Running-intensity fluctuations in elite rugby sevens performance

Furlan, Nicola, Waldron, Mark, Shorter, Kathleen, Gabbett, Tim J., Mitchell, John, Fitzgerald, Edward, 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: 802-807. doi:10.1123/ijspp.2014-0315

Author Furlan, Nicola
Waldron, Mark
Shorter, Kathleen
Gabbett, Tim J.
Mitchell, John
Fitzgerald, Edward
Osborne, Mark A.
Gray, Adrian J.
Title Running-intensity fluctuations in elite rugby sevens performance
Journal name International Journal of Sports Physiology and Performance   Check publisher's open access policy
ISSN 1555-0265
Publication date 2015-09-01
Sub-type Article (original research)
DOI 10.1123/ijspp.2014-0315
Open Access Status Not Open Access
Volume 10
Issue 6
Start page 802
End page 807
Total pages 6
Place of publication Champaign, IL, United States
Publisher Human Kinetics
Language eng
Formatted 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 (VO2max) and speed at VO2max, 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.
Keyword Energy cost
Match analysis
Metabolic power
Work rate
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Human Movement and Nutrition Sciences Publications
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