High School

A man weighing 165 lbs runs at a pace of 9 min/mile outdoors on level ground. What is his estimated gross VO2?

Answer :

Final answer:

The man's estimated gross VO2, based on his weight and running pace, is approximately 45 ml/kg/min. Considering his actual weight in kg, the gross VO2 would approximately be 3375 ml/min.

Explanation:

The gross VO2 of the man is calculated using the ACSM metabolic equation for running. According to this equation, the VO2 (oxygen uptake) is estimated to be approximately 45 ml/kg/min.

The equation is: VO2 = (0.2 x speed) + (0.9 x speed x grade) + 3.5, where the speed should be in meters per minute and the grade is in proportion of vertical rise to horizontal distance. Assuming a percentage grade of 0 (for level ground), and converting 9 min/mile to 268.22 meters per minute, the VO2 is calculated to be around: 45 ml/kg/min.

However, since the weight is given in lbs, this figure would need to be adjusted to fit his body mass, which is approximately 75 kg (165 lbs. / 2.2 = 75 kg). Thus, his gross VO2 would be a product of this figure and his weight, resulting in an estimated gross VO2 of 3375 ml/min.

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