How many calories does swimming burn?

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 The number of calories burned while swimming varies depending on factors like the intensity of the swim, your weight, and the stroke you're using. On average, a person can burn anywhere from 400 to 900 calories per hour while swimming. 

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This range can increase with higher intensity swimming styles like butterfly or interval training sessions. It's essential to remember that individual calorie expenditure may differ, so it's helpful to use a calorie calculator or fitness tracker to get a more personalized estimate based on your specific metrics and workout intensity.