التفاصيل البيبلوغرافية
| العنوان: |
Spring-Mass Characteristics in Runners Before and After a 56-km Road Ultramarathon. |
| المؤلفون: |
Burns, Geoffrey T., Tam, Nicholas, Langerak, Nelleke G., Zernicke, Ronald F., Lamberts, Robert P. |
| المصدر: |
Journal of Applied Biomechanics; Dec2024, Vol. 40 Issue 6, p492-500, 9p |
| مصطلحات موضوعية: |
MUSCLE fatigue, LONG-distance running, DYNAMICS, DIAGNOSIS, GAIT in humans, DESCRIPTIVE statistics, ATHLETES, HEALTH behavior, PHYSIOLOGICAL stress, GROUND reaction forces (Biomechanics), REGRESSION analysis |
| مستخلص: |
Ultramarathons are a unique model to study the effects of systemic fatigue in athletes. This investigation applied the spring-mass template to study runners before and 2 days after a road ultramarathon to characterize the effects of fatigue on systemic gait patterns. Overground kinetics were captured 7 days before and 2 days after the event in 14 runners. Traditional kinetic and spring-mass parameters were calculated, along with nonlinear regression-derived parameters and spring-mass model fit metrics. After the ultramarathon, vertical force magnitudes and loading rates were unchanged, but impact peaks increased (1.88 ± 0.08–1.95 ± 0.10 bodyweight). Ground contact times were modestly shorter (−3 ± 1 ms), resulting in increased leg stiffness (10.0 ± 0.5–10.3 ± 0.5 kN/m) with equivocal vertical stiffnesses. The deviation from the modeled spring-mass kinetics also increased (171.3 ± 15.0–181.4 ± 16.5 N). Overall, the systemic mechanical behaviors of the runners persisted despite the fatigue and stress induced by a road ultramarathon. These findings support previous observations that runners maintain gross mechanical behavior when fatigued with small compensatory changes in spatiotemporal and traditional spring-mass characteristics. However, these findings also suggest that the variability within that gross behavior may increase after stress, suggesting new opportunities for quantifying those deviations. [ABSTRACT FROM AUTHOR] |
|
Copyright of Journal of Applied Biomechanics is the property of Human Kinetics Publishers, Inc. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |