It is nearly impossible to post the questions seperately due to the fact that th

Question

It is nearly impossible to post the questions seperately due to the fact that they are all related with one another.

Bob, an untrained 40 yr old male is running on the treadmill at 5mph and has the following data;

VO2= 2.27L/min

            HR =153bpm

            Mass = 75kg

            His VO2 max = 2.8L/min

Question 1) What is the relative oxygen consumption for him at 5 mph? How many METs is that?

Question 2) What relative intensity (% of his VO2max) is Bob working at while running at 5 mph?

Question 3) If his 65kg friend Jill is running next him at 5mph and is working at 50% of her VO2max, then what is her relative VO2max?

Question 4) What is the Resting Energy Expenditure (REE) for Bob and for Jill in Kcal/min?

The subject Bob from # 2 trains for 12 weeks on an intensive aerobic training program and increases his absolute VO2 max by 15%. He gets on the treadmill now and runs at the same workload of 5mph. How, if at all, would the following variables change? Explain the rationale of each of your responses.

Question 5) Absolute VO2 at 5mph

Question 6) % of relative VO2max at 5mph

Question 7) Q at 5mph

Question 8) HR at 5mph

Post-training and weight –loss

What if in addition to the 15% increase in his absolute VO2max, the subject lost 10 kg of fat mass? Explain what would change for each of the following vs. just the absolute VO2max improvement of 15%.

Question 9) Absolute VO2 at 5mph (explain)

Question 10) Q at 5mph (explain)

Question 11) HR at 5mph (explain)

Question 12) Relative VO2max (show calculation)

Question 13) Relative intensity as a % of VO2max (show calculation).                             

Explanation / Answer

VO2 max is an index of maximal oxygen consumption by an individual during an exercise program.

This gives us an estimate of individual's aerobic capcity and endurance.

Absolute VO 2 (Lit/min)max gives us a value of total O2 consumption whereas relative VO2 max (ml/kg/min)gives us a value per kg of body weight.

Methods of measurement:

VO2 max is measured using following parameters and equipments

Incremental exercise on treadmill/bicycle ergometer

O2/CO2 estimation of inspired and expired air

ventilation

cardiac output

* when O2 consumption becomes static even after increasing workload, VO2 max is achieved.

so For Untrained BOB:

Question 1.His absolute VO2 MAX is 2.8L/min

His relative VO2 will be Absolute VO2MAX(ml/min)/weight(kg)

=(2800/75)= 37.3 ml/kg/min

Question 1 part 2

MET or metabolic estimation of task gives us an estimation of expenditure of energy by body during various active and passive activities.

1 MET is defined as the energy expensed during rest, it's the resting metabolic rate.

Normally 1 MET is 3.5 ml/kg/min

In this exercise BOB is consuming 37.3 ml/kg/min(Relative VO2)

Therefore it is (37.33/3.5)= 10.6 MET(approax)

Trained BOB

after 12 weeks

His current absolute VO2 max is Higher by 15%

So His current Absolute VO2max is (2.8*115/100)L/min=3.22 L/min

So his new relative VO2max will be 3220/75=42.9 ml/kg/min

considering his previous relative VO2 37.3

Total change is (42.9-37.3)=5.6 ml/kg/min

% CHANGE is approaximately 15%(answer to question 2)

Q 3.

Jill is working at 50% of. Bob s VO2max

So it is 2.8÷2 = 1.4 lit/min

Her weight is 65 kg

So her relative VO2 max is (formula explained above)

(1400/65)ml/kg/min=21.5 ml/kg/min

Question 4

From above (q1 part 2)

Bob is exercising at 10.6 MET

As per formula

Energy expenditure= (MET*Body weight*3.5)÷200

=(10.6*75*3.5)/200=13.9 kcal/min

For Jill

Her relative VO2 max is 21.5 ml/kg/min

Which is equal to (21.5/3.5)=6 MET(explanation in q1 part 2)

So her energy expenditure is

(MET*Body weight*3.5)÷200

(6*65*3.5)/200 =6.825 kcal/min

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