-2000 calories (I’m not a small dude) in like 2 hours of road cycling. It’s relatively easy on the body compared to running as a bonus.
Are you sure about that number?
According to my tracker, I burn about 1000kcal per 60km, and I’m an normal dude. You probably won’t average 50km/h over 2h or something.
Given weight and road grade plays a role, they don’t need to average 50km/h necessarily. Still, 1kcal/hour seems quite intense for a regular exercise for me, but similarly large professional-level endurance athletes probably burn far more during serious training or competitions. 750kcal/hr seems manageable to me as a non-athletic person (supposedly I’ve burned 2340 calories over 2.7hours once… but I was totally wiped out afterwards IIRC). 1K/hr isn’t something I could maintain for more than about 1.5 hours even on the best of days.
Oh also another thing to check is weather your fitness tracker is reporting active calories or total calories burned. If it is the second one it’s giving you a feel-good number that includes calories you would have burned just by sitting on the couch staying alive. If your fitness tracker isn’t calculating a BMR you can estimate your Base Metabolic Rate fairly accurately with a calculator like this one.