Influence of physical qualities on post-match fatigue in rugby league players

Johnston, Rich D. and Gabbett, Tim J. and Jenkins, David G. and Hulin, Billy T. (2015) Influence of physical qualities on post-match fatigue in rugby league players. Journal of Science and Medicine in Sport, 18 (2). pp. 209-213. ISSN 1440-2440

Abstract

Objectives: This study examined the influence of physical qualities on markers of fatigue and muscle damage following rugby league match-play. Design: Between subjects design. Methods: Twenty-one male youth rugby league players (age 19.2. ±. 0.7 years; height 180.7. ±. 5.6. cm; body mass 89.9. ±. 10.0. kg) participated in the study. Yo-Yo intermittent recovery test (level 1), 3 repetition maximum back squat and bench press were assessed prior to 2 competitive fixtures. Neuromuscular fatigue (countermovement jump [CMJ] and plyometric push-up [PP]), and blood creatine kinase (CK) were assessed before and after match-play. During match-play, movements were recorded using microtechnology. Players were divided into high- and low-groups based on physical qualities. Results: High Yo-Yo and squat performance resulted in greater loads during match-play (. p<. 0.05). There were larger reductions in CMJ power in the low Yo-Yo group at both 24 (ES. =. -1.83), and 48. h post-match (ES. =. -1.33). Despite greater internal and external match loads, changes in CMJ power were similar between squat groups. There were larger increases in blood CK in the low Yo-Yo group at 24 (73% vs. 176%; ES. =. 1.50) and 48. h post-match (28% vs. 80%; ES. =. 1.22). Despite greater contact loads, the high squat group exhibited smaller changes in blood CK post-match (ES. =. 0.25-0.39). Conclusions: Post-match fatigue is lower in players with well-developed high-intensity running ability, and lower body strength, despite these players having greater internal and external match loads.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 19 May 2017 05:15
Last Modified: 19 May 2017 05:15
Uncontrolled Keywords: CK; muscle damage; muscular strength; neuromuscular fatigue; team sports; yo-yo; adolescent; creatine kinase; football; humans; male; muscle fatigue; muscle strength; running; young adult; physiology; clinical and experimental biochemistry
Fields of Research : 11 Medical and Health Sciences > 1199 Other Medical and Health Sciences > 119999 Medical and Health Sciences not elsewhere classified
Socio-Economic Objective: C Society > 92 Health > 9299 Other Health > 929999 Health not elsewhere classified
Identification Number or DOI: 10.1016/j.jsams.2014.01.009
URI: http://eprints.usq.edu.au/id/eprint/32278

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