Question

1. Calculate the NET VO2 for someone walking on a treadmill at 3.5 mph and a 12% grade.

What is 80% of this person's VO2reserve?

2. What is the predicted VO2 for 62 kg man cycling at a resistance of 147 watts. You must show all your work for full credit.

3. Why do exercise scientist have objective criteria to see whether a true VO2 max was reached? List/name at least 4 of the criteria that must be met for a TRUE VO2max test. What is it called when the criteria is not met?

4.

Please give a general description of the differences between two component models vs. multi-component models for estimating body composition. Ex: what components do they look at? Is one preferred over the other? Why should we care about the components that are being measured?

Answer 1

1. Calculate the NET VO2 for someone walking on a treadmill at 3.5 mph and a 12% grade. What is 80% of this person's VO2reserve?

• 1. Convert speed in mph to m.min (3.5 x 26.8= 93.8) 1 mph= 26.8 meters per minute

• 2. Calculate horizontal component. H = speed (m.min) x 0.1 (93.9 x 0.1 = 9.38 ml.kg.min)

• 3. Calculate vertical component: V= grade (decimal) x speed x 1.8 (.12 x 93.8 x 1.8= 20.26 ml.kg.min

• 4. Calculate total VO2 by adding H, V, and R (resting) components: VO2= H + V + R (9.38 + 20.26 + 3.5)= 33.14 ml.kg.min

• Convert VO2 to METS by dividing by 3.5:    (33.14 /3.5 = 9.46 METS

What is 80% of this person's VO2reserve?

The formula used to calculate the percentage of VO2R (%VO2R) = (VO2peak – VO2rest) (intensity fraction% in decimal ) + VO2rest

VO2peak =33.14ml/kg/mt

Vo2 at rest =3.5ml/kg/mt

Percentage of VO2R (%VO2R) =(33.14-3.5) 0.80 +3.5 = 23.71+3.5=27.21ml/kg/mt