Knee and ankle biomechanics in 90° side cutting on synthetic turf with shock pad. (2nd September 2022)

• Record Type: Journal Article
• Authors: Elvidge, Thomas; Brown, Sean; Valenzuela, Kevin; Sorochan, John; Weinhandl, Joshua T.; Zhang, Songning
• Is Part Of: Footwear science. Volume 14:Number 3(2022)
• Page Start: 173
• Page End: 183
• Publication Date: 2022-09-02
• Subjects: Artificial turf -- shock pad -- cutting -- injury -- biomechanics -- joint moment; Footwear -- Periodicals; Footwear industry -- Periodicals; Footwear -- Health aspects; Footwear; Footwear -- Health aspects; Footwear industry; Periodicals; 685.3
• DOI: 10.1080/19424280.2022.2077842
• Languages: English
• ISSNs: 1942-4280

Abstract

Abstract: The purpose of this study was to examine differences in knee and ankle biomechanics on synthetic turf with and without a shock pad in two approach velocities during a 90° cutting movement. Twelve recreational male American football or soccer players performed five trials of 90° side cutting in each of four conditions: turf only and turf with shock pad at approach velocity of 3.0 and 4.0 m/s. A two-way (surface × approach velocity) ANOVA was used to analyse selected variables. Knee and ankle variables were generally similar across surface conditions. However, peak knee frontal-plane loading eccentric power was greater ( p = 0.013) while peak knee frontal-plane push-off eccentric power was reduced on the shock pad ( p = 0.020). A surface × approach velocity interaction was detected for peak knee sagittal-plane eccentric power ( p = 0.018), and a post-hoc analysis found a significant increase of peak knee sagittal-plane eccentric power at a faster approach speed on the turf only condition compared to the turf with the shock pad. There were increases in the knee extension moments ( p = 0.004), peak push-off medial ground reaction force (GRF, p = 0.025), peak ankle eversion moment ( p < 0.001), and ankle inversion ROM ( p = 0.001) as approach velocity increased while peak push-off vertical GRF decreased ( p = 0.011). The effects of the inclusion of a shock pad on lower extremity loading during a 90° cutting movement are limited. The results indicate that the turf with the shock pad absorbs more kinetic energy as speed increases than the turf alone.