Preparatory Knee Flexion-Extension Movements Enhance Rapid Sidestepping Performance in Collegiate Basketball Players
JournalFrontiers in sports and active living
PublisherFrontiers Media S.A.
MetadataShow full item record
AbstractLower-limb weight-bearing load distribution in stationary standing influences the timing of rapid first step initiation of importance for functional movement activities and agility performance in sports. This study investigated the effect of pre-step lower-limb loading and unloading with preparatory knee flexion-extension movements on sidestepping performance in fifteen male collegiate basketball players. Participants performed two-choice (step limb) reaction time sidestepping under two conditions: without preparatory movements before the go cue (no-prep-NP) and with continuous alternating knee extension and flexion movements (prep-P). The reaction signal was provided at the beginning of knee extension and flexion and during these movements which corresponded with the largest and smallest loading instants and the transition states between those instants. Sidestepping performance was assessed with three-dimensional kinematic data and ground reaction forces. Step initiation onset time was significantly faster by 13-15% than the NP condition when initiated in the knee flexion phase (p ≤ 0.028, r ≥ 0.70), whereas step-limb unloading interval from step initiation to step lift-off was significantly faster by 12-15% in the knee extension phase (p ≤ 0.01, r ≥ 0.74). The preparatory movements significantly shortened step lift-off by 10-12% (p ≤ 0.013, r ≥ 0.73) and step duration by 17-21% (p < 0.001, r ≥ 0.85) with 19-22% faster step velocity (p < 0.001, r ≥ 0.84), which resulted in 14-15% shorter overall time to step landing (p < 0.001, r ≥ 0.84), irrespective of the loading phases. These results indicated that lower-limb loading with pre-step knee flexion facilitated faster step initiation, while lower-limb unloading with knee extension facilitated faster step-limb unloading, both resulting in faster step lift-off. Bilateral knee flexion-extension movements as a preparatory action could be utilized by invasion sports players to facilitate reactive stepping performance for more effective movement initiation.
SponsorsJapan Society for the Promotion of Science
Identifier to cite or link to this itemhttp://hdl.handle.net/10713/15960
Except where otherwise noted, this item's license is described as https://creativecommons.org/licenses/by/4.0/
- Effects of an Intervention Program on Lower Extremity Biomechanics in Stop-Jump and Side-Cutting Tasks.
- Authors: Yang C, Yao W, Garrett WE, Givens DL, Hacke J, Liu H, Yu B
- Issue date: 2018 Oct
- Coordination and variability during anticipated and unanticipated sidestepping.
- Authors: Weir G, van Emmerik R, Jewell C, Hamill J
- Issue date: 2019 Jan
- The relationship of force output characteristics during a sit-to-stand movement with lower limb muscle mass and knee joint extension in the elderly.
- Authors: Yamada T, Demura S
- Issue date: 2010 May-Jun
- Loading the limb during rhythmic leg movements lengthens the duration of both flexion and extension in human infants.
- Authors: Musselman KE, Yang JF
- Issue date: 2007 Feb
- Unweighted state as a sidestep preparation improve the initiation and reaching performance for basketball players.
- Authors: Fujii K, Yoshioka S, Isaka T, Kouzaki M
- Issue date: 2013 Dec