Functional aerobic impairment (FAI) assesses the difference between a person's aerobic capacity with that expected based on age, gender and usual activity level.
predicted maximum oxygen consumption in mL/kg/min:
(1) sedentary lifestyle (does not exercise at least once per week sufficient to perspire)
(1a) female: 42.3 - (0.356 * (age in years))
(1b) male: 57.8 - (0.445 * (age in years))
(2) active lifestyle (exercises at least once per week sufficient to perspire)
(2a) female: 42.9 - (0.312 * (age in years))
(2b) male: 69.7 - (0.612 * (age in years))
percent functional aerobic impairment (% FAI) =
= ((predicted maximum oxygen consumption) - (observed maximum oxygen consumption)) / (predicted maximum oxygen consumption) * 100
Level of Impairment
27 - 40%
41 - 54%
55 - 68%
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Specialty: Surgery, orthopedic