My friend Arnold wanted to know how he can tell how many calories are burned in a workout. Fantastic question! I responded that it depends on the type of workout, the duration of the workout, one's weight, and the level of exertion used. Of course, that wasn't the most helpful answer. I may as well have told him, "Got no clue, buddy!" So I did a little research and found a helpful site:
Using their database, you can plug in your weight and the length of time to specific exercises and get an estimate for calories burned. I cannot vouch for its accuracy, but then again, even the machines at the gym aren't 100% reliable. But it can give one an idea of what exercises are the best calorie burners.
So thanks, Arnold, for asking this question. Now go out and burn off some calories!