• Ineta Nausédaité
4. semester, Sports Technology, Master (Master Programme)
Background:In running, injury risk is related to the magnitude of ground reaction forces (GRF) and cumulative loading.Such loads can be altered by changing the gear ratio.Aim:The aim of this study was to investigate the effects of triceps surae length altering insoles during running.Methods:Kinematic and ground reaction force data was collected from 11 recreational male runners. Participants ran with three different types of insoles: elevated rearfoot, flat, and elevated forefoot. Vertical GRF peaks, braking peak, impact loading rate, and ankle gear ratios were calculated.Results:The forces, gear ratios, and vertical loading rates did not show significant differences among the three insole conditions (p>0.05). In elevated rearfoot condition strong Pearson’s correlation was detected between the impact loading rate and gear ration at the impact peak (r=0.7), and strong negative association was calculated between braking force and corresponding gear ratio (r=−0.73).Discussion:The magnitude of forces, ankle gear ratios, and impact loading did not show a significant difference among the three insole conditions.The significance of the results in this study might have been affected by a small sample size that reduces the statistical power of the analysis, therefore, the results should be treated with caution. An increased sample size would give more power to the prospective study to detect the possible differences among groups.
Publication date6 Jun 2019
Number of pages7
ID: 305243358