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The relationship between whole-body external loading and body-worn accelerometry during team sports movements

Nedergaard, NJ and Robinson, MA and Eusterwiemann, E and Drust, B and Lisboa, P and Vanrenterghem, J (2016) The relationship between whole-body external loading and body-worn accelerometry during team sports movements. International Journal of Sports Physiology and Performance. ISSN 1555-0273

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Abstract

Purpose: The aim of this study was to investigate the relationship between whole-body accelerations and body-worn accelerometry during team sports movements. Methods: Twenty male team sport players performed forward running, and anticipated 45° and 90° side-cuts at approach speeds of 2, 3, 4 and 5 m·s-1. Whole-body Centre of Mass (CoM) accelerations were determined from ground reaction forces collected from one foot-ground-contact and segmental accelerations were measured from a commercial GPS/accelerometer unit on the upper trunk. Three higher specification accelerometers were also positioned on the GPS unit, the dorsal aspect of the pelvis, and the shaft of the tibia. Associations between mechanical load variables (peak acceleration, loading rate and impulse) calculated from both CoM accelerations and segmental accelerations were explored using regression analysis. In addition one-dimensional Statistical Parametric Mapping (SPM) was used to explore the relationships between peak segmental accelerations and CoM acceleration profiles during the whole foot-ground-contact. Results: A weak relationship was observed for the investigated mechanical load variables regardless of accelerometer location and task (R2 values across accelerometer locations and tasks: peak acceleration 0.08-0.55, loading rate 0.27-0.59 and impulse 0.02-0.59). Segmental accelerations generally overestimated whole-body mechanical load. SPM analysis showed that peak segmental accelerations were mostly related to CoM accelerations during the first 40-50% of contact phase. Conclusions: Whilst body-worn accelerometry correlates to whole-body loading in team sports movements and can reveal useful estimates concerning loading, these correlations are not strong. Body-worn acclerometry should therefore be used with caution to monitor whole-body mechanical loading in the field.

Item Type: Article
Additional Information: As accepted for publication
Uncontrolled Keywords: Centre of mass acceleration; GPS; Accelerometry; Training Load; Mechanical Load; Peak Acceleration
Subjects: R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Sport & Exercise Sciences
Applied Mathematics
Publisher: Human Kinetics
Date Deposited: 24 Mar 2016 13:49
Last Modified: 07 Oct 2016 10:55
URI: http://researchonline.ljmu.ac.uk/id/eprint/3326

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