How accurate are fitness smartwatches? Not very, says FIU study Tampa Bay TimesNobody Knows How Many Calories You Actually Burn. Not Your Watch, Not You, Not Science Men’s FitnessSmartwatch Trap! Fitness Watches Often Miscalculate Calories Yahoo Style UKThink you burned 300 calories? Be careful because your smartwatch could be wrong (by a lot) Evidence NetworkFIU Study Finds Smartwatches Overestimate Calories Burned During Exercise Digital Information World