Analysis of Jumping-Landing Manoeuvers after Different Speed Performances in Soccer Players

Abstract

PurposeRunning at high speed and sudden change in direction or activity stresses the knee. Surprisingly, not many studies have investigated the effects of sprinting on knee’s kinetics and kinematics of soccer players. Hence, this study is aimed to investigate indices of injury risk factors of jumping-landing maneuvers performed immediately after sprinting in male soccer players.MethodsTwenty-three collegiate male soccer players (22.1±1.7 years) were tested in four conditions; vertical jump (VJ), vertical jump immediately after slow running (VJSR), vertical jump immediately after sprinting (VJFR) and double horizontal jump immediately after sprinting (HJFR). The kinematics and kinetics data were measured using Vicon motion analyzer (100Hz) and two Kistler force platforms (1000Hz), respectively.ResultsFor knee flexion joint angle, (p = 0.014, η = 0.15) and knee valgus moment (p = 0.001, η = 0.71) differences between condition in the landing phase were found. For knee valgus joint angle, a main effect between legs in the jumping phase was found (p = 0.006, η = 0.31), which suggests bilateral deficit existed between the right and left lower limbs.ConclusionIn brief, the important findings were greater knee valgus moment and less knee flexion joint angle proceeding sprint (HJFR & VJFR) rather than no sprint condition (VJ) present an increased risk for knee injuries. These results seem to suggest that running and sudden subsequent jumping-landing activity experienced during playing soccer may negatively change the knee valgus moment. Thus, sprinting preceding a jump task may increase knee risk factors such as moment and knee flexion joint angle.

External training load is associated with adaptation in bone and body composition over the course of a season in elite male footballers

“…Total distance was positively associated with the increase in legs BMC during the first part of the season (Phase 2). These associations could be due to the assumed increase in site-specific osteogenic high magnitude loading (i.e., jumping/landing, change in direction ( Daneshjoo et al, 2015 ; Condello et al, 2016 )) that likely to have occurred in players covering a greater distance and/or the ability of the pQCT to detect small changes relative to the measurement error. The positive correlation of high magnitude GPS-derived variables with bone characteristics in the present study underpins the important role for high magnitude activities in the osteogenic effect of football participation.…”

External Training Load is Associated with Adaptation in Bone and Body Composition Over the Course of a Season in Elite Male Footballers

“…Total distance was positively associated with the increase in legs BMC during the first part of the season (Phase 2). These associations could be due to the assumed increase in site-specific osteogenic high magnitude loading (i.e., jumping/landing, change in direction (Daneshjoo et al, 2015;Condello et al, 2016)) that likely to have occurred in players covering a greater distance and/or the ability of the pQCT to detect small changes relative to the measurement error. The positive correlation of high magnitude GPSderived variables with bone characteristics in the present study underpins the important role for high magnitude activities in the osteogenic effect of football participation.…”

Difference in vertical jumping abilities, endurance and quickness of regeneration lower extremity muscle groups after physical effort between CrossFit and climbing athletes

“…The height of each jump was taken from the displacement of the processus spinosus of L3 (the highest vertical position minus vertical position before the onset of the movement) [27]. Force plate data (maximum ground reaction force -MGRF) were normalized to body mass (% BM) and calculated for all the participants [21,28,29].…”

“…Motion capture system is a non-invasive method for recording human movements [18][19][20]. Biomechanics Force Platforms can be used to collect kinetic data relating to ground reaction forces by detecting forces and moments applied to their top surface [21,22]. By the set of marker motion detection cameras, objective assessment and analysis of a competitor in space is possible, while performing specialized training activities, such as vertical jump.…”