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The features of an energy system are shown in the table - HSC - SSCE Personal Development and Physical Education - Question 18 - 2008 - Paper 1
Question 18
The features of an energy system are shown in the table. | Fuel | Creatine Phosphate | |---------------------|--------------------| | ATP production... show full transcript
Worked Solution & Example Answer:The features of an energy system are shown in the table - HSC - SSCE Personal Development and Physical Education - Question 18 - 2008 - Paper 1
Step 1
Which athletes would use this as their dominant energy system?
Answer
To determine which athletes use the creatine phosphate energy system, we need to consider the characteristics of this system. It produces ATP very quickly but in limited amounts, and does not require oxygen. Therefore, it is best suited for short, high-intensity activities lasting around 10 seconds or less.
- High-jumpers (A): This activity requires quick bursts of energy and falls within the energy duration provided by creatine phosphate, making this option valid.
- 400 metre runners (B): This race requires sustained energy over a longer duration, typically around 45 seconds to a minute, which is beyond the capacity of the creatine phosphate system, making this option invalid.
- Marathon runners (C): Marathon running is a long-distance activity that relies on aerobic respiration, thus making this option invalid.
- 200 metre swimmers (D): Similar to 400 metre runners, this event requires higher stamina and energy output over a longer duration, also making this option invalid.
Conclusion: The correct answer is (A) High-jumpers.