Kinetic changes with fatigue and relationship to running related injuries(RRI) in female runners: a pilot study.

Bentem, H. van (Han) (2015) Kinetic changes with fatigue and relationship to running related injuries(RRI) in female runners: a pilot study. thesis, Medicine.

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Abstract

Objectives The incidence of running related injuries (RRI) is fairly high in many recreational runners. Kinetic variables, like the vertical ground reaction force (vGRF), play a possible role in the development of RRI. The purpose of this study was to analyze how treadmill induced fatigue changed the vGRF and spatio-temporal variables of recreational female runners with and without previous RRI. Design Pilot study. Methods Nine recreational female runners with and nine without previous RRI were taking part in the treadmill induced fatigue protocol. Before and after fatigue the vGRF and spatio-temporal variables of all runners were measured at 9 km/h. The primary parameter was the loading rate of the vGRF. Secondary parameters were the impact- and active peak, step frequency, step length, contact time, duty factor, leg stiffness and arch height. A linear mixed model analysis and post-hoc bonferroni comparison (α=0,05) were performed. Results Treadmill induced fatigue resulted in a significant decrease of the loading rate in the runners with and without RRI. The decrease was not significantly different between both groups. Only in the group with previous RRI the step frequency decreased. This was accompanied by an increase in step length, increase of the contact time, higher duty factor and a decrease in leg stiffness. Conclusion Recreational female runners with and without RRI adapted their running style differently with treadmill induced fatigue, which resulted in changes of the vGRF and spatio-temporal variables.

Item Type:	Thesis (Thesis)
Supervisor name:	Worp, dr. H. van der
Faculty:	Medical Sciences
Date Deposited:	25 Jun 2020 10:54
Last Modified:	25 Jun 2020 10:54
URI:	https://umcg.studenttheses.ub.rug.nl/id/eprint/1498

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