I was wondering which is the most effective way to burn calories and if there is a difference between the same amount of calories burn but through different workouts or different time spent. So i usually do cardio on the treadmill. Depending on how tired or not i will either run or walk. If i run, it's usually at around 7mi. I ll burn around 550 cals over 35mns If i walk, i usually walk at around 3.5/4.0 miles but at a 15% incline. And that will also burn around 550 cals over 35 mns. I do feel like much more tired after running BUT i do feel my belly getting thinner faster. Does that make sense?