Temporal Kinematic Differences between Forward and Backward Jump-Landing

Datao Xu, Xuanzhen Cen, Meizi Wang, Ming Rong, Bíró István, Julien S. Baker and Yaodong Gu
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Datao Xu: Faculty of Sports Science, Ningbo University, Ningbo 315211, China
Xuanzhen Cen: Faculty of Sports Science, Ningbo University, Ningbo 315211, China
Meizi Wang: Savaria Institute of Technology, Eötvös Loránd University, 9700 Szombathely, Hungary
Ming Rong: Faculty of Sports Science, Ningbo University, Ningbo 315211, China
Bíró István: Faculty of Engineering, University of Szeged, 6724 Szeged, Hungary
Julien S. Baker: Centre for Health and Exercise Science Research, Hong Kong Baptist University, Hong Kong 999077, China
Yaodong Gu: Faculty of Sports Science, Ningbo University, Ningbo 315211, China

IJERPH, 2020, vol. 17, issue 18, 1-12

Abstract: Backward jump-landing during sports performance will result in dynamic postural instability with a greater risk of injury, and most research studies have focused on forward landing. Differences in kinematic temporal characteristics between single-leg and double-leg backward jump-landing are seldom researched and understood. The purpose of this study was to compare and analyze lower extremity kinematic differences throughout the landing phases of forward and backward jumping using single-leg and double-leg landings (FS and BS, FD and BD). Kinematic data were collected during the landing phases of FS and BS, FD and BD in 45 participants. Through statistical parametric mapping (SPM) analysis, we found that the BS showed smaller hip and knee flexion and greater vertical ground reactive force (VGRF) than the FS during 0–37.42% ( p = 0.031), 16.07–32.11% ( p = 0.045), and 23.03–17.32% ( p = 0.041) landing phases. The BD showed smaller hip and knee flexion than the FD during 0–20.66% ( p = 0.047) and 0–100% ( p < 0.001) landing phases. Most differences appeared within a time frame during the landing phase at 30–50 ms in which non-contact anterior cruciate ligament (ACL) injuries are thought to occur and are consistent with the identification of risk in biomechanical analysis. A landing strategy that consciously increases the knee and hip flexion angles during backward landing should be considered for people as a measure to avoid injury during the performance of this type of physical activity.

Keywords: backward jump-landing; non-contact ACL injuries; knee flexion; temporal kinematic; statistical parametric mapping (SPM) (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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