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HMS, TIP 2025 HSC 23

Describe the potential effects of caffeine on an athlete's performance.   (4 marks)

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Positive Effects (choose 2)

  • Enhanced Mental Function: Caffeine stimulates the central nervous system. This improves concentration, alertness and decision-making during competition.
  • Faster Reaction Time: Central nervous system stimulation speeds responses to stimuli, helping athletes react quickly in sports such as tennis or basketball.
  • Increased Endurance: Caffeine reduces the perception of effort and fatigue. This allows athletes to sustain a higher intensity for longer in endurance events.

Negative Effects

  • Overstimulation: Excessive caffeine causes nervousness and tremors. This impairs the fine motor control required in precision sports such as archery or golf.
  • Sleep Disruption: Caffeine consumed later in the day can delay sleep and reduce sleep quality. This limits recovery and may lower performance in the following day’s training or competition.
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Positive Effects (choose 2)

  • Enhanced Mental Function: Caffeine stimulates the central nervous system. This improves concentration, alertness and decision-making during competition.
  • Faster Reaction Time: Central nervous system stimulation speeds responses to stimuli, helping athletes react quickly in sports such as tennis or basketball.
  • Increased Endurance: Caffeine reduces the perception of effort and fatigue. This allows athletes to sustain a higher intensity for longer in endurance events.

Negative Effects

  • Overstimulation: Excessive caffeine causes nervousness and tremors. This impairs the fine motor control required in precision sports such as archery or golf.
  • Sleep Disruption: Caffeine consumed later in the day can delay sleep and reduce sleep quality. This limits recovery and may lower performance in the following day’s training or competition.

HMS, TIP EQ-Bank 303 MC

Which performance benefit is primarily associated with caffeine supplementation for endurance athletes?

  1. Increased alertness and reduced perception of fatigue
  2. Enhanced muscle hypertrophy and strength development
  3. Improved oxygen delivery to working muscles
  4. Greater creatine phosphate storage in skeletal muscle
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\(A\)

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  • A is correct: The main benefit of caffeine for performance is increased alertness, reduced perception of fatigue and reduced perception of effort.

Other options:

  • B is incorrect: Muscle hypertrophy and strength development are benefits associated with creatine supplementation, not caffeine.
  • C is incorrect: Improved oxygen delivery is associated with iron and vitamin B12 supplementation, not caffeine.
  • D is incorrect: Creatine phosphate storage enhancement is the primary mechanism of creatine supplementation, not caffeine.

HMS, TIP 2016 HSC 16 MC

Why would athletes choose to consume caffeine to enhance performance in a high intensity activity of short duration?

  1. To increase water retention
  2. To increase focus and attention
  3. To increase synthesis of stored glycogen
  4. To increase metabolism of essential vitamins and minerals
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\(B\)

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  • B is correct: Caffeine enhances mental focus and concentration during high-intensity activities.

Other Options:

  • A is incorrect: Caffeine does not cause the body to retain water, and at performance doses it has little effect on fluid balance.
  • C is incorrect: Caffeine doesn’t directly increase glycogen synthesis processes.
  • D is incorrect: Caffeine doesn’t enhance vitamin and mineral metabolism significantly.

HMS, TIP 2020 HSC 13 MC

An endurance athlete might consider using caffeine supplementation to improve performance because caffeine

  1. relaxes the muscles to improve recovery time.
  2. increases the amount of creatine stored in muscles.
  3. promotes growth, repair and maintenance of muscle tissue.
  4. reduces the perception of fatigue and may promote glycogen sparing.
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\(D\)

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  • D is correct: Caffeine stimulates the central nervous system, reducing the perception of fatigue and effort. It may also increase fat use during exercise, sparing glycogen stores for later in an endurance event.

Other Options:

  • A is incorrect: Caffeine is a stimulant and does not relax muscles or speed recovery.
  • B is incorrect: Increasing muscle creatine stores is the effect of creatine supplementation, not caffeine.
  • C is incorrect: Growth, repair and maintenance of muscle tissue is the role of protein, not caffeine.

HMS, TIP 2022 HSC 16 MC

Why would an athlete in a weight lifting competition consider using a caffeine supplement 30 minutes prior to the event?

