Running-intensity fluctuations in elite rugby sevens performance

Furlan, Nicola and Waldron, Mark and Shorter, Kathleen and Gabbett, Tim J. and Mitchell, John and Fitzgerald, Edward and Osborne, Mark A. and Gray, Adrian J. (2015) Running-intensity fluctuations in elite rugby sevens performance. International Journal of Sports Physiology and Performance, 10 (6). pp. 802-807. ISSN 1555-0265

Abstract

Purpose: To investigate temporal variation in running intensity across and within halves and evaluate the agreement between match-analysis indices used to identify fluctuations in running intensity in rugby sevens. Methods: Data from a 15-Hz global positioning system (GPS) were collected from 12 elite rugby sevens players during the IRB World Sevens Series (N = 21 full games). Kinematic (eg, relative distance [RD]) and energetic (eg, metabolic power [MP]) match-analysis indices were determined from velocity-time curves and used to investigate between-halves variations. Mean MP and RD were used to identify peak 2-minute periods of play. Adjacent 2-minute periods (prepeak and postpeak) were compared with peak periods to identify changes in intensity. MP and RD were expressed relative to maximal oxygen uptake (VO<inf>2max</inf>) and speed at VO<inf>2max</inf>, respectively, and compared in their ability to describe the intensity of peak periods and their temporal occurrence. Results: Small to moderate reductions were present for kinematic (RD; 8.9%) and energetic (MP; 6%) indices between halves. Peak periods (RD = 130 m/min, MP =13 W/kg) were higher (P < .001) than the match average (RD = 94 m/min, MP = 9.5 W/kg) and the prepeak and postpeak periods (P < .001). RD underestimated the intensity of peak periods compared with MP (bias 16%, limits of agreement [LoA] ± 6%). Peak periods identified by RD and MP were temporally dissociated (bias 21 s, LoA ± 212 s). Conclusions: The findings suggest that running intensity varies between and within halves; however, the index used will influence both the magnitude and the temporal identification of peak periods.


Statistics for USQ ePrint 32302
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Accepted version cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 29 May 2017 05:33
Last Modified: 14 Sep 2017 01:53
Uncontrolled Keywords: energy cost; GPS; match analysis; metabolic power; work rate; acceleration; adult; athletes; athletic performance; biomechanical phenomena; competitive behavior; energy metabolism; football; geographic information systems; humans; Male; Motor Activity; Muscle Strength; Muscle, Skeletal; physical endurance; running; task performance and analysis; time factors; young adult
Fields of Research : 11 Medical and Health Sciences > 1106 Human Movement and Sports Science > 110699 Human Movement and Sports Science not elsewhere classified
Socio-Economic Objective: C Society > 92 Health > 9205 Specific Population Health (excl. Indigenous Health) > 920599 Specific Population Health (excl. Indigenous Health) not elsewhere classified
Identification Number or DOI: 10.1123/ijspp.2014-0315
URI: http://eprints.usq.edu.au/id/eprint/32302

Actions (login required)

View Item Archive Repository Staff Only