Probably a really stupid question...
I keep hearing that the only way to lose weight is to burn more calories than you take in. That doesn't make sense to me. Let's say somebody is really trying to lose weight, and they normally consume 2,000 calories a day. They now try for 1,000-1,500 a day. They also exercise for 30 minutes a day, which is reccommended.
Let's say they run 3 miles in 30 minutes. One mile burns off 100 calories.
So, they burn 300 calories a day, and take in 1,500 calories a day. How in the world can they lose any weight? They are taking in 1,200 more calories than they are burning, even with running 3 miles. Am I making sense? They are cutting their calorie intake down, and exercising extreme amounts a day, yet how can they burn more than they take in with a 1,200 calorie difference?