ilikeschool's questions

[melaniej]

With the work:rest ratio, they'll give you easy data to work with, so add up all the top row, and the bottom row, and then simplify it til you get the smallest fraction.

So for your example, my brief adding up (may be wrong but close enough)
got 93:60
which is close to 90/60
which is a 2:1 WR ratio
Pretty sure thats right, got answers?

[transgression]

Nope, no answers but I think you're correct.
Thanks for the help!

[mtwtfss]

In past exams in reply to the question: 'How can an athlete work above 100% V02 max?'

You can simply say: 'By working anaerobically' or something as simple...


Add up all the work periods, and add up all the rest periods...might be something like work = 93 rest=60 (if you include low)

so 93/60 =  1.55:1 = Aerobic dominant...

ATP = 1:4+
LA = 1:2-1:3
02 = 2:1-1:2

Do I include low intensity activity as 'work'? Haven't thought about this before....in an exam i would include it... depending on the total of the work and rest that is...

[transgression]

[IMG]http://img208.imageshack.us/img208/286/cvcxph5.th.jpg[/img][IMG]http://img208.imageshack.us/images/thpix.gif[/img]

How do you work this out?

[akkxn]

Ahhh at first i was stumped. But don't be distracted by the ml/kg shit. Look at the total energy release.

Notice how its 100 and the contribution fromthe aerobic and anaerobic systems are 50% each.

So all you need to do is figure out the proportion for the other times.

Note: I had to check my book cos I never bothered to memorise them

But the answers are:

Duration: 120s, Total Energy Released: 150, Aerobic: 65% (about 100 ml/kg), Anaerobic: 35% (~ 50 ml/kg)

Duration: 180s, Total Energy Released: 200, Aerobic: 75% (150 ml/kg), Anaerobic: 25% (50 ml/kg)


BTW: I sure hope this question or something similar doesn't pop up, it's a bitch to "calculate" using my maths-illiterate head

[transgression]

Yep! Thanks, I actually figured it out after I posted it. It is clearer now.
This was actually on last year's vcaa exam - where around 67% of students got 0 marks out of 4 or something.
It is also about FINITE CAPACITY, which i thought was interesting. The report also talked about how in previous years, students were able to relate finite capacity, but when they change the form around (like this), we actually don't. I see what they mean

[mtwtfss]

I sorta thought if you read the question properly you didn't need any PE knowledge whatsoever.

In the question it mentions something along the lines of: 'In each event the Anaerobic Systems were completely exhausted'

Look at 'row 1'...50 Anaerobic (Exhausted)

All the rest must be the same as the question gave us the answer

Finite capacity will probably be on the exam again, 'cos kids never get it right.

[transgression]

How would you justify: that in a endurance performer, lactate threshold is a better predictor of performance compared to Vo2 max?

Also:
What types of food (High Vs Low GI) would be suited -
Short event (10 minutes), 3-4 hours prior to event, 1-2 prior to event, and after event.
Marathon, 3-4 hours prior to event, 1-2 prior to event, and after event.

[mtwtfss]

Short events = normal glycogen stores are sufficient


Marathon: 3-4hours before = Low GI due to sustained release of glucose
1-2hours before i'd say don't eat food really
after High GI

[akkxn]

I sorta thought if you read the question properly you didn't need any PE knowledge whatsoever.

In the question it mentions something along the lines of: 'In each event the Anaerobic Systems were completely exhausted'

Look at 'row 1'...50 Anaerobic (Exhausted)

All the rest must be the same as the question gave us the answer

Finite capacity will probably be on the exam again, 'cos kids never get it right.

shit! I falled for it haha! Interesting how my answer kinda contridicts vcaa's obsession with finite capacity. I thought there was always interplay from all energy systems, even after "exhaustion"

[mtwtfss]

[/quote]

shit! I falled for it haha! Interesting how my answer kinda contridicts vcaa's obsession with finite capacity. I thought there was always interplay from all energy systems, even after "exhaustion"
[/quote]


You are right.

Nothing in the body is ever depleted, as far as i know.

So yes both the ATP-PC system and LA system will be working, but it will be at an extremely low amount compared to the aerobic system.

And isn't really considered a meaningful contribution.