> Why would we expect calorie burn to be related to steps and heart rate? How could a wearable measure energy expenditure?
A lot of exercise equipment manufacturers will display very approximate numbers, based on assumptions the user can adjust if they want (but they seldom do).
If you jump on a treadmill at the gym and set it to a brisk walk, it'll show you a 'calories burned' count that goes up by 7 calories per minute based on your speed and an average adult's weight.
It doesn't have to be all that accurate to motivate the user to just do 5 more minutes, and to put a checkmark on a product feature list.
A lot of exercise equipment manufacturers will display very approximate numbers, based on assumptions the user can adjust if they want (but they seldom do).
If you jump on a treadmill at the gym and set it to a brisk walk, it'll show you a 'calories burned' count that goes up by 7 calories per minute based on your speed and an average adult's weight.
It doesn't have to be all that accurate to motivate the user to just do 5 more minutes, and to put a checkmark on a product feature list.