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The World Health Organization provides PAL categories for different activity levels, from sedentary (1.40-1.69) to vigorous (2.00-2.40). Understanding how is PAL calculated is essential for health professionals and individuals to accurately assess daily energy expenditure and tailor nutrition and fitness plans accordingly.

New research indicates that common fitness trackers are only about 50-70% accurate at measuring energy expenditure, but that doesn't mean tracking exercise calories is useless. For anyone aiming to lose, gain, or maintain weight, understanding how to count calories when exercising is a valuable skill that complements your dietary habits.