Title

Biochemical and endocrine responses to impact and collision during elite rugby league match play

Date of this Version

6-1-2011

Document Type

Journal Article

Publication Details

Citation only

McLellan, C. P., Lovell, D. I., & Gass, G. C. (2011). Biochemical and endocrine responses to impact and collision during elite rugby league match play. Journal of Strength and Conditioning Research, 25 (6), 1553-1562.

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2011 HERDC submission. FoR code: 110600

© Copyright National Strength and Conditioning Association, 2011

ISSN

1064-8011

Abstract

The purpose of this study was to investigate the relationship between the prematch and short-term postmatch biochemical and endocrine responses to the intensity, number, and distribution of impacts associated with collisions during elite Rugby League match play. Seventeen elite male Rugby League players each provided blood and saliva samples 24 hours prematch, 30 minutes prematch, 30 minutes postmatch, and then at 24-hour intervals for a period of 5 days postmatch to determine plasma creatine kinase concentration ([CK]) and salivary cortisol concentration ([sCort]). The intensity, number, and distribution of impact forces experienced by players during match play were recorded using portable global positioning systems (GPSs). The change in the dependent variables at each sample collection time was compared to 24 hours prematch and 30-minute prematch measures. The [CK] and [sCort] increased significantly (p 8.1G. [CK] remained elevated 120 hours postmatch identifying that at least 5 days modified activity is required to achieve full recovery after elite Rugby League match play.

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This document has been peer reviewed.