Energy Systems HSC PDHPE

What is the most likely cause of fatigue in a runner completing a 100 m sprint?

• Dehydration

• Accumulation of lactic acid

• Depletion of muscle glycogen

• Depletion of phosphate creatine

Which of the following will occur when an endurance athlete competes in an event lasting two and a half hours? HSC 2014

• The metabolism of fat will decrease

• Fat will be the only fuel source metabolised.

• The metabolism of protein will remain constant during the event

• The metabolism of glycogen will decrease towards the end of the event

What are the waste products of the aerobic energy system?

• Lactate, heat, water

• Lactate, oxygen, creatine

• Carbon dioxide, heat, water

• Carbon dioxide, oxygen, creatine

The graph shows the percentage of energy produced in a variety of activities.

Based on the graph, which of the following statements is the most accurate?

• After two seconds no more ATP is created

• Stored energy plays a very small role in a vertical leap test

• The lactic acid system is the major source of energy at the end of a 100-metre sprint

• Aerobic energy is the major source of energy from the 10-second mark in a 400-metre sprint

The graph shows the relationship between an athlete's running time and the contribution of three energy systems.

Which of the following shows the by-product and rate of recovery following exhaustion for the dominant energy system at 50 seconds running time

• By product: Carbon Dioxide & Rate of Recovery: 30min-2hrs

• By Product: Carbon Dioxide & Rate of recovery: 30sec-5min

• By Product: Lactic Acid & Rate of recovery: 5min-20min

• By Product: Lactic Acid & Rate of recovery: 30min-2hr

The ATP-PC system is utilised during what exercise intensity?

• Sub-maximal intensity (<85% MHR)

• High Intensity (85% MHR)

• High Intensity (95% MHR)

• At rest

At what duration does the aerobic energy system become dominant?

• 5 seconds

• 15 seconds

• 45 seconds

• 75 seconds

An elite 3000m runner would predominantly use which energy system during a race?

• ATP-PC Energy System

• Anaerobic Glycolysis Energy System

• Aerobic Energy System

Which would be the dominant energy system in this physical activity?

• ATP-PC System

• Lactic Acid System

• Aerobic System

The anaerobic glycolysis system

• operates without oxygen

• provides energy for about 10 seconds to 90 seconds

• is used for high intensity exercise

• all of the above

• none of the above