  1. The availability of fat stores will be stimulated so that they can be used as a source of fuel.
  2. The athlete will retain fluid levels, improve their glycogen stores and feel less fatigued.
  3. The central nervous system will be stimulated, increasing trait anxiety and improving concentration.
  4. The central nervous system will be stimulated, increasing the release of adrenaline and enhancing muscular contractions.
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\( D \)

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  • D is correct: Caffeine stimulates CNS, increases adrenaline release and enhances muscle contraction force.

Other Options:

  • A is incorrect: Fat stores not primary fuel for weightlifting performance.
  • B is incorrect: Caffeine does not increase fluid retention or glycogen stores, even though it may reduce feelings of fatigue.
  • C is incorrect: Increased anxiety would impair weightlifting performance.

HMS, TIP 2023 HSC 24

Discuss the effects of TWO supplements used by athletes to alter their performance.   (5 marks)

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*PEEL – Structure solution using separate PEEL methods for each side of the argument; [P] Identify the point, [E] expand on the point with a link to question asked, [Ev] apply evidence/examples, [L] linking sentence back to question.

Any TWO of the following

Caffeine

  • [P] Caffeine enhances performance through central nervous system stimulation.
  • [E] This stimulant blocks adenosine receptors, creating improved alertness and concentration.
  • [Ev] Tennis players benefit from enhanced mental focus and reduced effort perception. [
  • L] However, excessive caffeine can cause anxiety and impaired fine motor control, harming precision sports like archery.

Creatine

  • [P] Creatine improves explosive power through enhanced energy system capacity.
  • [E] This supplement increases phosphocreatine stores in muscles.
  • [Ev] Sprinters benefit from increased strength output and faster recovery between efforts.
  • [L] Conversely, creatine may cause water retention and gastrointestinal discomfort if hydration is inadequate.

Protein

  • [P] Protein supplements provide amino acids for muscle repair and growth.
  • [E] These supplements support recovery by delivering essential building blocks.
  • [Ev] Strength athletes benefit from enhanced recovery when protein is timed around training.
  • [L] However, excessive protein offers no additional benefits while potentially stressing kidney function.

Vitamin/Mineral Supplements

  • [P] Vitamin/mineral supplements address deficiencies limiting performance.
  • [E] These micronutrients support essential physiological processes.
  • [Ev] Iron supplements benefit endurance athletes with low ferritin by improving oxygen transport.
  • [L] However, excessive fat-soluble vitamins can reach toxic levels, harming health and performance.
Show Worked Solution

*PEEL – Structure solution using separate PEEL methods for each side of the argument; [P] Identify the point, [E] expand on the point with a link to question asked, [Ev] apply evidence/examples, [L] linking sentence back to question.

Any TWO of the following

Caffeine

  • [P] Caffeine enhances performance through central nervous system stimulation.
  • [E] This stimulant blocks adenosine receptors, creating improved alertness and concentration.
  • [Ev] Tennis players benefit from enhanced mental focus and reduced effort perception. [
  • L] However, excessive caffeine can cause anxiety and impaired fine motor control, harming precision sports like archery.

Creatine

  • [P] Creatine improves explosive power through enhanced energy system capacity.
  • [E] This supplement increases phosphocreatine stores in muscles.
  • [Ev] Sprinters benefit from increased strength output and faster recovery between efforts.
  • [L] Conversely, creatine may cause water retention and gastrointestinal discomfort if hydration is inadequate.

Protein

  • [P] Protein supplements provide amino acids for muscle repair and growth.
  • [E] These supplements support recovery by delivering essential building blocks.
  • [Ev] Strength athletes benefit from enhanced recovery when protein is timed around training.
  • [L] However, excessive protein offers no additional benefits while potentially stressing kidney function.

Vitamin/Mineral Supplements

  • [P] Vitamin/mineral supplements address deficiencies limiting performance.
  • [E] These micronutrients support essential physiological processes.
  • [Ev] Iron supplements benefit endurance athletes with low ferritin by improving oxygen transport.
  • [L] However, excessive fat-soluble vitamins can reach toxic levels, harming health and performance.