#$%^&*AU2019100752A420190815.pdf#####1002634485 ABSTRACT Embodiments are disclosed for a wireless wearable computer with fitness machine connectivity for improved activity monitoring using caloric expenditure models. In an embodiment, a method comprises: obtaining machine data from a fitness machine while the user is engaged in a workout session on the fitness machine； obtaining, from a heart rate sensor, heart rate data of the user； determining, a work rate caloric expenditure by applying a work rate calorie model to the machine data； determining, a calibrated maximal oxygen consumption of the user based on the heart rate data and the work rate caloric expenditure； determining a heart rate caloric expenditure by applying a heart rate calorie model to the heart rate data and the calibrated maximal oxygen consumption of the user； and sending to the fitness machine, at least one of the work rate caloric expenditure or the heart rate caloric expenditure. 28
