[kiba]

There is scant to zero literature to suggest exercising raises metabolism. Recent research by Herman Pontzer shows the opposite, that calories burned with exercise are negated later through lowered BMR and NEAT. So if you do a 400-calorie run and then eat a 400 calorie cookie, you will still get a net 400 gain, or close to it.

You could achieve a constant NEAT by having a daily step goal or some prescribed amount of activities outside your exercise routine. I am supposed to do 2 hours of exercise per day plus give or take 10K steps. This can easily make me extremely active by American standard.

Now, surely your BMR will compensate, but probably only to a certain point.

In the end, it's probably easier to just eat healthy and eat less rather than trying to increase your caloric expenditure, but that's also rather hard to do for a variety of reasons.

[imp0cat]

Also, regular exercise will have more benefits than just increasing your caloric expenditure. It keeps your muscle mass from deterioriating as you age.

[lazyasciiart]

“Supposed to”? Is this a lifestyle/athletic goal, or a medical recommendation (or something else)?