So the questions is, with so many workout options and classes out there to choose from (along with gym membership prices that never seem to go down), what classes are the most effective at maximizing your calorie burn and giving you the most bang for your buck?

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The amount of calories that you burn doing any given type of exercise is dependent on several factors: age, sex and weight, along with the duration and intensity of the workout. This can leave a pretty wide range when trying to find out how many calories you can burn taking a class at your local gym. Read on to find a list of the most common and popular exercise classes out there along with their calorie-blasting spectrum.