### Description

A person's oxygen uptake during running can be estimated based on the running speed and the incline of the surface.

Conditions:

(1) The person is running at a constant speed > 134 m/min (> 5 miles per hour).

(2) The equation can be used at speeds of 80 - 134 m/min (3-5 miles per hour) if the person is truly running.

(3) This equation should not be used if the person is running overground, over up and down grades.

oxygen uptake in mL per kg per min =

= (resting oxygen uptake) + (horizontal oxygen uptake) + (vertical oxygen uptake)

horizontal oxygen uptake =

= 0.2 * (running speed in meters per minute)

vertical oxygen uptake =

= 0.9 * (running speed in meters per minute) * (grade)

where:

• The resting oxygen uptake is 3.5 mL per kg per min (1 MET).

• The 0.2 factor in the horizontal oxygen uptake is the regression constant for converting m/min to mL per kg per min.

• The 0.9 factor in the vertical oxygen uptake is the regression constant for converting m/min to mL per kg per min.

• The grade is the percent incline expressed as a decimel (for example, an X% incline is expressed as 0.0X).

• The vertical grade = 0 if (a) the running is done on a level surface, (b) the person starts and ends running at the same point.

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