HMS, BM EQ-Bank 209 MC Which activity would rely MOST heavily on the ATP-PCr system? High jump 800 metre run Marathon Tennis match Show Answers Only \(A\) Show Worked Solution A is correct: High jump takes 1-3 seconds of explosive effort, perfectly matching ATP-PCr system duration Other Options: B is incorrect: 800m run takes 2-3 minutes, primarily using glycolytic and aerobic systems C is incorrect: Marathon relies almost entirely on aerobic system for 2-4 hours D is incorrect: Tennis involves repeated efforts using all three energy systems