Smartwatches and fitness trackers have become essential tools for monitoring health and fitness, but their calorie-tracking precision may not be universal. According to a recent study, a higher body fat percentage can significantly decrease the accuracy of a smartwatch's calorie-burning estimations.

Most modern wearables estimate energy expenditure by combining optical heart rate data, motion sensors, and generalized algorithms. However, differences in individual body composition, particularly higher body fat levels, can challenge these standard formulas, leading to noticeable discrepancies between the tracker's metrics and actual caloric output.

While wearables still provide valuable insights into general activity trends, users may want to avoid relying solely on these figures for precise diet or workout planning. Check the original report on Medical Xpress for full details and findings from the study.