CSCS Practice Questions – Exercise Science Part 3

Posted by on Apr 9, 2013 in Exercise Science, Practice Questions, Review Topics | 0 comments

The answer to the question from part 2 is:

B – 3 minutes.  According to the NSCA guidelines in chapter 1, the work:rest ratio for a 1 minute interval is specified in the following table:

[table caption=”Interval Training for Specific Energy Systems” width=”700″ colwidth=”60|140|100|100″ colalign=”left|left|center|left|left”]
% of max power,Primary system stressed,Typical exercise time,Range of work:rest
90-100,Phosphagen,5-10 seconds, 1:12 to 1:20
75-90,Fast glycolysis,15-30 seconds, 1:3 to 1:5
30-75,Fast glycolysis,1-3 minutes, 1:3 to 1:4
20-30,Oxidative, >3 minutes, 1:1 to 1:3
[/table]

The question was:

Usain Bolt has decided to work towards breaking the 400m record, and is interval training 400m repeats.  His 400m personal best is ~46 seconds, but for answering this question assume the exercise duration is 1 minute.  What should his rest interval be?

His 400m time of 46 seconds is no doubt a maximum effort, so perhaps that’s why the question tells you to assume a duration of 1minute.  Both to simplify the answer based on what the table displays…and perhaps we can assume he is operating at 75% of his max which would equal about a minute.  In any case the question tells us to assume 1 minute, regardless of what Usain Bolt might hypothetically do.  Keep in mind I made up the question 🙂

Since the exercise time is 1 minute, we look at row 2 and see that the work: rest ratio is between 1:3 and 1:4.  Since there is no option for 4 minutes of rest, we know that it must be B – 3 minutes.

Next Question!

What is the most important, followed by the second most important factor in determining what type of fuel your body burns during exercise?

A.  exercise duration, exercise intensity
B.  exercise  mode, exercise duration
C.  glycogen stores, exercise mode
D.  exercise intensity, exercise duration

hint – the table above might help!  Then again…it might not.

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