The Energy Expenditure Index (EEI) can be used to evaluate a patient's economy of walking.
Parameters:
(1) heart rate at rest in beats per minute
(2) heart rate while walking at a steady pace in beats per minute
(3) walking speed in meters per minute
energy expenditure index in beats per meter =
= ((heart rate while walking) - (heart rate while resting)) / (walking speed)
The EEI varies for a patient depending on walking speed, with slow and fast paces higher than a comfortable walking pace. The lower the EEI the greater the economy of walking.
A graph of EEI versus walking speed can be used to compare energy expenditure in clinical settings.
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