Question thread

[Wally]

it's chapter 4 TYK q's

[Aqualim]

ok for Q. 2a. they said;
The Interplay of the runner would be different from that of Fig. 4.19 because the 400m runner does not work maximally from the start of the race.

Very vague answer they gave, but still all of their answers are like that

[Wally]

Haha soo stupid considering we are relying on it for exam help!!

[matt123]

How would the energy system interplay for a sprint cyclist differ to a 400 m runner, assuming the same performance time?

hey buddy . i did pe last year and havnt touched it every since .. so dont quote me if im a tad off in the explanation
however

this is how i would go about answering the question.

both the sprinter and the cyclist would utilize all 3 energy systems at the same time , however , the difference is in the one that is predominant during the races.
the sprinter , due to high anaerobic nature and speed of the race , will have the ATP-pc system predominantly as his energy source THROUGHOUT the race as an overall, however at the start of the race , before the gun , at rest , the aerobic system is dominant , when he kicks off , the ATPPC system is largely dominant up until the 8-9 second mark , where the lactic acid system will be utilized for approx 40% of the energy supply.

the cyclist however , will also dominant with the aerobic system before the race, however , as the gun is pushed , the atp-pc system is dominant till 8-10 second , then the lactic acid system takes over.
the lactic acid system is the dominant system for the overall race , however as the race progresses , the aerobic system becomes more and more used , up untill the end of the race ( 30-40 second mark) , where the aerobic system is approx 35-40%.

the main difference is that the sprinter is using ATP-PC system and the cyclist is Lactic acid system

lols man . like i said . its a bit shabby of an answer .. but its the best i can give with my crappy fading PE memory lol

goodluck.