The accuracy of fitness watches for the measurement of heart rate and energy expenditure during moderate intensity exercise.

CONCLUSIONS: Fitness watches relying on optical measures of HR underestimate HR compared to criterion measures during moderate intensity exercise. Despite providing a more accurate measure of HR, a chest-worn monitor does not provide a more accurate estimate of EE compared to fitness watches. The Fitbit provided the most accurate measure of EE when compared to the Polar Ignite watch and chest-worn device. PMID: 32734757 [PubMed - as supplied by publisher]
Source: Journal of Sports Medicine and Physical Fitness - Category: Sports Medicine Tags: J Sports Med Phys Fitness Source Type: research