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With reference to the case study, name the three phases of a 2000 m rowing race and explain the contribution of the relevant energy systems during each phase - Leaving Cert Physical Education - Question e - 2021
Question e
With reference to the case study, name the three phases of a 2000 m rowing race and explain the contribution of the relevant energy systems during each phase. Phase... show full transcript
Worked Solution & Example Answer:With reference to the case study, name the three phases of a 2000 m rowing race and explain the contribution of the relevant energy systems during each phase - Leaving Cert Physical Education - Question e - 2021
Step 1
Phase 1 - Sprint start
Answer
During the sprint start, the body primarily relies on the anaerobic-alactic energy system, which provides immediate energy for short bursts of high-intensity effort. This system is crucial for the initial acceleration as it utilizes stored ATP and phosphocreatine, allowing the rowers to generate maximum power quickly.
Step 2
Phase 2 - Maintenance phase
Answer
In the maintenance phase, the anaerobic-lactic system becomes more significant as the rowers settle into their rhythm. This system supports sustained efforts and is utilized when the intensity is high but cannot be maintained indefinitely. Lactate begins to accumulate as the rowers continue to exert force, leading to a shift towards aerobic contribution in later stages to manage fatigue.
Step 3
Phase 3 - Sprint finish
Answer
During the sprint finish, the body again utilizes the anaerobic-lactic system for rapid energy, pushing through fatigue to achieve the final sprint. At this point, both anaerobic and aerobic systems are engaged, with the anaerobic-lactic system providing quick energy bursts while aerobic metabolism helps sustain efforts until the end of the race.