The following graph is of the vertical ground reaction force for a subject mid-foot strike runner. Notice the magnitude of the impact peak and the magnitude of the active peak.
6. What is the magnitude of the impact peak? (4 points)
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7. What is the time from initial foot contact to the impact peak? (4 points)
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8. What is the loading rate for this impact peak? (4 points)
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9. What is the magnitude of the active peak? (4 points)
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10. If the subject who produced the ground reaction force profile had a mass of 75 kg, normalize the forces with respect to the subject's body weight. (6 points)
Impact Peak Force: Answer:
Impact Peak Force Loading Rate: Answer:
11. How do you account for the differences between the impact peak force, rate of loading, and active peak force between the shod and unshod conditions? (6 points)
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