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Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running
Published on: July 17, 2020
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Kinematic changes during a marathon for fast and slow runners.
Maggie Chan-Roper1, Iain Hunter, Joseph W Myrer
1Department of Exercise Sciences.
Journal of Sports Science & Medicine
|October 19, 2013
Summary
Running kinematics significantly change during a marathon due to fatigue. Fast runners, however, maintain better knee flexion, suggesting improved conditioning and potential benefits from strengthening knee extensor muscles.
Area of Science:
- Biomechanics
- Exercise Physiology
Background:
- Running kinematics are crucial for performance and injury prevention.
- Understanding how these change during endurance events like marathons is important.
Purpose of the Study:
- To describe kinematic changes during a marathon.
- To compare kinematic changes between fast and slow runners.
Main Methods:
- 179 runners were analyzed using high-speed cameras at kilometers 8 and 40.
- Key variables included stride length, contact time, and joint flexion/extension angles.
Main Results:
- All runners showed significant kinematic changes, including increased stride length and contact time.
- Peak knee flexion during support decreased, while hip and knee flexion during swing increased.
- Fast runners exhibited less decrease in peak knee flexion during support compared to slow runners.
Conclusions:
- Marathon running leads to significant fatigue-induced kinematic alterations in all runners.
- Fast runners demonstrate superior maintenance of peak knee flexion during support.
- Strengthening knee extensors may help runners maintain better knee flexion throughout a marathon.
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