Jonker, R. (Ragna) (2014) Invloed van looppatroon en stapfrequentie op de verticale grond reactie kracht (vGRF). thesis, Medicine.
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Abstract
Objectives: Many recreational and competitive runners develop running related injuries (RRIs). Several kinetic parameters of the vertical ground reaction force (vGRF) may be associated with these injuries. The aim of this study was to evaluate the effect of different running techniques on the loading rate and other kinetic parameters of the vGRF. Design: Cross-sectional study. Methods: Twenty-two recreational female runners performed five running conditions on a treadmill at 9 km/h. The evaluated running conditions are; the habitudinal running technique, instructed heelstrike, instructed forefoot landing (non-heelstrike), +10% step rate and -10% step rate. Kinetic parameters that have been evaluated are; loading rate, passive peak, active peak, step length, contact time, duty factor, step frequency and vertical stiffness. A linear mixed model analysis with post-hoc bonferroni comparison was used for analyzes. Results: Loading rate was lowest at non-heelstrike (79,04; 95%BI: 67,78-92,17) significant to all other running conditions. The active peak was lowest at the +10% step frequency condition (2,25; 95%BI: 2,17-2,33), significant to the habitutinal running technique, instructed forefoot landing and -10% step rate. Conclusion: This study shows that an instructed forefoot landing results in a low loading rate in female runners compared to other running conditions. Increasing step rate by 10% leads to a decrease in active peak.
| Item Type: | Thesis (Thesis) |
|---|---|
| Supervisor name: | Worp, dr. H. van der |
| Faculty: | Medical Sciences |
| Date Deposited: | 25 Jun 2020 10:43 |
| Last Modified: | 25 Jun 2020 10:43 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/497 |
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