Activity calculators

Distance and calorie estimates from steps and the user profile. More...

Functions
uint32_t	activity_private_compute_distance_mm (uint32_t steps, uint32_t ms)
	Estimate the distance covered by a number of steps.
uint32_t	activity_private_compute_active_calories (uint32_t distance_mm, uint32_t ms)
	Estimate the active calories burned covering a distance.
uint32_t	activity_private_compute_resting_calories (uint32_t elapsed_minutes)
	Estimate the resting calories burned over a period.

Detailed Description

Distance and calorie estimates from steps and the user profile.

Use the height, weight, gender and age stored in the activity prefs.

Function Documentation

activity_private_compute_active_calories()

uint32_t activity_private_compute_active_calories	(	uint32_t	distance_mm,
		uint32_t	ms
	)

Estimate the active calories burned covering a distance.

Rates above 120 m/min are considered running, which doubles the cost per meter.

Parameters

distance_mm	Distance, in millimeters.
ms	Time taken, in milliseconds.

Returns

Calories (1/1000 kcal); 0 if distance_mm or ms is 0.

activity_private_compute_distance_mm()

uint32_t activity_private_compute_distance_mm	(	uint32_t	steps,
		uint32_t	ms
	)

Estimate the distance covered by a number of steps.

The stride length depends on the user's height and on the cadence.

Parameters

steps	Steps taken.
ms	Time taken, in milliseconds.

Returns

Distance, in millimeters; 0 if steps or ms is 0.

activity_private_compute_resting_calories()

uint32_t activity_private_compute_resting_calories

(

uint32_t

elapsed_minutes

)

Estimate the resting calories burned over a period.

Uses the Mifflin-St Jeor resting metabolic rate.

Parameters

elapsed_minutes

Period, in minutes.

Returns

Calories (1/1000 kcal).