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Short-term kinematic adaptation to unanticipated sprint running conditions in field sport

Wdowski, M. M., Gittoes, M. J. R., Irwin, G. and Nokes, Leonard Derek Martin 2013. Short-term kinematic adaptation to unanticipated sprint running conditions in field sport. Presented at: 18th Annual Congress of the European College of Sport Science, Barcelona, Spain, 26-29 June 2013.

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Abstract

An important characteristic of skilled behaviour in unanticipated conditions, such as sprinting in field sports, concerns the functional relationship between adaptive movement variability and performance outcome. The process of improving a skilled behaviour involves developing a stable performance under different conditions with a consistent performance reflecting mastery in a given task (Preatoni et al., 2012). The aim of this study was to extend insight into lower limb kinematic adaptation to unanticipated sprint running conditions in field sport. Methods An automatic marker tracking system (200 Hz) was used to track three-dimensional, bilaterally (lower limb) located active markers during the initial 20 m of sprint run acceleration trials performed by twenty university footballers. The performers were made aware of the final sprint distance prior to initiating the sprint in the anticipated 20 m (A20) condition. In the unanticipated 20 m (U20) and 40 m (U40) conditions, the performers were informed of the final sprint distance immediately after initiating the sprint. The groups mean step velocity was determined as the primary performance measure with its mechanical step determinants e.g. step frequency, being the kinematic measures of adaptation. Results No difference in performance outcome or individual variability of performance outcome between conditions was observed (mean step velocity m.s-1; A20: 6.71±0.20; U20: 6.69±0.19; U40: 6.71±0.20). Determinants of step velocity and their variability were significantly different (p<0.05) between conditions (e.g. mean step frequency Hz; U20: 4.34±0.24; U40: 4.37±0.24). Discussion A stable performance outcome was maintained by the performers between all conditions, which suggested mastery in carrying out the specific task (Preatoni et al., 2012). The combination of a maintained step velocity and adapted determinants are in direct contrast to Hunter et al.’s (2004) mechanical model of sprinting, which may be an example of kinematic adaptations that are specific to the task (Wdowski & Gittoes, 2012). Differences observed in step determinant variability between conditions may allude to the functionality of movement variability in adapting to variable external conditions (Bartlett et al. 2007). Anticipated sprint protocols may subsequently not entirely facilitate skill specific adaptations for unanticipated field sport match conditions.

Item Type: Conference or Workshop Item (Paper)
Date Type: Completion
Status: Unpublished
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
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Last Modified: 04 Jun 2017 05:25
URI: http://orca.cf.ac.uk/id/eprint/51264

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