Staying fit may help someone burn calories and lose weight. This happens by burning fat during the exercise period, and gaining muscle by stimulating your muscles during a workout. Here are some examples of popular activities and how many calories they burn per hour:
Walking: 150-300 per hour
Lifting weights: 350-550 per hour
Running: 590-1,000 per hour
Please note, calories lost in a one hour period can vary based on body weight and intensity of the exercise.